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Document:	DECserver 100 Terminal Server Operations Guide
Order Number:	AA-Z085A-TK
Revision:	0
Pages:	144
Original Filename:

OCR Text

DECserver 100

Terminal Server

Operations Guide

Order No. AA-Z085A-TK

—

January 1985

o
o
~

The DECserver 100 Terminal Server Operations Guide is intended for

the server manager. This manual contains the information required to

set up, manage, monitor, and troubleshoot the DECserver 100 and its
attached terminals.

SUPERSESSION/UPDATE INFORMATION:

This is a new manual.

—

VERSION:

DECserver 100 V1.0

AA-ZO85A-TK
First Printing, January 1985

The information in thijs document is subject to change without notice and should not be
construed as a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this document.

The software described in this document is furnished under a license and may only be used
or copied in accordance with the terms of such license.

No responsibility is assumed for the use or reliability of software on equipment that is not
supplied by Digital or its affiliated companies.
P

The postage-prepaid Reader's Comments form on the last page of this document requests
the user’s critical evaluation to assist us in preparing future documentation.

The following are trademarks of Digital Equipment Corporation:

DEC

MASSBUS

DECmate

PDP

DECnet

P/0OS

VAX

DECUS

Professional

VAXcluster

DECwriter

Rainbow

VMS

DIBOL

RSTS

flflflflfl

RSX

UNIBUS
|

Work Processor

Ethernet is a trademark of Xerox Corporation.

Networks and Communications Publications typeset this manual using Digital's
TMS-11 Text Management System.
S

Contents
Preface

The DECserver 100 Environment
1.1

Local Area Networks and the LAT Architecture. . .

1.2
1.3

The Server Manager Environment . . . . . . . . .
Local Mode and Service Mode . . . . . . .

1.3.1
1.3.2

Local Mode . . . . . . . . .
Service Mode . . . . . . . .

1.4
1.5

Databases on the DECserver 100 . . . . . . . . . . ‘
The Terminal User Environment. . . . . . . ..

« .
. .

o o ..
. .« o«
. . o ..o

Setting Up the DECserver 100 and Its Terminals
.
.
.
.

. Coe
. . . . . ‘
. . . . .
. . . . .

.
.
.
.

2.1
2.2
2.3
2.4

Entering Privileged Status . . . . . .
Setting Up the Privileged Password. .
Setting Up the Login Password. . . .
Setting Up the Server Characteristics.

2.4.1
2.4.2
2.4.3

Network Operation Characteristics . . . . . . . . :
Loading and Dumping Characteristics . . . . . . .
Server Administration Characteristics . . . . . . .

2.5

Setting Up the Terminal Characteristics . . . . . .

2.5.1
2.5.2
2.5.3
2.5.4
2.5.5

Session Control Characteristics. . . . . .
Terminal Data Characteristics . . . . . .
Flow Control Characteristics . . . . . . .
Switch Characteristics . . . . . . . . .« «
Terminal Administration Characteristics .

2.6

DECserver 100 Initialization . . . . . . . . . . . .

2.8

Setting Up a Printer.

2.7

.
.
.
«
.

Setting Characteristics to Factory Specifications
.

. .

e e

.
.
.
.
.

. .

e e

Managing and Monitoring
3.1

Managing the DECserver 100

3.1.1

Security Management .

3.1.2

Service Mode Management

3.1.3

Communication with Terminal Users.

3.1.4

Remote Management of the DECserver 100.

e 3-1

.. 3-3

. ..

... 3-1

. 3-4

Setting Up a Remote Console

Using DECserver 100 Commands on a Remote Console

3.2

Monitoring the DECserver 100 .

.. 3-7

.
.

3.2.1

SHOW COUNTERS.

3.2.2

SHOW NODES .

3.2.3

SHOW SERVER

3.2.4

SHOW TERMINAL.

3.2.5

SHOW USERS .

4.1

What To Do First .

4.2

Problems Affecting All Terminals

4.2.1

Server Green Light Off

4.2.2

Server Green Light Blinking .

.
.

4.2.2.1

Server Parameters Checksum Error.

4.2.2.2

Hardware Revision Level Checksum Error

4.2.2.3

Ethernet Loopback Error

4.2.2.4

Ethernet Heartbeat Error

4.2.3

No Console Messages

4.2.4

Down-line Loading Problems.

Coe

. 3-2

3.1.4.2

3.14.1

. 3-4

...

. 3-5

... 3-7

...

... 3-8
... 3-8

...

... 3-9

... 4-2

e 4-5

C e

e 4-6

C e

.. 4-5

.. 4-6

e 4-6

e 4-8

e 4-7

...

4-10

... 4-9

4.2.4.1

Down-line Load Starts, Then Fails .

. e

4-10

4.2.4.2

Down-line Load Does Not Start

4-11

4.2.5

Message Number 913 Appears .

4-14

4.2.6

Terminal Port or Terminal Hardware Problems .........

4-16

4.3

Problems Affecting Individual Terminals .

4-17

4.3.1

Terminal Display Is Wrong

4.3.2

...

4-17

Blinking Green Light on Server

4-21

4.3.3

PC File Transfer Fails .

...

4-22

4.4

Problems Involving Service Nodes

4-23

4.4.1

Message Timing Problem

4-23

4.4.2

LAT Protocol Errors.

SOy

ORI

AOSTHs

4.4.3
4.4.4

4.4.5
4.5
4.6

4.6.1
4.6.2
4.6.3

Group Codes Mismatch . . . . . . . . e
e e e .. .
Service Node Software Not Running . . . . . . . . . . . ..
Service Node Not Available . . . . . . . . e e e
e e e

4-25
4-26
4-27

Problems Involving the Ethernet .
Digital Service . . . . . . . . .

4-28
4-29

.
.

. . . . . . . . . .. ..
.. . ..o .

Before You Contact Digital . . . . . . . . . .
Repackaging the Server for Shipment. . . . . .
Forwarding Up-line Dump Data . . . . . . . .

. . .
. . .
. . .

.. ..
. . ..
. . ..

4-29
4-29
4-29

DECserver 100 Command Descriptions
BACKWARDS .
BROADCAST .
CONNECT . .

. . . . . . oottt . .53
. . . . oo oot e 5-4
. . oo
ot .. e 5-5

DEFINE\LOGIN PASSWORD
SET

. . . . . . ...

...... 5-7

DEFINE \ PRIVILEGED PASSWORD .

. .

. . .

.. ... 5-8

SET

{5}
{SET }
DEFINE

|SERVER .

. .

DEFINE\TERMINAL

. .
.

. .

e e 5-9
...

...........

5-12

DISCONNECT. . . . . . . .. e
FORWARDS. . . . . . .ottt
HELP . . . . . .. ..... e
INITIALIZE. . . . . . . o
LOCK. . . . .. e
LOGOUT . . . . .. oot e
LOOP . . . . oot e L.
MONITOR COUNTERS . . . . . ... ..........
RESUME . . . . . . ... ... .. ... e
SET NOPRIVILEGED . . . . . . . e
SET PRIVILEGED. . . . . . . . . e
SHOW COUNTERS . . . . . . ... ...... C
SHOW NODES . . . . . v oot
SHOW SERVER. . . . . . ... ... e
SHOW SERVICES. . . . . . ....... e .
SHOW SESSIONS. . . . . ... ..... e
SHOW TERMINAL . . . . . .. ........ C
SHOW USERS. . . . . . . e ...
STOP TEST TERMINAL . . . . . . . C
C.. .
TEST TERMINAL. . . . . . . . .. ... ........
ZERO COUNTERS . . . . . .o oo

5-17
5-18
5-19
5-20
5-22
5-23
524
5-25
5-26
5-27
5-28
5-29
5-32
5-35
537
5-39
5-41
543
544
54
5-47

oSO

Status and Error Messages
A.l

Classes and Formats of Messages.

Message Listings and Explanations.

A.2.1

Informational Messages (message codes 000-099 and 500-599)
Warning Messages (message codes 100-199 and 600-699). . .
Connection Error Messages (message codes 200-299). . . . .

A.2.2
A23

.
.

. . . . . . . . . .. A-1
. I e
e
A-2
.

.A-2

.
.

. A-4
. A-5

. A=6

A2.4

User Error Messages (message codes 700-799) .

A.25

Console Messages (message codes 900-999) .

. A-10

Glossary
Figures
Local Area Network (LAN)

.. 1-2

Server Manager’s Remote Console on an Ethernet.

.
.

. . . . . . . . . . .
Server Software and the DECserver 100 Databases

LAT Network Components.

Breakdown of LAT Network Components.

.
.

. 1-5
. 3-4

.. 4-1

.. 4-3

... 2-3

Tables
Server Characteristics . . .
Terminal Characteristics. .

. . . . . . . . . . .
Setting Up Terminal Characteristics for a Printer .

... 2-17

2-17

Terminal Behavior and Possible Problems

4-18

Classes of Status and Error Messages.

. S

AAT:

Preface

The DECserver 100 Terminal Server Operations Guide presents information needed
to set up, manage, monitor, and troubleshoot the terminal server. For information
about routine operation of the DECserver 100 terminals, refer to the DECserver 100
Terminal Server User’s Pocket Guide
Intended Audience

This guide is intended for anyone who is responsible for maintaining and managing a
DECserver 100 Terminal Server. In this guide, that person is the server manager.
Structure of This Guide
Chapter 1

provides an overview of the DECserver 100 and of the server manager’s
environment.

Chapter 2

provides in-depth information on using the DECserver 100 commands
to set up the server and its terminals.

Chapter 3

discusses the DECserver 100 commands you use to manage and monitor the server and its terminals.

Chapter 4

contains a troubleshooting guide for the DECserver 100 and its terminals.

Chapter 5

contains a complete alphabetical reference of the DECserver 100 commands.

Appendix A

provides a listing and explanation of all DECserver 100 status and error
messages.

vii

Other DECserver 100 Terminal Server Documents
e DECserver 100 Terminal Server Software Installation Guide

Describes the installation and configuration of the server software.
e DECserver 100 Terminal Server User’s Pocket Guide.

Summarizes the DECserver 100 terminal user’s environment.
o DECserver 100 Terminal Server Site Preparation/Hardware Installation Guide
Describes environmental requirements for the DECserver 100 and the installation of

the hardware unit.
A

iiog,

e DECserver 100 Terminal Server Identification Card.

Contains identification information entered by the hardware installers, system
managers, and the network manager.
e LAT Network Manager’s Guide

Discusses the Local Area Transport (LAT) architecture, the LAT Control Program
(LCP), and network troubleshooting.

Conventions Used in This Guide
Convention

Meaning

dot matrix

Dot matrix indicates examples of system output or user input. System out-

put is in black; user input is in red.

UPPERCASE

Uppercase in commands and examples indicates that you should enter the
characters as shown (enter either uppercase or lowercase).

italics

Italics in commands and examples indicate that either the system supplies or
that you should supply a value.

[]

Square brackets indicate that the enclosed text is optional. If there is more
than one option, you can choose one and only one of the options. Do not type
the brackets when you enter the command.

{ }

Braces indicate that the enclosed text is required and you must choose one

and only one of the options. Do not type the braces when you enter the
command.

(KEY

Indicates that you should press the specified key.

indicates that you

should press the

key at the same time as the x key, where x is a letter.
Note that unless otherwise specified every command line is terminated by
pressing the

key.

All numbers are decimal unless otherwise noted. All Ethernet addresses are giveh in

hexadecimal.

NOTE

Generally you can abbreviate command keywords to the first three
characters or the number of characters that make the keyword
unique.

viii

1
The DECserver 100 »Environment

The DECserver 100is a high performance terminal server for use on an Ethernet local
area network. It allows up to eight terminal users to access any of a set of computer
systems on the Ethernet. The terminal users’ response time and throughputis similar
to that for terminals directly connected to a computer system. With a DECserver 100,
users can switch among several data processing tasks more quickly and more conveniently than they can without a terminal server.

1.1 Local Area Networks and the LAT Architecture
Figure 1-1 shows how the DECserver 100 fits into a computer network called a local
area network (LAN). Local area networks serve relatively small areas; ranging, for
example, from a section of a building to a college campus. The individual computers
on the LAN are called network nodes.

The DECserver 100 and the nodes it communicates with must support the Local Area
Transport (LAT) architecture. The LAT architecture manages the sessions that the
DECserver 100 establishes between its terminals and network nodes.

Support of the LAT architecture requires that LAT software reside on both the DECserver 100 and on the nodes with which it interacts. The LAT software that resides on
the DECserver 100is called server software. The server softwareis down-line loaded to
the server from one of the nodes on the network. The LAT software residing on the
other LAT nodes is the service node software; so called because it resides on nodes
that provide services to DECserver 100 terminal users.

To down-line load the server, a system manager first installs the server software on an
Ethernet node which supports the Digital Network Architecture (Phase 1V). That

node is then a load host. When power is applied to the DECserver 100, the load host
down-line loads the software over the network to the server. The DECserver 100
INITIALIZE command also generates a down-line load.

VAX

| DEC-20 l - PDP-11

VAX

iy,

I DEC-10 l

ETHERNET CABLE

DECserver 100

TERMINALS

Figure 1-1:

TERMINALS

TW122

Local Area Network (LAN)

System managers can install the server software on a number of load hosts. Digital

recommends that the network manager establish a minimum of two load hosts on

every LAT network; with at least one load host for every ten DECserver 100 units on

larger networks.

1.2 The Server Manager Environment
The server manager is the person responsible for the operation of the DECserver 100

and its terminals. As the server manager, you try to make certain that each terminal
user has ready access to the neétwork services he or she requires.
Four broad categories of tasks can be assigned to the server manager:

e Setting up the DECserver 100 and its attached terminals

* Managing the routine operations of the server and its terminals
* Monitoring the status and utilization of the server, terminals, network nodes, and

the Ethernet

* Troubleshooting the DECserver 100 and terminals

1-2

DECserver 100 Terminal Server Operations Guide

The rest of this chapter discusses local mode and service mode on the DECserver 100,
databases on the DECserver 100, and the terminal user’s environment. Chapter 2
discusses initial and subsequent setups of the server and terminals. Chapter 3 covers
management and monitoring topics, and Chapter 4 discusses troubleshooting.

1.3 Local Mdde and Service Mode
The DECserver 100 provides two modes of operation for the terminal user: local mode
and service mode.

1.3.1 Local que

In local mode you communicate directly with the DECserver 100. The server software
interprets your terminal input directly without transmitting it to a network node.
Your terminal entries are commands in the DECserver 100 command set.
There are two kinds of DECserver 100 commands — those mtended for the terminal
user, and those intended for the server manager.

The commands for the terminal user are nonprivileged because they affect only the
user’s terminal. The user has nonprivileged status.
Commands for the server manager require privileged status because they can affect
the server and all the terminals. To assume privileged status, you need to know the
privileged password (see Section 2.1). The password helps ensure that unauthorized
persons do not gain access to the privileged commands. Privileged status also gives
you access to all the nonprivileged commands.
In local mode, the DECserver 100 issues status and error messages in response to
many commands. The messages appear on your terminal. All messages employ a

standard format and describe the status or error in a brief comment. Appendix A lists
each message with a more detailed explanation.

1.3.2 Service Mode

Service mode is an environment nearly identical to that of a terminal connected
directly to a network computer system. All terminal input and output is directed to
and from a particular node on the local area network.
Three definitions are useful in discussing service mode:

e Service node - a network computer system to which DECserver 100 terminal users
have access.

e Service - a resource offered to DECserver 100 terminal users by one or more service
nodes. A service can be equivalent to a service node name or it can represent
resources available from one or more service nodes.
e Session - the interaction between a terminal user and a service.

The DECserver 100 Environment

1-3

Each terminal user can have up to four sessions in effect at the same time. One
session is active and one to three sessions are temporarily inactive. Commands such
as BACKWARDS and FORWARDS (issued in local mode) allow the terminal user to

switch among sessions.
This multiple session capability allows the terminal user to perform several tasks at
once. For example, the user can be editing a report in one session, and then switch to

another session to access file data for the report.

1.4 Databases on the DECserver 100
There are two databases defined in DECserver 100 memory: the permanent database,

and the operational database. Both contain characteristics for the server and its
attached terminals. The server software uses these characteristics to carry out its

functions.

When a terminal user logs in, the permanent characteristics for that terminal are
copied from the permanent database to the operational database. They then become

the terminal’s operational characteristics.

When you initialize the server, the permanent server characteristics are copied to the
operational database. These characteristics are then the operational characteristics

for the server.

The permanent database itself remains unchanged when terminal users log in and
when you initialize the server. However, you can change the characteristics in the
permanent database with the DEFINE TERMINAL and DEFINE SERVER com-

mands.

Figure 1-2 shows the relationships among the server software, the permanent data-

base, and the operational database.
When the DECserver 100 arrives at your facility, the permanent database contains
the factory specified characteristics for the server and the terminals. They are copied

to the operational database when you first install and initialize the server. After
modifying the permanent database, you can restore the factory specified values by
using the software reset procedure (refer to Section 2.7).

1.5 The Terminal User Environment
Typically, a terminal user spends most of his or her time in service mode using one or
more service sessions.

sy,

As the server manager, you may also spend a considerable amount of time in service

mode. The DECserver 100 Terminal Server User’s Pocket Guide furnishes details
about access to service mode, and about the terminal user’s environment.,

1-4

DECserver 100 Terminal Server Operations Guide

PERMANENT DATABASE

PERMANENT DATABASE
t T

ve
t:.|>J

DATA

1|2|3|4|5[6|7]|8

1|2|3|4|5]|6[7]8

SERVER

TERMINAL DATA

SERVER INITIALIZATION

TERMINAL DATA

SERVER | | |
DATA

112|3|4|5|6[7|8

OPERATIONAL DATABASE

{fi

OPERATIONAL DATABASE

TW121

Figure 1-2: The Server Software and the DECserver 100 Databases

‘The DECserver 100 Environment

1-5

oo,

2
Setting Up the DECserver 100 and Its Terminals

This chapter contains the information you need to set up the DECserver 100 and its
terminals for routine operation.

Sections 2.2 and 2.3 show you how to set up the login and privileged passwords. Setup
for the server and terminal characteristics is covered in Sections 2.4 and 2.5. Sections
2.6 through 2.8 discuss initializing the server, resetting characteristics to factory specifications, and setting up a printer.

When your DECserver 100 is initially installed, the factory specified values are in
effect for the terminal characteristics, the server characteristics, and the passwords.
You use the information in this chapter to set up new values for the characteristics
and the passwords. Then you initialize the server to make your setups operational.

Subsequent setups for the terminals become operational when each terminal user logs

in. Subsequent setups for the server and passwords take effect each time the server is
initialized.

2.1 Entering Privileged Status
To begin setup, enter privileged status to gain access to the privileged commands.
Type the SET PRIVILEGED command. In response to the Password> prompt, type

the privileged password. If your DECserver 100 has just been installed, the factory
specified password, ‘“‘system”, is in effect.
Local* SET PRIVILEGED
Password>» SYSTEM (not echoed)
Local>

Your terminal is now the privileged terminal, and you can enter privileged commands
at that terminal. You can begin to set up the desired operating parameters for the
DECserver 100 and its terminals.

2-1

2.2 Setting Up the Privileged Password
Your first task should be to set up a new privileged password. This password helps

ensure that unauthorized persons do not gain access to the privileged commands. Use
the DEFINE PRIVILEGED PASSWORD command. Here is an example using the

password A1B2C3:
lLocal>

DEFINE

PRIVILEGED

‘Password> A1B2C3

(not

Verification» ALBZC3

PASSWORD

echoed)

(not echoed)

Local
>

For security, the password you enter is not echoed on your terminal.
The new password is stored in the permanent database. It becomes operational when
you initialize the DECserver 100. If your DECserver 100 is already running and you
want to make the new privileged password take effect 1mmed1ately, refer to Section

3.1.

ORI

2.3 Setting Up the Login Password

You can require that any or all of the terminal users enter a password when they log

in. This is the login password. If you define the LOGIN characteristic as ENABLED
for a terminal, the login password is required at that terminal (see Section 2.5.5). The

factory specified login password is “‘access”. It is recommended that you set up a new
password after initial installation of the server and terminals.

To set up the login password enter the DEFINE LOGIN PASSWORD command.
Here 1s an example using the password D4E5F6:
Local>» DEFINE

Password> DAESFGE

(not

Verification» DAESFB

PQBEMQRD

echoed)
(not

echoed)

sy,

Localx

Your new login passwordis storedin the permanent database. It becomes operational

when you initialize the DECserver 100. If you wish to have it take effect immediately,

refer to Section 3.1.

2.4 Setting Up the Server Characteristics
You can display the current server characteristics by entering the SHOW SERVER |
command.
Local»

SHOW

SERVER

2-2

DECserver 100 Terminal Server Operations Guide

SHOW SERVER lists the characteristics stored in both the permanent and operational databases. Refer to Chapter 5 for a sample of the SHOW SERVER display.

When you set up the server characteristics, you normally want the values you choose

for the characteristics to be retained each time you initialize the server. Therefore,
you use the DEFINE SERVER command which updates the permanent database.
Following setup, you can change the server characteristics. Use the DEFINE
SERVER command to modify the permanent characteristics. These changes become
operational when you initialize the server. Use the SET SERVER command to modify
the operational characteristics. These changes become operational immediately, but
do not stay in effect after initialization.

To set up the server characteristics, specify a value for each with the DEFINE

SERVER command. Chapter 5 contains the command description and the syntax for
DEFINE SERVER. Table 2-1 lists the server characteristics. Sections 2.4.1 through

- 2.4.3 describe the server characteristics.

Table 2-1:

Server Characteristics

Function

Characteristic

specifies the interval between server messages on the Ethernet, in

CIRCUIT TIMER

CONSOLE

designates one server terminal as the console.

DUMP

determines whether up-line dumping occurs.

HEARTBEAT

enables or disables collision detect circuitry.

—

KEEPALIVE TIMER

milliseconds.

specifies the interval between server messages when no data is

transmitted.

LOCATION

designates the location of the server.

limits the number of login attempts.

NAME

assigns a server name.

NUMBER

specifies a server number.

SOFTWARE

specifies the file name of the DECserver 100 software load image.

Setting Up the DECserver 100 and Its Terminals

2-3

2.4.1 Network Operation Characteristics

Three server characteristics affect the operation of the network. More details about

these characteristics appear in the LAT Network Manager’s Guide.
CIRCUIT TIMER

The circuit timer value defines the interval in milliseconds (ms) between messages
transmitted from the terminal server to a service node. Your choice of the timer value

affects the response time at the terminals attached to the server and also the loading
of the service nodes. You should coordinate it with your network manager and the
node system managers.
Ay,

If you choose a low value for CIRCUIT TIMER, the response time for the terminals is

decreased, but the demand upon service nodes increases. A long interval minimizes
node loading, but extends user response time.

The default for CIRCUIT TIMER is 80 milliseconds. This is the value recommended
for interactive terminal use on timesharing systems. It should only be changed after

consulting with the network manager. To improve response time, you can reduce the
circuit timer value if your network has lightly loaded service nodes. If the network and
the service nodes are very heavily used, a longer circuit timer valueincreases service
node performance.
KEEPALIVE TIMER
The value you choose for KEEPALIVE TIMER is less critical for overall performance

than the circuit timer value. The keepalive timer defines the interval in seconds

between messages in which no data is being transmitted. The server sends status

messages on the Ethernet at these intervals. Discuss the keepalive timer choice with
your network manager.
The default value for KEEPALIVE TIMER is 20 seconds. This is recommended for
normal Ethernet environments. For a heavily loaded Ethernet, you should consider

using a value between 20 and the maximum of 180.
HEARTBEAT

Collision detect circuitry senses collisions of messages transmitted on the Ethernet.
Heartbeatis a characteristic that indicates the status of the collision detect circuitry
at the DECserver 100 transceiver.
For all Digital transceivers, and others supporting collision detect circuitry, the

HEARTBEAT characteristic should be enabled for error-free operation. If your transceiver does not support the testing of collision detect circuitry, enter DISABLED for
HEARTBEAT. The default is ENABLED.

Discuss the HEARTBEAT characteristic with your network manager.

2-4

DECserver 100 Terminal Server Operations Guide

2.4.2 Loading and Dumping Characteristics
The DUMP and SOFTWARE characteristics affect down-line load and up-line dump
operations.
DUMP

If the server software detects a fatal error, it performs a fatal bugcheck and reinitializes. When you define DUMP as ENABLED, you enable up-line dumps of server
memory when fatal bugchecks occur. An up-line dump normally goes to the same load
host that down-line loaded the server software. If that hostis not available, the dump
is directed to any available load host on the network.
It is recommended that you support up-line dumping by setting DUMP to its default,
ENABLED. If you enter DISABLED, up-line dumping is not performed.

You should mform the system managers for the load hosts if you change the DUMP
characteristic.

SOFTWARE

When you initialize the server, the software load image is down-line loaded. The
server sends a message to a load host that identifies the image.

The default file name for SOFTWARE is PS0801ENG. Normally you do not modify
this file name. However, if you and a host system manager wish to load a different
software load image, specify its file name with the SOFTWARE characteristic. The
directory for the new file name remains the system load default directory.

2.4.3 Server Administration Characteristics
A number of server characteristics can assist you in server administration.
LOCATION

The server location appears in the SHOW SERVER command, and it can be useful if

you have responsibility for a number of servers. The server passes the location to
service nodes in its messages. LOCATION is a value of 1 to 16 keyboard characters
enclosed in quotation marks. There is no default for LOCATION.
NAME

NAME specifies the server name. The name is useful for identifying the server (it
appears in the SHOW SERVER display), and service nodes can use it to identify
reachable servers on the Ethernet. You should make sure that NAME matches the
DECnet node name given the DECserver 100 when the server software was installed
on a load host. See the system manager of the load host.

Service node system managers can display the server name using a network management command.

The server name is a string of 1 to 16 keyboard characters enclosed in quotation
marks. The default name is “DECserver 100.”

Setting Up the DECserver 100 and Its Terminals

2-5

NUMBER

NUMBER specifies a value from 0 to 32767 which you can use in any way to identify a

DECserver 100. It appears in the SHOW SERVER display. The default is O.
CONSOLE

CONSOLE identifies a console terminal. This is one of the terminals attached to the
server. A console terminal is necessary for performing server troubleshooting. The

console displays status messages for down-line loading, up-line dumping, and
bugchecks. The default console terminal is the terminal connected to port 1 at the
server hardware unit.
LOGIN LIMIT

LOGIN LIMIT is a tool for enhancing security by restricting access to the terminals
and server. When LOGIN is enabled at a terminal, a prospective user is allowed a
limited number of attempts to log in. If the user fails to type the correct password, the

terminal port disables for a period of one minute. You specify the permitted number

of attempts per minute with LOGIN LIMIT. The default value is three attempts per
minute. You can enter any number from 0 to 250, or you can enter

NOLIMIT. If you

specify 0, you disable access to the server for all terminals that have the terminal
characteristic LOGIN ENABLED.

2.5 Setting Up the Terminal Characteristics
s,

The terminal characteristics take effect at the terminal’s port on the server. When you
set up the terminal characteristics, you do not affect the terminal unit itself.

You can list the current terminal characteristics using the SHOW TERMINAL command. This command shows the characteristics which are stored in both the perma-

nent and operational databases.
To display the characteristics for a specific terminal, for example terminal 3, enter the

following:
Local®

|
SHOW

TERMINAL

To list the characteristics for all the terminals, enter this command:

Local> SHOW TERMINAL ALL
To set up the characteristics for the terminals, use the DEFINE TERMINAL command. DEFINE TERMINAL modifies the permanent database, and the setup characteristics become operational each time a terminal user logs in.

Following setup, you and the terminal users can modify the permanent characteristics
with the DEFINE TERMINAL command, or modify the operational characteristics
with the SET TERMINAL command. Certain terminal characteristics require privi-

leged status to be changed.

2-6

DECserver 100 Terminal Server Operations Guide

To set up the terminal characteristics, specify
a value for each with the DEFINE
TERMINAL command. Chapter 5 has the command description and syntax for DEFINE TERMINAL. Table 2-2 lists the terminal characteristics. Sections 2.5.1
through 2.5.5 describe the terminal characteristics.
NOTE

Keep a record of the characteristics you define for each terminal. If
the DECserver 100 unit should fail, the permanent database may be
lost. A record (in a notebook, or a file on a service node) can expedite
setting up the terminals on a new DECserver 100.

Table 2-2:

Terminal Characteristics

Characteristic

Function

AUTOBAUD

enables the server to automatically

AUTOCONNECT

determine the terminal speed, character size, and parity.

enables the server to automatically connect the terminal to
a specified service at login or after abnormal service terminations.

BACKWARD SWITCH

BROADCAST

specifies the keyboard character used to switch to the previ-

ous session while in service mode.

enables the receipt of broadcast messages from other terminals.

CHARACTER SIZE

specifies the number of data bits in each character ex-

DEDICATED SERVICE

specifies a permanent service for the terminal.

FLOW CONTROL

specifies whether the terminal and server can control data

FORWARD SWITC

specifies the keyboard character used to switch to the next

GROUP CODES

restricts the terminal to specified groups of service nodes.

INPUT FLOW CONTROL

specifies whether the server can control data flow from the

changed between the terminal and the server.

flow to and from the terminal.
session while in service mode.

terminal.

INPUT SPEED

specifies the speed for transmissions from the terminal to
the server.

LOCAL SWITCH

specifies the keyboard character used to enter local mode

determines whether a password is required for server login.

from service mode.

(continued on next page)

Setting Up the DECserver 100 and Its Terminals

2-7

Table 2-2 (cont.):

Terminal Characteristics

Characteristic

Function

LOSS NOTIFICATION

specifies whether the user is signaled when data characters

are lost due to data errors or overruns.
MESSAGE CODES

specifies whether 3-digit codes appear with server messages.

NAME

specifies the terminal name.

OUTPUT FLOW CONTROL

specifies whether the terminal can control data flow from

the server.
OUTPUT SPEED

specifies the speed for transmissions from the server to the

terminal.
PARITY

specifies terminal parity.

PREFERRED SERVICE

specifies a preferred service for the terminal.

SESSION LIMIT

restricts the number of terminal service sessions.

SPEED

specifies input and output speed for transmissions between

the server and the terminal.
TYPE

specifies the terminal type.

USERNAME

specifies a login user name.

VERIFICATION

determines whether session verification messages appear.

2.5.1 Session Control Characteristics
You can specify terminal characteristics to assist in coordinating terminal users’
access to network services.

SESSION LIMIT

If you wish to limit the number of service sessions for any terminal user, you can
modify that terminal’s SESSION LIMIT. You can set SESSION LIMIT to values of
0, 1, 2, 3, or 4. If you enter the value zero, the terminal user cannot establish any
sessions with the CONNECT command or the autoconnect function. The user is
limited to local mode. The default for SESSION LIMIT is the maximum value of 4.
DEDICATED SERVICE

The DEDICATED SERVICE feature is designed for terminal users who require only
one service for an extended period. The server connects the user directly to the
- dedicated service when he or she presses any key on the terminal.

2-8

DECserver 100 Terminal Server Operations Guide

With a dedicated service, the terminal reacts like a terminal connected directly to a

service node, and local mode is not available for the terminal. The user need have no

knowledge of the DECserver 100 or its local commands in order to use the terminal.
To enable a dedicated service, VAX, for terminal 2, enter the following:
Local>

DEFINE

TERMINAL

Local>

LOGOUT

TERMINAL

DEDICATED

SERVICE

WVAX

To disable the dedicated service, VAX, at terminal 2, type the following:
Locals

DEFINE

TERMINAL

Local>

LOGOUT

TERMINAL

DEDICATED

SERVICE

NONE

NOTE
You cann ot use the SET TERMINAL command to establish a dedi-

cated service for a terminal if that terminal is currently logged in. Use
the DEFINE TERMINAL command or wait until the terminal user
logs out.

PREFERRED SERVICE
A terminal user may access a

particular service often, but still require resources

available elsewhe re on the Ethernet. If you assign a preferred service to a terminal
and enable AUTY( JCONNECT, the server connects the terminal directly to that ser-

vice at terminal lc gin (as in the case of a dedicated service). However, with a preferred
service, the user ¢ »an switch to local mode at any time and then make connections to
other services.

If you assign a pt

eferred service without AUTOCONNECT enabled, the server does

not connect the te rminal upon login. However, the CONNECT command can be used
without a service name. The server makes the connection to the preferred service.

The default for P REFERRED SERVICE is NONE.

AUTOCONNECT

AUTOCONNECT permits automatic connections to network services, and is recommended for most terminal users.

How the server functions with AUTOCONNECT enabled depends upon whether you
also specify PREFERRED SERVICE, DEDICATED SERVICE, or neither.
e With a PREFE RRED SERVICE, the server:

Connects the terminal to the preferred service at login

- Automaticajly attempts to reestablish the current session if the connection for
the session fails

—

Connects to the preferred service if the user enters the CONNECT command

without a service name.

Setting Up the DECserver 100 and Its Terminals

2-9

e With a DEDICATED SERVICE, the server:

~ Connects the terminal to that service at login
-

Attempts to reestablish the connection if the service session fails.

e With neither

a PREFERRED SERVICE nor a DEDICATED SERVICE defined,

the server attempts to reestablish any service connection that terminates abnormally.
With AUTOCONNECT, attempts to reconnect are made at 20 second intervals, and

they continue until the user enters local mode. Unless a dedicated service is in effect,
a status message appears at the terminal indicating that the server is trying to restart

a session. The new connection can be made to any service node that supplies the same
service. In a cluster environment, for example, this feature provides automatic failover to a working service node in the cluster.

AUTOCONNECT is especially helpful when a user wishes the server to repeat connection attempts to a nonoperational service node. When the node comes up, the
server software notifies the user with an audible beep signal and a message. The

default for AUTOCONNECT is DISABLED.

GROUP CODES

GROUP CODES help you define the environment for the DECserver 100 terminals.
Each service node and each terminal is assigned one or more group codes. If any group
code applies to both a terminal and a service node, then the terminal user is author-

ized to use that node’s services.

You limit the terminal user to certain available services by specifying group codes for

the terminal. The terminal user can use services offered only by his or her authorized
service nodes. Also, with the SHOW commands, the user receives information for the
authorized services only.

The network manager normally coordinates the assignment of group codes for the
service nodes and servers. The DECserver 100 supports group codes in the range 0 to

127 only. Group codes are discussed further in the LAT Network Manager’s Guide.
When you enter a code list for GROUP CODES, use commas (,) to separate code

digits. A hyphen separating two code digits denotes a range of groups. ENABLED
gives the terminal access to the listed groups; DISABLED denies access. For example,
with the following DEFINE TERMINAL command, access to groups 1, 3, and 5
through 8 is added to any previously defined group access.
Local>

DEFINE

TERMINAL

GROUP

CODES

1:3,

5-8

ENABLED

The default is GROUP CODE 0 ENABLED. When all terminals and service nodes
implement this default, each terminal has access to all services on the Ethernet.

2-10

DECserver 100 Terminal Server Operations Guide

2.5.2 Terminal% Data Characteristics
A number of terminal characteristics determine the make-up of the data transmitted
between the terminal and server.

AUTOBAUD

AUTOBAUDis a means by which the server, at terminal login, automatically senses
the terminal’s speed, parity, and character size. The server then adjusts its terminal
port characteristics accordingly.

For AUTOBAUD to function correctly, the terminal’s internal parameters must be set
as follows:

e The terminal’s input speed and output speed must be the same. The permissible
speed values are listed in the DEFINE TERMINAL command descriptionin Chapter 5.

e The terminal must have one of the following character size and parity combinations: CHARACTER SIZE 8 and PARITY NONE, or CHARACTER SIZE 7 and
These are the défault parameters for all terminals in the Digital VT series. Consult
the terminal operator’s guide if necessary.

If you wish to operate the terminal with different input and output speeds, or with
other combinations of character size and parity, set up AUTOBAUD to DISABLED.
Then define speed, character size, and parity as discussed in the following sections.
By default AUTOBAUD is enabled.

SPEED, INPUT SPEED, OUTPUT SPEED
If you do not enable AUTOBAUD, you must define a terminal speed characteristic.
The input and output speeds of a terminal are expressed in bits per second (bps). The
permissible speed values are listed in the DEFINE TERMINAL command description in Chapter 5. Normally, all you need to specify is a value for SPEED. Enter
values for INPUT SPEED and OUTPUT SPEED only if the two are different.
The default value for the speed characteristics is 9600 bps.

CHARACTER SIZE
Each character that is transmitted from terminal to server is made up of 7 or 8 data
bits. Server software automatically formats the characters for transmission from the
server to the service node. Define CHARACTER SIZE as 7 if a terminal only supports
7-bit operation; otherwise define it as 8. The operator’s guide for the terminal you are
using can assist you in determining character size. The default value is 8.

If you have AUTOBAUD enabled, the server automatically sets the character size.

Setting Up the DECserver 100 and Its Terminals

2-11

PARITY

PARITY provides a means for the DECserver 100 to check terminal characters for
transmission errors. If a terminal supports PARITY, the parity can be ODD or EVEN.
If parity is not supported on a terminal, enter the default NONE. With AUTOBAUD

enabled, the server sets terminal parity automatically.

NOTE
The DECserver 100 does not support terminals using mark or space

parity. Older Digital terminals, such as the LA36, may require setting
up with jumpers to operate with the server. Refer to the terminal
operator’s guide for details.

2.5.3 Flow Control Characteristics
If terminal data is exchanged at high speeds, memory space set aside to store messages prior to processing can become temporarily full. Data is lost if it arrives when

this memory is full. Flow control inhibits transmissions between the terminals and
server to prevent this loss.

FLOW CONTROL, INPUT FLOW CONTROL, OUTPUT FLOW CONTROL
INPUT FLOW CONTROL applies to data incoming at the server from the terminal.

OUTPUT FLOW CONTROL applies to data outgoing from the server to the terminal.
f
Set FLOW CONTROL to ENABLED for normal applications for terminals that
support XOFF and XON flow control characters. (Refer to the operator’s guide for the
terminals.) Set FLOW CONTROL to DISABLED for terminals that do not support

XOFF/XON flow control and for personal computer file transfers.
INPUT FLOW CONTROL and OUTPUT FLOW CONTROL provide the flexibility

for controlling transmissions in one direction only. The default for flow control is

ENABLED in both directions.
LOSS NOTIFICATION
You can enable LOSS NOTIFICATION at each terminal. LOSS NOTIFICATION
functions when a character is lost because of parity errors, framing errors, data overruns, or other reasons. The server transmits a BEL character (an audible beeping

sound) to the terminal. This signals the terminal user that characters are lost so that

he or she can reenter them. The default is ENABLED.

2.5.4 Switch Characteristics
Several terminal characteristics allow the terminal user to switch between local and
service modes, and between service sessions.

2-12

DECserver 100 Terminal Server Operations Guide

LOCAL SWITCH

The local switch character can be used to enter local mode from service mode. You
can set up any keyboard character as the local switch, but an unused control character is recommended. The default is NONE. (The
key can always be used to
enter local mode from service mode.)

FORWARD SWITCH, BACKWARD SWITCH

The characters jmu specify in FORWARD SWITCH and BACKWARD SWITCH

allow the user, in service mode, to transfer between two service sessions. The FORWARD SWITCH character activates the “next’” session. This is the second session
from the top in the SHOW SESSIONS display. The BACKWARD SWITCH character activates the “previous’ session; the session at the bottom of the SHOW SESSIONS list. If there are only two sessions in effect, both characters restart the noncurrent session.
Choose separate characters for each of the switches. Do not select characters that the
terminal user is likely to enter routinely while using a service. The user interrupts the
current session vérhen he or she presses a switch character. Undefined control characters such as CTRLUA) are recommended for these switch characteristics.
The default for these switch characters is NONE.

2.5.5 Terminal Administration Characteristics

A number of terminal characteristics affect the day-to-day administration of a terminal.

LOGIN is an important security tool. This characteristic is a privileged command
parameter. It permits you to require that a terminal user enter a password to gain
access to server functions. LOGIN ENABLED permits access only with a password.
LOGIN DISABLED permits access without a password. You specify the password
using the DEFINE LOGIN PASSWORD command (see Section 2.3). LOGIN is disabled by default to simplify DECserver 100 installation. It should be enabled for
normal use in environments where security is important.
USERNAME

Each terminal user normally enters a user name at login. His or her user name is any
string of 1 to 12 keyboard characters. Alternatively, you can specify it with the
USERNAME terminal characteristic. The default for USERNAME is the value for
the terminal NAME characteristic.

Setting Up the DECserver 100 and Its Terminals

2-13

A terminal user can, for convenience, enter €RLZ) after the user name prompt at login.

His or her user name then defaults to the value for the terminal’s NAME characteristic.
NOTE

You can specify a user name only with the SET TERMINAL command. The user name is not a part of the permanent database and

cannot be specified using the DEFINE TERMINAL command.
TYPE

There are four terminal types, and each functions differently while in local mode.

e HARDCOPY
- for use with paper-output terminals. The delete key echoes deleted
-

characters between backslashes (\). The Digital LLA120is an example of a hardcopy
terminal.

e SOFTCOPY - for use with video terminals. The delete key erases deleted characters
from the screen, and moves the cursor one character to the left. All server displays
build upward line-by-line from the bottom of the screen. The Digital VT52, for
example, is a softcopy terminal.
e ANSI - for use with video terminals supporting ANSI escape sequences. The delete
key functions as in SOFTCOPY terminals. However, the screen clears before all
terminal displays, and the displays build downward line-by-line from the top of the

screen. Terminals in the Digital VT100 and VTZOO series can be set up as type
ANSI.
* OTHER - for use with noninteractive terminals (for example, output-only printers).
DECserver 100 commands cannot be entered at TYPE OTHER terminals, and
DECserver 100 messages are not displayed. The Digital LA50is an example of a
TYPE OTHER terminal.

The default type is HARDCOPY.
NAME
The entry for the NAME characteristic is the terminal name. You can specify the

user’s name, the location of the terminal, or any other convenient identification. The
NAME appears in the SHOW TERMINAL display. It can be up to 12 characters
lcmg, and there is no default name.
BROADCAST

With BROADCAST set to ENABLED, the terminal user receives local broadcast
messages sent from the other DECserver 100 terminals. The messages appear while
the terminal is in either local or service mode. You can disable BROADCAST to

prevent incoming messages from overwriting data on the terminal screen. The default
is ENABLED.

2-14

DECserver 100 Terminal Server Operations Guide

MESSAGE CODES

Each DECserver 100 message has a message code. For example, in the following error
message, the number 701 is the message code.
Local

-701~-

Command

syntax

error

If you define MESSAGE CODES as DISABLED, the message code does not appear.

The default is ENABLED.

VERIFICATION

Verification messages are informational notes sent to the terminal when the user
initiates, terminates, or switches sessions. If a lot of switching is done, you can enter

DISABLED for VERIFICATION, and these informational messages do not appear.
This does not affect the receipt of warning and error messages. The default for VERIFICATION is ENABLED.

2.6 DECservgr 100 Initialization
You can initialize the DECserver 100 in one of two ways: by electrical power-up, or by

entering the INITIALIZE command. The following sequence occurs at initialization.
When you enter the INITIALIZE command, the sequence begins at step 1. When you

power-up the server, the sequence begins at step 3.
1.

The DECserver 100 sends warning messages to users at regular intervals. These
indicate that initialization is about to begin.

The server disconnects all active terminals from network services.

The server déiagnastic self-test executes (refer to Section 4.1).

A load host down-line loads the operational server software, and the server becomes operational.

The user presses

several times, and, depending on the terminal’s characteris-

~ tics, one or more of the following occurs:

a. If AUTOBAUD is enabled at a terminal, the server adjusts the terminal port
for the terminal’s speed, character size, and parity.

b. If LOGIN is enabled at a terminal, a pound sign prompt (#) appears at the
terminal with an audible beep signal.

c. Except when a dedicated service is defined for a terminal, the user name
prompt (Enter username>) appears, and the user types his or her user name.
d. With AUTOCONNECT enabled, connection to a preferred or dedicated service is carried out.

e. If no dedicated or preferred service is defined, the local mode prompt (Local>)
appears.

Setting Up the DECserver 100 and Its Terminals

2-15

Options for the INITIALIZE command alter the initialization process outlined above:
A

® You can suspend the beginning of initialization for a specified number of minutes.
The server transmits warning messages at regular intervals to alert terminal users.
(INITTIALIZE ABORT allows you to cancel the initialization.)

* You can inhibit the CONNECT command and the AUTOCONNECT function at
each terminal. This option is useful if you want the terminals to remain in local
mode when initialization is completed.
* You can cause the server to execute nonstandard diagnostic self-tests.

Chapter 5 contains the command description and symtax for the INITIALIZE command.

2.7 Setting Characteristics to Factory Specifications
The software reset feature permits you to change the data in the permanent database

to Digital factory specifications. This feature is useful, for example, if you forget the
passwords you set up with the DEFINE PRIVILEGED PASSWORD command or the

DEFINE LOGIN PASSWORD command. Digital recommends that software reset be
executed only when absolutely required.

To cause a software reset, locate the software reset (S1) button on the DECserver 100
hardware unit. Simultaneously press this button while you remove and reinsert the
power cord. An immediate server initialization occurs; all permanent and operational

database parameters are reset to factory specifications.
Following the reset procedure, the privileged password is ‘“‘system’, and the login
password is “‘access’. To maintain security, you should change these passwords (see
Sections 2.2 and 2.3).

2.8 Setting Up a Printer
You can replace a DECserver 100 terminal with an asynchronous, serial printer (or

other nonkeyboard device). This allows DECserver 100 terminal users to obtain hardcopy printouts from network services.

When the printer is installed, it becomes a DECserver 100 terminal; you define
terminal characteristics for it as you do for any attached terminal (refer to Section
2.5). Table 2-3 shows terminal characteristics values that are required to make the
printer operational. Use the DEFINE TERMINAL command to set up these charac-

teristics.

2-16

DECserver 100 Terminal Server Operations Guide

Table 2-3:

Setting Up Terminal Characteristics for a Printer

Characteristic

Value

AUTOBAUD

DISABLED

AUTOCONNECT

ENABLED

CHARACTER SIZE

The operational character size for the printer

DEDICATED SERVICE

The service name for the service node to which the printer is
connected

‘

PARITY

The operational parity for the printer

SPEED

The operational speed for the printer

TYPE

OTHER

After you define terminal characteristics for the printer, log out the printer using the
privileged LOGOUT command. This command moves a copy of the terminal characteristics from the server’s permanent database to its operational database. Thenissue
the CONNECT TERMINAL n command to establish a session between the printer
and the dedicated service.

Here is an example of commands for setting up a printer that you wish to connect to

the service LABTEST. It is installed at terminal port 8 on the DECserver 100.
Local>

DEFINE

TERMINAL

AUTOBAUD

Local>
Local®

DEFINE
DEFINE

TERMINAL
TERMINAL

8
8

SPEED 1200
TYPE OTHER

Local>

LOGOUT

TERMINAL

Local*

CONNECT

Local>»

SHOW

TERMINAL

SESSIONS

DISABLED,

AUTOCONNECT

CHARACTER
DEDICATED

ENABLED

SIZE 8 PARITY NONE
SERVICE LABTEST

TERMINAL

The SHOW SESSIONS display verifies that terminal 8 is connected to the dedicated
service.

If you wish to cnnect this printer temporarily to another service, use the privileged
DISCONNECT and CONNECT commands. For example:
Local>

DISCONNECT

Local>

CONNECT

TERMINAL 8
TERMINAL 8 SERVICE

DEVELOP

These commands connect the printer to the service DEVELOP.

To use the prlnter the terminal users need to know its device name at the service
node. The device name changes when the system manager reboots the service node,
when you initialize the server, and when you connect the printer to the service.

Setting Up the DECserver 100 and Its Terminals

- 2-17

The procedure for determining the printer device name depends upon the operating
system for the service node. As an example, issue the following commands for a

service node with the VAX/VMS operating system. Local> prompts you for DECserver 100 commands which you enter in local mode. The dollar sign ($) prompts you

for VAX/VMS commands which you enter in a service session with the VAX/VMS
system.

Local>

DISCONNECT

SHOW

DEVICES

Local>

CONNECT

DEVICES

SHOW

TERMINAL

When you type the second SHOW DEVICES command, a new LT: name appears.
This is likely to be the current device name for the printer.

When you determine the LT: device name, the terminal users can set up and utilize
the printer as they would any printer on the service.node. For example, the printer
can be allocated by an application process or configured into a printer queue. Refer to
the VAX/VMS documentation for details.

iy,

2-18

DECserver 100 Terminal Server Operations Guide

Managing and Monitoring

As the server ma nager, you normally have responsibility for managing and monitoring

the DECserver 1f D0 and its terminals. This chapter discusses the DECserver 100 commands that you ¢ an use to assist you. Chapter 5 covers each command in more detail.

3.1 Managing the DECserver 100

The commands described in this section help you do the following:
e Ensure that only authorized persons gain access to DECserver 100 facilities.

e Manage the access to service mode for keyboard and nonkeyboard terminals.
¢ Communicate with the terminal users.

e Manage the DECserver 100 from a remote console.

3.1.1 Security Management
The SET PRIVILEGED command gives you privileged status and makes your terminal the privileged terminal (refer to Section 2.1). This command requires the privileged password which helps maintain the security of the server and terminals. For
example, to acquire privileged status with the privileged password, A1B2C3, use this
command:
LLocal
>

SET

Password>

PRIVILEGED

A1BZ2C3
(not echoed)

You return to nonprivileged status by logging out or by entering the SET NOPRIVILEGED command.
Local
>

SET

NOPRIVILEGED

The privileged commands cannot be used until you reenter privileged status with the
SET PRIVILEGED command.
3-1

You can transfer your privileged status from one terminal to another with the SET
PRIVILEGED OVERRIDE command. This is a form of the SET PRIVILEGED com-

mand, and you must know the privileged password. You may wish to use this command, for example, if the privileged terminal becomes nonoperational. Here is an
example using the privileged password A1B2C3.
Local»

SET

Password>

PRIVILEGED
ALIBZC3

(not

OVERRIDE
echoed)

This command makes your current terminal the privileged termmal The former
privileged terminal becomes nonprivileged.

Sections 2.2 and 2.3 discuss how you set up the login and privileged passwords. To
maintain security, change these passwords regularly. Use the SET LOGIN PASSWORD or SET PRIVILEGED PASSWORD command to select a new password. This

password takes effect immediately.

You should also set up the new password with DEFINE LOGIN PASSWORD or
DEFINE PRIVILEGED PASSWORD. The new password then remams in effect eaeh
time the server is initialized.

For example, to change the privileged paaswmd from A1B2C3 to GTHSI9, enter the

following:
Local*

SET

Password>

PRIVILEGED

G7HBIS

Verification>

(not

G7HBI9

PASSWORD

echoed)
(not

echoed)

Local» DEFINE PRIVILEGED PASSWORD
Password>

G7HB8IS9

Verification>

(not

G7HBI9

echoed)
(not

echoed)

Local
»

3.1.2 Service Mode Management
As the server manager, you can control the terminal users’ access to service mode.
Sections 2.4 and 2.5 describe how to use terminal and server characteristics to do this.
You can also use the privileged form of several DECserver 100 commands.

The privileged CONNECT and DISCONNECT commands allow you to control the
connections of a nonkeyboard device (for example, a printer) to network services.
However, these commands do not permit you to connect or disconnect “regular”
interactive terminals.

A mnkeybmrd device takes the place of an interactive terminal. The following notes
apply to a nonkeyboard device:

® The device must be designated as TYPE OTHER before you issue the CONNECT
command (refer to Section 2.5.5).

* Only one session at a time can be active for the device.

3-2

DECserver 100 Terminal Server Operations Guide

ARy,

Connect a nonkeyboard device to a service by specifying its terminal number when
you enter the CONNECT command. For example, to connect terminal 8 to the
service SALES, type the following:
Local» CONNECT

TERMINAL

SERVICE

SALES

You can switch a nonkeyboard device to an alternate service even if it is currently
connected to a dedicated service. To disconnect the nonkeyboard device from SALES,
and connect it to RESEARCH, enter these commands:
TERMINAL 8
TERMINAL 8 SERVICE

Local» DISCONNECT

Local> CONNECT

RESEARCH

As the server manager, you can use the privileged form of the LOGOUT command to
log out any of the terminals. The terminal you specify can be of any type, including
the users’ interactive terminals. The command terminates all service sessions at the
specified terminal. For example, to disconnect terminal 4 from all its sessions, enter
the following:
Local> LOGOUT

TERMINAL

Use caution when logging dut a user’s terminal. When you log out a terminal you
abruptly stop all service sessions and data may be lost.

3.1.3 Communication with Terminal Users

The privileged BROADCAST command lets you send messages to one particular
terminal or to all the terminals. This command can help you manage the server and
terminals. For example, if you change the group codes for the terminals, you can use
BROADCAST to alert the users of the change.

Here is a BROADCAST command that transmits the message, “You can now use the
service RESEARCH”, to terminal 3.
Local> BROADCAST TERMINAL 3

"You

can

now

use

the

service

RESEARCH"

The following command sends the same message to all the terminals.
Local» BROADCAST ALL

"You

can

vnow use

the

service

RESEARCH®

Note that a terminal receives BROADCAST messages only when its BROADCAST
characteristic is enabled (see Section 2.5.5).

Managing and Monitoring

3-3

3.1.4 Remote Management of the DECserver 100
If you are responsible for several DECserver 100 systems, it may be convenient for you
(or the network manager) to manage them all from a central location. The server
software permits you to use DECserver 100 commands at a single remote terminal

rather than at terminals attached to each server.

The terminal, called a remote console, is connected locally to a node on the same

Ethernet as the servers. The node must have DECnet Phase IV software. From the
remote console, you have access to any DECserver 100 and can use the DECserver 100
commands. Figure 3-1 shows a remote console on an Ethernet.

SERVER MANAGER'S

REMOTE CONSOLE
s

DECnet

SERVICE NODE

' SERVICE NODE
s,

r‘L

ETHERNET CABLE

{]

{]
A

'DECserver 100

[

@
oA

TERMINALS

Figure 3-1:

TW120

Server Manager’s Remote Console on an Ethernet

3.1.4.1 Setting Up a Remote Console —

To set up a remote console, use the

network control facility for the node system where the console terminal is attached.

The system manager and the operating system documentation can assist you. For
most operating systems, a single network management cmmmand estabhshes the link

to the DECserver 100.

3-4

DECserver 100 Terminal Server Operations Guide

To disconnect the remote console from the server, you enter another command that
returns you to the node system’s command mode. This command also depends upon

the operating system being used.
As an example of setting up a remote console, here is the procedure for the VAX/VMS
operating system.

Type the following command to gain access to the Network Control Program (NCP).
(The dollar sign ($) is the system prompt.)
$

NCP

When you receive the NCP prompt, enter either the NCP CONNECT NODE or
CONNECT VIA command. Hereis the syntax for each:
CONNECT NODE server-node-name

CONNECT VIA UNA-0 PHYSICAL ADDRESS Ethernet-address

Use the CONNECT NODE command if the node is a load host which has the DECserver 100 configured in its database.
Use the CONNECT VIA command if the server has not been configured in the node’s
database. The system manager can assist you.

When the NCP CONNECT command executes successfully, press
on the terminal. The following message and a pound sign (#) prompt appear (an audible beep
signal accompanies the prompt):
Comsole

connected

(press

CTRL/D

when

finished)

The prompt indicates that the link to the server has been made and you must enter
the login password. Following successful login, you can begin using DECserver 100
commands.

To terminate a remote console session on the VAX/VMS node, enter CRLD. The
service node prompt reappears. Control passes again to the VAX/VMS system.
3.1.4.2 Using DECserver 100 Commands on a Remote Console —

The DEC-

server 100 pound sign (#) prompt appears when you successfully connect the remote
console through any node (regardless of the node’s operating system).
You first enter the DECserver 100 login password.

(The terminal characteristic

LOGIN is always enabled for the remote console.) If it has not been changed, the
password is ‘“‘access’’. Following successful login, the user name prompt (Enter username>) appears, and you are in local mode on the DECserver 100.

Managing and Monitoring

3-5

The remote console is not physically connected to a terminal port on the DECserver

100 unit. This affects some of the DECserver 100 commands that you can enter.
You can issue any DECserver 100 command at the remote console except for the

following:
DEFINE TERMINAL for the remote console

SET TERMINAL for the remote console
SHOW TERMINAL for the remote console

You can, however, issue these three commands for any of the “regular’” terminals.

Information about the remote console does not appear for the following commands
typed at any terminal:

SHOW SESSIONS ALL
SHOW TERMINAL ALL
SHOW USERS

The terminal characteristics for the remote console are fixed and defined as follows:
AUTOBAUD DISABLED
AUTOCONNECT DISABLED

BACKWARD SWITCH NONE
BROADCAST DISABLED

DEDICATED SERVICE NONE

FLOW CONTROL DISABLED

FORWARD SWITCH NONE

GROUP CODES ALL ENABLED
LOCAL SWITCH ~
LOGIN ENABLED
LOSS NOTIFICATION ENABLED

MESSAGE CODES ENABLED
PREFERRED SERVICE NONE

SESSION LIMIT 1
TYPE HARDCOPY
VERIFICATION ENABLED

——

The characteristics SPEED, CHARACTER SIZE, and PARITY are irrelevant for the
remote console.

Here are other notes about DECserver 100 commands for the remote console:
e You can enter the CONNECT command to use network services. However, you can
have only one active session (up to four are possible at the other terminals).

e If you connect to a service node with the remote console, you should not activate
another remote console session from that node.
® You can use privileged commands if you know the privileged password for the SET
PRIVILEGED command.

e Use the fixed local switch character (7) to enter local mode.
Personal computer (PC) file transfers are not supported over the remote console.

3-6

DECserver 100 Terminal Server Operations Guide

3.2 Monitoring the DECserver 100
DECserver 100 SHOW commands enable you to monitor the server, its terminals, and
the interaction among the service nodes. This section discusses what to look for in the
SHOW commands displays. Chapter 5 describes the command syntax for each command. Chapter 5 also has examples of the displays and descriptions of the data fields
in the displays.

3.2.1 SHOW COUNTERS
A counter is a number that shows how many times a certain event has occurred. The
server software keeps track of Ethernet and LAT message transmissions using counters. The SHOW COUNTERS data appears under two headings: Ethernet Counters
and Server Counters.

e Ethernet Counters lists the counters for datagrams sent between the server and all
nodes on the Ethernet.

e Server Counters lists the counters for messages transmitted between the server and
the LAT service nodes.

Two other commands are associated with counters: ZERO COUNTERS and MONITOR. ZERO COUNTERS resets all the LAT counters and Ethernet counters to zero.
MONITOR generates a continuously updated SHOW COUNTERS display. When
you enter MONITOR, a SHOW COUNTERS display appears, and the counter totals
change while the display is on your terminal screen.

Counters can help you estimate DECserver 100 traffic on the network for different

time periods. For example, if you zero the counters at the start of each day, you can
gain information about day-to-day server usage.

Your network manager can use the data to calculate the average utilization of the
Ethernet and the service nodes. Also, the counters can be combined with those from
other servers to calculate the network’s capacity to handle more traffic.

SHOW COUNTERS is also useful for detecting possible network problems. Use the
following guidelines when you examine the SHOW COUNTERS display.
For the Ethernet counters:

e Normally, the counters on the right hand side of the display should be 0 except
those for Block Check Error, Framing Error, and User Buffer Unavailable. These
should accumulate at a rate of less than 2 counts per day. It is normal to experience
some errors when nodes are added to the Ethernet.

e The value for Frames Sent, Deferred should be less then 5% of the value for Frames
Sent.

e The value for Frames Sent, 1 Collision and for Frames Sent, 2+ Collisions should be
less than 1% of that for Frames Sent.

Managing and Monitoring

3-7

For the Server counters:

e The Messages Re-transmitted value should be less than 1/1000 of the value for
Messages Transmitted.

e The Duplicates Received value should be less than 1/1000 of the value for Messages
Received.

e The values for Illegal Messages Rcv’d and Illegal Slots Rev’d should be 0.
Counters in excess of these guidelines may indicate a network problem. Contact your
network manager and refer to Section 4.5.

3.2.2 SHOW NODES
When you enter a specific node name in the SHOW NODES command, the counter
values for that service node appear in the display. The following guidelines apply:

e The Messages Re-transmitted value should be less than 1/1000 of the value for
Messages Transmitted.

* The Duplicates Received value should be less then 1/1000 of the value for Messages
Received.

e The value for Illegal Messages Rcv’d should be 0.
p—

If the SHOW NODES data exceeds these guidelines, contact your network manager.
The Status column in the SHOW NODES display can help you monitor the use of

service nodes. The status indicates how many terminal users are connected to each
node.

3.2.3 SHOW SERVER
You use the SHOW SERVER display when you define server characteristics. You can

also use it as a maintenance tool.
g,

The display for the privileged SHOW SERVER command lists Server Status and

Software Status. It also identifies the load host and dump host.
The numbers for Server Status should be all zeros. A hardware error produces nonzero
values.

A Software Status other then Normal indicates that a fatal bugcheck occurred prior to

the latest power-up of the DECserver 100. The status shows the values for server
system parameters at the time of the fatal bugcheck. It also notes the Ethernet

address of the host that received the up-line dump of the server memory following the
fatal bugcheck.

Refer to the troubleshooting procedures in Section 4.2 if abnormal data appears for
Server Status or Software Status.

3-8

DECserver 100 Terminal Server Operations Guide

3.2.4 SHOW TERMINAL
Three counters in the SHOW TERMINAL display can indicate possible problems.
These are the counters for Framing Errors, Parity Errors, and Overrun Errors. Under
most conditions, all three counters are zero.
If the Overrun Errors value accumulates to more than 1 or 2 per day, you may have

flow control problems. If the terminal supports XON/XOFF flow control, make sure

that this parameter is enabled (refer to the operations guide for the terminal). Also,
set up the terminal characteristic,c FLOW CONTROL, to ENABLED (see Section
2.5.3).

If the counter for Framing Errors or Parity Errors accumulates to greater than about

20 per day, you may have terminal line problems. Refer to the troubleshooting procedures in Section 4.3.

3.2.5 SHOW USERS
The SHOW USERS command is a tool for general monitoring of the terminals’ use.
You can use it to determine which terminals are in use at any time and to identify the
terminal users.

Managing and Monitoring

3-9

—

J—

p—

o—

sommmon,

4
DECserver 100 Troubleshooting

When you troubleshoot the DECserver 100, you try to solve problems affecting the
server and its attached terminals.
A problem can occur as a result of a failure in one of the five network components
shown in Figure 4-1. Each network component is broken down into its constituent
parts in Figure 4-2. These parts can be hardware (represented by the solid-line boxes)
or software (represented by the dashed-line boxes). Refer to these figures as a guide
when you use the information in this chapter.

You can replace some of the components and their parts yourself, or you can call a
Digital representative to replace them for you. Many of the parts must be replaced by
a qualified Digital service representative.

TERMINAL

| DECserver 100

ETHERNET

SERVICE
NODE

DECnet
LOAD HOST
NODE

TW123

Figure 4-1:

LAT Network Components

4-1

This chapter consists of the following sections:
® Section 4.1. suggests initial steps to take when you become aware of a problem.

e Section 4.2. discusses how to troubleshoot problems that involve all the terminals.
These problems may result from a failure in the DECserver 100.

e Section 4.3 discusses how to troubleshoot problems that affect one or more individual terminals, but not all the terminals.

e Sections 4.4 and 4.5 cover problems involving service nodes on the Ethernet network
and the Ethernet interface itself.

® Section 4.6 describes how to use the maintenance services provided by Digital.
Sections 4.2 through 4.5 list the possible causes of a problem and the corrective action
required to solve the problem.
e

—

4.1 What To Do First
To begin troubleshooting, find out first if the problem affects all the terminals or only

some of the terminals.

e When the problem involves all the terminals, do the following:
1.

If message number 913 appears on the console terminal, go no further in this
sequence of steps. Refer directly to Section 4.2.5.

If the terminal users can still enter DECserver 100 commands at their termi-

nals, have them finish their active sessions. Then have them log out their
terminals. If they cannot use their terminals, go on to step 3.

Initialize the DECserver

100 by disconnecting and then reconnecting the

server’s power cord. (This is a “power-up”’ of the server.) The server executes its

diagnostic self-test. After about 20 seconds, the green light on the server: stays
off, blinks, or stays on.

If the green light stays off, go on to Section 4.2.1. If the light blinks go, to

Section 4.2.2. If the light stays on, refer to Sections 4.2.3 through 4.2.6.
o If the problem affects fewer than all the terminals, go on to Section 4.3

* If you become aware of a problem because an error message appears at a terminal,
find the error message in Appendix A. The text in Appendix A refers you to a

troubleshooting procedure in this chapter.
The diagnostic self-test is an important feature of the DECserver 100. During the selftest, internal software checks the state of a number of hardware components. The
green light on the server shows the result of the test.

When a condition generates message number 913, the server initializes itself automatically.

4-2

DECserver 100 Terminal Server Operations Guide

TERMINAL |

TERMINAL

CABLE

HARDWARE
- UNIT

DECserver
100

Terminal Component Parts

TERMINAL

[DECserver 100 }

CABLE

TRANSCEIVER

HARDWARE

H TRANSCEIVER }-——‘

S— 0
i

1 TERMINAL’S PORT |

SERVER

SOFTWARE

EHAnAcremmch"f“ =1

ETHERNET

UNIT

| SERVER
B

i
e
I

| CHARACTERISTICS |

DECserver 100 Component Parts

DECserver
100

ETHERNET CABLE,
| REPEATERS,

SERVICE
NODE

CONNECTORS
Ethernet Component Parts

ETHERNET

TRANSCEIVER

I'rnmsceweal
CABLE

I ETHERNET l
INTERFACE

Isr—:nvsce NoDE |
COMPUTER
i

Service Node Component Parts

§ SERVICE NODE|

| SOFTWARE
A

‘ |

TRANSCEIVER

ITHANSCEIVERI
CABLE

I ETHERNET

LOAD HOST
DATABASE

|
|

INTERFACE

l DECnet

LOAD HOST
-

ETHERNET

- ""-d

DECnet Load Host Component Parts

”““u“

i
!

LOAD HOST

SOFTWARE

-y
o one awwn

swed

TW124

Figure 4-2:

Breakdown of LAT Network Components

DECserver 100 Troubleshooting

4-3

After completion of a self-test, you can reinitialize the DECserver 100 by pressing
on the console terminal. You need not power-up the server. This reinitialization
works if the problem involves either down-line loading of the server software or a
transceiver malfunction.
NOTE

Have a console terminal defined. The console terminal (the default
terminal port is port 1) receives status messages that make the troubleshooting process much easier. For server installation, the console
terminal must be configured to operate with a speed of 9600 bps and a
character size of 8 bits with no parity. Following installation, you can
use the DEFINE TERMINAL command to set up the console terminal with other values for speed, character size, and parity.

4-4

DECserver 100 Terminal Server Operations Guide

4.2 Problems Affecting All Terminals
-

This section describes what to do after you initialize the server for problems that
affect all the terminals.

The green light on the DECserver 100 unit is in one of three states approximately 20

seconds after you initialize the server.

e Off - the server has no power or has a serious hardware problem (see Section 4.2.1).

e Blinking - the server found a nonfatal problem during its self-test (see Section
4.2.2).

e On continually
- the server did not find any errors during its selfitest (see Sections
4.2.3 through 4.2.6).

—

4.2.1 Server Green Light Off
Problem

Power is not reaching the DECserver 100.

Correction Secure the power cable at the server and wall outlet.

—
"

the server power cord into another outlet. If no power is available, check

—

the circuit breaker for the outlet.

Correction Check the wall outlet using another appliance or light; or plug

—

Correction Ensure that the voltage select switch is set to the correct

voltage for your country (120V for North America). Refer to the DEC-

—

server 100 Terminal Server Site Preparation/Hardware Installation Guide
to determine the correct setting.

Correction Determine if the fuse has blown on the DECserver 100 unit. If

necessary, replace the fuse as shown in the DECserver 100 Terminal

Server Site Preparation/Hardware Installation Guide.

—
7

Correction Replace a defective server power cable with a new cable (you
can use the power cord for a VT'100 terminal).

Problem

A hardware error has occurred which makes the DECserver 100 nonoperational. The server and the terminals cannot function.

Correction There is no corrective procedure for this problem. Return the

unit to Digital for service or replacement (see Section 4.6).

DECserver 100 Troubleshooting

4-5

4.2.2 Server Green Light Blinking
If you see a blinking green light after power-up, it indicates the server has a nonfatal

problem detected during self-test. The primary problem indicator in this case is the
message that appears on the server’s console terminal (terminal 1 by default). The

message has this format:
Local

-911-

Server

WARNING

status

nnnns

Non-fatal

terminal

hardware

status

error

detected

nnh

nn
g

The message contains a status code nnnn for the server itself and a status code nn for
each of the server’s eight terminal ports. For both codes, the n’s are either 1 or O.

Section 4.3.2 discusses the terminal status codes.
The location of the number 1 in the server status code tells you what error was

detected. (Note that there can be from 1 to 4 ones in the 4-digit code.)
4.2.2.1 nnn1 - Server Parameters Checksum Error
Problem

The server characteristics in the server’s permanent database have been

damaged. The factory set defaults are now in effect.

Correction Reenter the desired server characteristics using the DEFINE

SERVER command (see Chapter 5). Reinitialize the server with the INITIALIZE command or a power-up to bring these parameters into effect. If

this action fails to correct the problem, the memory used to store the
characteristics is faulty. You can continue to use the server with the
factory default characteristics, or see Section 4.6 for information about
returning the unit to Digital.
4.2.2.2 nn1in - Hardware Revision Level Checksum Error

Problem

'The server’s nonvolatile memory is faulty.

Correction There is no correction for this problem. You can continue to
use the server. However, performance enhancements based upon hardware revisions are not in effect. This means that the DECserver 100 may

run slightly slower than it would otherwise. If you wish to return the unit

to Digital, refer to Section 4.6.
With this problem, asterisks (*) appear in the hardware revision field in

the SHOW SERVER display.

—

4-6

DECserver 100 Terminal Server Operations Guide

[

4.2.2.3 ninn - Ethernet Loopback Error — The following error message appears on
the console terminal:
Local

-910-

Problem

Imade

load

not

attempteds

networkK communicationerror

There is a faulty or loose transceiver cable.

Correction Check the cable that runs from the DECserver 100 unit to the
transceiver, DELNI, or Etherjack. Be sure the cable is securely connected
at both ends. Check the cable for any signs of damage.
If you have an H4080 turnaround connector, you can verify the operation
of the transceiver cable. Replace the transceiver with the H4080 and then
initialize the server by entering CRUP). If the blinking light and the nlnn
status persist after the next self-test, the cable is likely to be at fault. If

the green light glows steadily, the transceiver or Ethernet tap may be
malfunctioning (see below).
NOTE

When the green light glows steadily with the H4080 replacement, the server attempts to down-line load the
server software. Since the H4080 is not connected to the
network, the down-line load fails.

If you do not have an H4080 turnaround connector you should connect the
server to a transceiver cable that you know is working. Make sure all cable
connections are secure, and then press CTRUP). If the server still shows a

status of nlnn, see Section 4.6 for information about services offered by
Digital to assist you in problem resolution. If the green light glows steadily, you should replace the original transceiver cable or use the cable you
know to be workable.

Problem

The transceiver is faulty.

Correction If you have an H4080 turnaround connector you can verify the
operation of the server’s transceiver interface and transceiver cable. Remove the cable from the H4000 transceiver and connect it to the H4080.

Initialize the server with

to start its self-test.

The following results occurring together indicate that the transceiver or
the Ethernet tap are faulty: (1) the green light on the DECserver 100 is
steady rather than blinking, (2) the console terminal displays the messages below at approximately 30 second intervals:
Local
Local

-902-912-

Waiting for Imade Load
Load failures timeout

DECserver 100 Troubleshooting

4-7

If you do not have an H4080 turnaround connector, connect the DEC-

server 100 to a known good transceiver. Press €®UP). If the green light
stays on, the original transceiver or its Ethernet tap is likely to be faulty.

To determine which, perform the following procedure.
NOTE

Digital does not support all non-Digital transceivers. Refer to the DECserver 100 Software Product Description

for information about supported transceivers.

Problem

The Ethernet tap is bad.
Correction Move the transceiver to a new location and reinstall. Press

. If the green light glows continuously, the new Ethernet tap is good,
and the DECserver 100 will work normally. If the problem persists, the

transceiver is probably bad. Replace it with another transceiver and retry.

4.2.2.4 1nnn - Ethernet Heartbeat Error

Problem

The transceiver is a non-Digital transceiver that was made to conform to
the Ethernet Version 1.0 specification. Some manufacturers’ transceivers

conform to this earlier Ethernet specification which did not include the
heartbeat signal. All Digital transceivers conform to Version 2.0 and sup-

ply this signal.

Correction If you are using a non-Digital transceiver, you should disable
the server’s heartbeat detection action by defining the server characteris-

tic, HEARTBEAT, as DISABLED. Enter the DEFINE SERVER
HEARTBEAT DISABLED command (see Chapter 5). Reinitialize the
server to make this change operational.
|

NOTE
o

The blinking green light and status 1nnn still appear even

with HEARTBEAT disabled. However, the server will

function normally.
Problem

There is a transceiver fault or a cabling problem.

Correction Refer to Section 4.2.2.3.
S

LAY,

DECserver 100 Terminal Server Operations Guide

4.2.3 No Console Messages
The console terminal has no display when the server initializes.
Problem

There is no console terminal defined for the port to which the terminal is
physically connected.
Correction Refer to Section 2.4 to set up a console terminal. Then check
your setup by entering the SHOW SERVER command to list the console
port. Insure that the terminal is physically connected to that port on the
DECserver 100 unit.

Problem

The console terminal is faulty.

Correction Refer to Section 4.3 for troubleshooting steps for problems
that affect individual terminals.
Problem

The console terminal’s characteristics are not set up correctly.
Correction Refer to Section 4.3 for troubleshooting steps for problems
that affect individual terminals.
NOTE

For server installation, the console terminal must be configured to operate with a speed of 9600 bps and a character size of 8 bits with no parity. Following installation,

you can use the DEFINE TERMINAL command to set
up the console terminal with other values for speed, character size, and parity.

DECserver 100 Troubleshooting

4-9

4.2.4 Down-line Loading Problems
If you have a down-line load problem, the user name prompt (Enter username>) does

not appear on the terminals. Also, all the terminals are nonresponsive; they do not

respond to your keyboard entries.

Two sequences of 900 series messages on the console terminal indicate down-line
loading problems. Each is covered in the following sections.

NOTE
P

Have event logging enabled for events 0.3 and 0.7 on all DECnet load

hosts that may be down-line loading the server. Refer to the DECnet
load host documentation for information about event logging, or see

the system manager for the DECnet load host.

4.2.4.1 Down-line Load Starts, Then Fails — The following sequence of message
appears on the console terminal at 30 second intervals:

——

r—

Local

-8902-

Waiting

for

imasge

from

host

lLocal

-8903-

Local

~912-

Load

Problem

failure:

load
load-host-address

timeout

The directory with the software image on the load host is not defined. For
example, on a load host running VAX/VMS (V4.0), the directory with the

DECserver 100 software image, MOMS$LOAD, is not defined.

Correction Have the system manager execute the commands required to

define the directory. For VAX/VMS (V4.0), he should enter the following

statement in the system startup file on the load host, and then execute

the command itself.
$

Problem

DEFINE/SYSTEM/EXEC/NOLOG MOM$LOAD SYS4SYSROOT: [DECSERVER]

The DECserver unit has been incorrectly configured on the load host, or
the server software has not been installed properly.
Correction Perform the procedures outlined in Section 4.2.4.2.

Problem

The server characteristicc SOFTWARE, has been changed. The new file

name for the server software image is not defined on the load host.

Correction Normally the server SOFTWARE characteristic should be
defined as PSO801ENG. Section 2.4 tells you how to reset SOFTWARE to

PS0801ENG. The load host system manager can ensure that the file name
on the load host is correct. For example, the file specification for the
server
software
on
a
VAX/VMS
(V4.0)
load
host
should
be

MOMSLOAD:PS0801ENG.SYS.

4-10

DECserver 100 Terminal Server Operations Guide

4.2.4.2 Down-line Load Does Not Start — The following sequence of messages
appears on the console terminal at 30 second intervals:
Local
Local

-912-902-

Load failure, timeout
Waitindg for imasge load

The load host does not contain a node database entry for the server, or

Problem

does not contain the proper node information.

Correction Verify that: (1) the load host contains a node entry for the
server, (2) all information pertaining to down-line loading is correct.
For example, for a VAX/VMS load host, ask the system manager to do
the following:

Execute the command file DSVCONFIG.COM in the directory with
the logical name SYS$SYSROOT:[DECSERVER]. This is the procedure that he or she uses to configure a DECserver 100 in the host’s
database.

Enter number 1 in the Menu of Options. This option displays the
DECnet address, DECnet node name, Ethernet address, and up-line
dump file for the server. For example:

DECret Address ! DECrnet Node Name| Ethernet Address
ho

saee

wews

pe—

wens

08-00-2B-00-16-AC

LATA

i Dume File
s

npgon

PSDMP1GAC.5Y

If the information is wrong, the system manager can correct it by
running DSVCONFIG.COM and choosing item 2 in the Menu of
Options.

Enter the following NCP command using the server’s DECnet node
name. This command lists the server’s characteristics stored in the
host’s database.
NCP:>SHOW NODE LAT4 CHARACTERISTICS

Here is an example of the display that this command generates:
Node

Unlatile

Hemote

node

Service

circuit

Hardware

lLead
Dump

Characteristics

address

file
file

55,126

Z-0CT-1984

16:40:53

(LAT4)

UNA-O

OB-00-2B-00-16-A4C

SYS4SYSROOT«[DECSERVERIPSOBOIENG.SYES
SYS$SYSROOT: [DECSERVERIPSDMPIGAC . 5Y5

If the information in step 3 is complete and correct, the server is configured properly on the load host. If it is not, the system manager can make
corrections using DSVCONFIG.COM. He or she may also need to use
NCP commands to correct the “Load file” file name.

DECserver 100 Troubleshooting

4-11

Problem

The directory with the software image on the load host is not defined. For
example, on a load host running VAX/VMS (V4.0), the directory with the
DECserver 100 software image, MOMS$LOAD, is not defined.
Correction Have the system manager execute the commands required to
define the directory. For VAX/VMS (V4.0), he should enter the following
statement in the system startup file on the load host, and then execute
the command itself.

AL,

$DEFINE/SYSTEM/EXEC/NOLOG
MOM$LODAD SYS4SYSROOT : LDECSERVER]

Problem

The server’s DECnet load host is not available.
Correction Check to be sure the server’s DECnet load host is available on
the network. Be sure that the load host has the network properly turned
on and that the Ethernet circuit is in the ON state. Use the load host’s
Network Control Program (NCP) as documented in the load host’s DECnet documentation to verify that the network is up, that the Ethernet
connection is on, and that service is enabled. An example of the NCP
commands necessary to perform these checks and the NCP output is
shown below:

Node

EXECUTOR

VYolatile

Executor

Status

node

Phvsical

address

NCP>SHOW

ACTIVE

Line

19-AUCG-84

13:12:00
POV,

0O
AA-QO0-04-00-06-10

LINES

VYolatile

STATUS

Status

19-AUG-84

13:12:15

State

UNA-O

NCP>SHOW

Active

4,6(BOSTON)

State

Active

STATUS

NCP:>SHOW

ACTIVE

Circuit

CIRCUITS

Yolatile

STATUS

Status

19-4A4UG-84

13:12:25
sy,

Circuit

UNA-O

State

0 i

Loorback

Addacent

BlocH

Name

Node

S1ze

4.,36(LABOL)

5706
G

4-12

DECserver 100 Terminal Server Operations Guide

NCP=5SHOW
flmtiue

ACTIVE

Circuit

CIRCUIT

CHARACTERISTICS

Yplatile

Characteristics

UNA-O

State

Service

enabled

Designated

router

4.1

Cost
Router

Mello

Priority

15
=

AdJacent

Problem

timer

Tvre

Listen

(TWO)

node

timer

=
=

Ethernet

4,1

(TWO)

The server’s DECnet load host is not on the same Ethernet.
Correction Have the network manager assign one of the nodes on the

server’s Ethernet
to be a load host for the DECserver 100. Have the load
host’s system manager add the server to his database by running the
DSVCONFIG program.
Correction Reconfigure the network to ensure that the load host is on the

same physical Ethernet as the server.
Problem

Transmissions between the DECserver 100 and the load host fail because
of Ethernet circuit problems.

Correction Have the system manager of a DECnet Phase IV node execute

the NCP LOOP CIRCUIT command with the DECserver 100 as the target node. The LAT Network Manager’s Guide describes the LOOP CIRCUIT command. The NCP facility shows the results of the loopback test

at the DECnet node.

DECserver 100 Troubleshooting

4-13

4.2.5 Message Number 913 Appears
If message number 913 appears on the console terminal, it means that the DECserver

100 detected an internal fatal error (fatal bugcheck).
A software problem, or bug, is likely to cause only intermittent fatal bugchecks of the

DECserver 100. Your unit may operate again for a period of time and then fail again.
If there is more than one server on the Ethernet, the bug is likely to affect all the
units.
If the fatal error was a hardware error, the problem probably affects only one of

several DECserver 100 units. The hardware problem may be intermittent and only
occasionally affect the unit.

After a fatal bugcheck, the server automatically executes its self-test and requests a
down-line load of the server software. If the green light is off or blinking after the self-

test, go to Section 4.2.1 or 4.2.2. Otherwise take the following steps.

Problem

A fatal hardware error has been detected.

Correction There is no corrective procedure for this problem. If the fail~ures happen often enough to be disruptive, return the unit to Digital and

install a replacement. Record the values for the five parameters in the 913

sy,

error message. Forward this information and the server up-line dump file

to Digital (see Section 4.6). Up-line dumping after a fatal bugcheck is

discussed below.

If the replacement unit works correctly, it is likely that a hardware error
caused the first unit to crash.

Two nonstandard self-tests can help you confirm a hardware failure in the
original unit. If you can enter commands at a terminal, execute these

tests by issuing the following INITIALIZE commands:
s

INITIALIZE DIAGNOSE FULL
INITIALIZE DIAGNOSE FULL COUNT number

Chapter 5 has the complete command description for the INITIALIZE
command.

Use the first command to check for a hardware error that causes a crash
each time you use the server (nonintermittent error). Use the second to

check for intermittent errors. The green light on the server shows the
result in the same manner as for the standard self-test.
O

The self-test for the first command takes about 90 seconds. The length of
the self-test for the second command depends on the value you specify for
number. When you increase number by 1, you add about 90 seconds to
the length of the test. For example, a value of 320 for number, generates a

test of about eight hours duration.

4-14

DECserver 100 Terminal Server Operations Guide

Problem

po=

A fatal software error has been detected.

Correction There is no corrective procedure for this problem. Record the

values for the five parameters in the error message. Send this data and
up-line dump file to Digital (see Section 4.6).

A fatal bugcheck automatically causes an up-line dump of server memory

to an appropriate host node. If you have several dump hosts defined, you
can determine the host that received the up-line dump by typing the
privileged SHOW SERVER command. The Ethernet address of the

dump host appears in the display.

The file name of the dump file on the host is:

PSDMPnnnn.SYS

po-

example, a DECserver 100 with Ethernet address 08-00-2B-00-16-AC

.SYS on a VAX/VMS dump host.

If error message number 914 appears on the console terminal, the up-line
dump is not successful. There may be Ethernet problems inhibiting
transmissions between the server and the up-line dump host. Refer to

—

Here nnnn are the last four digits of the server’s Ethernet address. For

generates a dump file at SYS$SYSROOT:[DECSERVERIPSDMP16AC

Section 4.5

DECserver 100 Troubleshooting

4-15

4.2.6 Terminal Port or Terminal Hardware Problems

—

If the situations discussed in Sections 4.2.1 to 4.2.5 do not apply, the behavior of the
terminals is the primary indicator for troubleshooting.
Problem

The terminals exhibit one or more of the following kinds of behavior:

e The terminals have no display, and do not respond to keyboard entries.

e The terminals have a screen display but are nonresponsive.
e Not all the characters appear on the terminal screens.
* Nonsense characters appear on the terminals.

Correction Go to Section 4.3 and carry out the troubleshooting proce-

dures for individual terminals. If you solve the problem for one of the
terminals, apply that solution to all the terminals.

vy,

session

4-16

DECserver 100 Terminal Server Operations Guide

4.3 Problems Affecting Individual Terminals
This section describes troubleshooting procedures to take when you experience a
problem that appears to affect only some of the server’s terminals.
4.3.1 Terminal Display Is Wrong
Refer to Table 4-1. Locate the text that describes the behavior of the terminal. Go

down the list of possible problems, in order, and then to the problem number listed for
each. Carry out the corrective action described in the section that addresses the
problem.
If you cannot correct the problem, refer to Section 4.6 for information about services
offered by Digital for problem resolution.
Problem 1

The terminal is receiving no power. The terminal’s power indicator is
off.
Correction Be sure the terminal is plugged into an outlet that has
power. Check the power switch position to be sure the terminal is on. If
the terminal has a fuse or circuit breaker, try replacing or resetting it.
On most terminals, if you fail to see the cursor after approximately one
minute, you can assume that the terminal either has no power or is
faulty.

Problem 2

The terminal is faulty.

Correction Switch the terminal to its off-line mode (refer to the terminal operator’s guide). If the problem behavior persists when you enter
characters, the terminal is probably faulty.
Correction If possible verify the operation of the terminal at another
location. Try to use the same terminal characteristics when performing
this operation.

Problem 3

There is a loose or faulty terminal cable.
Correction Be sure the terminal cable is secure at both the terminal
server and the terminal. If the cable is made of several sections, be sure
all junctions are secure. Inspect the cable for any cuts or crimps. If the
cable is not loose or damaged, try another terminal cable.
NOTE

Be sure to follow the EIA cabling recommendation for
the type of cable you are using. In particular, do not
exceed the maximum allowable length. Refer to the
DECserver 100 Terminal Server Site Preparation/Hardware Installation Guide.

DECserver 100 Troubleshooting

4-17

Table 4-1:

Terminal Behavior and Possible Problems

Problem

Behavior

No display and

nonrespon-

sive

Problem

Number

No power to terminal

Terminal speed set incorrectly

Terminal parity or character size set incor-

Loose or faulty terminal cable

Faulty terminal

rectly
O

Faulty terminal port on server

Dedicated service not available

Flow control disabled

Terminal failing to autobaud

-3

Terminal parity or character size set incor-

Not all characters displayed

rectly

Nonsense

characters

dis-

Faulty terminal

played

Loose or faulty terminal cable

Terminal speed set incorrectly
O

Terminal parity or character size set incorrectly

Terminal failing to autobaud

A working terminal no longer

Faulty terminal

Faulty terminal port on server

Loose or faulty terminal cable

responds

Dedicated service not available

Faulty terminal port on server

Terminal input speed set incorrectly

4-18

DECserver 100 Terminal Server Operations Guide

Problem 4

Correction Following the procedure described in the terminal opera-

tor’'s guide, set the terminal speed to match the speed specified in the

server’s database; or modify the server’s database to match the terminal’s speed. The server supports the following speeds — 75, 110, 134,
150, 300, 600, 1200, 1800, 2000, 2400, 4800, 9600, and 19200 bits/second.
If your terminal cannot be set to one of these speeds, you will not be
able to use the terminal with the DECserver 100 terminal server. If you

intend to use the autobaud feature with the terminal, the input and

The terminal speed is set incorrectly.

output speeds of the terminal must be set to the same setting (see
Section 2.5.2).

Problem 5

The terminal parity or character size is not set correctly.

Correction Following the procedure described in the terminal operator’s guide, set the terminal parity and character size to match the

tively, modify the server’s database to match the terminal’s character

| |

character size and parity specified in the server’s database. Alterna-

size and parity. The server supports odd, even, and no parity terminals
and character sizes of 7 and 8. If your terminal cannot be set to one of
these parity and character size settings, you will not be able to use the

terminal with the DECserver 100. If you intend to use the autobaud
feature (see Section 2.5.2) with the terminal, the parity and the character size settings of the terminal must be:

e 8.-bit character size and no parity

e 7-bit character size and even parity

—

If you cannot set the terminal to one of these settings, the terminal

cannot be used with autobaud. You must set up the speed, character
size and parity for the terminal port to match those for the terminal
itself.

NOTE

|
ko
—
wod
gp—

The DECserver 100 does not support terminals using
mark or space parity. Older Digital terminals, such as
the LA36, may require setting up with jumpers to operate with the server. Refer to the terminal operator’s
guide for details.

DECserver 100 Troubleshooting

4-19

Problem 6

The terminal is failing to autobaud.
Correction If the terminal is not properly set up, the server will be

unable to autobaud the terminal. At an operable terminal, enter the
SHOW TERMINAL command for the suspect terminal. See if the
problem terminal is set up as an autobaud terminal. If autobauding is
used, the terminal must be set up in one of the following configurations:

¢ Character size 8 and parity none or character size 7 and parity even
e Input and output speed (no split speeds allowed) set to: 75, 110, 134,
150, 300, 600, 1200, 1800, 2000, 2400, 3600, 4800, 9600, or 19200

bits/second.

Problem 7

The dedicated service is not available.

Correction If a terminal has a dedicated service and that service is not
available, the terminal will appear to be nonresponsive. Use another
terminal to verify if a dedicated service is set for the problem terminal.
If one is set, verify that the service is available. If the service is avail-

able verify that the problem terminal and the service have a common

sy,

group code enabled.
Problem 8

Flow controlis disabled
Correction Set the FLOW CONTROL characteristic for the terminal

to ENABLED using both the SET TERMINAL and DEFINE TERMINAL commands (refer to Chapter 5). This puts flow control in effect at

the terminal’s port on the server. Ensure that the flow control charac-

ters XON (CTRL/Q) and XOFF
CTRL/S
) are enabled at the
terminal itself. (Refer to the terminal operator’s guide.)
Problem 9

The terminal port in the server is faulty.
Correction Verify that the port hardware is faulty. Plug a loopback

sy,

connector in the terminal’s rear panel jack. Enter the TEST TERMI-

NAL LOOPBACK command using the faulty terminal’s number.
(Since you must disconnect a terminal to install the loopback connec-

tor, you cannot execute TEST TERMINAL LOOPBACK for the termi-

nal you are using.) Check the error counters. If the error counters are

nonzero, then the port is faulty. Continue using the server with the

faulty port, or return the DECserver 100 to Digital (see Section 4.6).
NOTE

When you use the TEST TERMINAL LOOPBACK
command, the input and output speeds for the terminal
port must be the same.

4-20

DECserver 100 Terminal Server Operations Guide

4.3.2 Blinking Green Light on Server

When the green LED on the server blinks after power-up, error message number 911
shows the results of the automatic server self-test (refer to Section 4.2.2). In the error
message, a 2-digit code indicates the hardware status of each terminal port. (The
leftmost 2-digit code is the status code for terminal port 1; the rightmost for terminal
port 8.)

Frequently, terminal port hardware errors involve two terminals connected to adjacent ports on the DECserver 100. Because of this, nonzero terminal status codes may
appear in pairs.

If a “1” appears in the status code for a terminal (regardless of the 4-digit server
code), you have one of the following possible problems.

Problem

A status of nl indicates a checksum error. The characteristics for the

indicated terminal no longer pass the internal checksum test. The factory
specified defaults are in effect.

Correction Use the DEFINE TERMINAL command to again set the

terminal characteristics values to those you choose.

Initialize the server with a power-up. If the same error occurs, you can

continue to use the server with the factory specified terminal characterisor return the server for repair or replacement as described in Section
tics,
4.6.

Problem

A status of In indicates a terminal port hardware error.
Correction There is no corrective procedure for this condition. You can
continue to use the server with the bad terminal port or return the server
for repair or replacement as described in Section 4.6.

DECserver 100 Troubleshooting

4-21

4.3.3 PC File Transfer Fails
A terminal user can operate a personal computer (PC) as a DECserver 100 terminal.

He or she can use the server to transfer files to and from service nodes. A file transfer
can fail if the terminal or service node is set up incorrectly.

»Problem

Terminal characteristics are set up incorrectly.

Correction Use the SET TERMINAL command to eliminate all special
characters in effect for the terminal. The following terminal characteristics should have the value NONE:

BACKWARD SWITCH

FORWARD SWITCH

LOCAL SWITCH
Set the following terminal characteristics to DISABLED:
BROADCAST
FLOW CONTROL
LOSS NOTIFICATION

In addition, character size must be set to 8 for file transfers.
Following the file transfer, you can use SET TERMINAL to reset these
characteristics to their former values.
Problem

The service node terminal characteristics are set up incorrectly.
Correction Refer to the service node or PC documentation for information about setting up characteristics for file transfers. For example, on a

VAX/VMS (V4.0) service node, use the following command to set up the
characteristics (the command here is continued to a second line):

$ SET TERMINAL /PASSALL/NOHOSTSYNC/NOTTSYNC/NOBROADCAST ~% /JEIGHTBIT/NOWRAP

e—

4-22

DECserver 100 Terminal Server Operations Guide

4.4 Problems Involving Service Nodes
Problems can occur which involve the interaction between the DECserver 100 and one

or more service nodes. If the same problem appears to involve a number of service
nodes and more than one server, it may be an Ethernet malfunction (refer to Section
4.5). However, if the problem occurs during communication with a particular service,
it is likely to be associated with a service node’s hardware (including its Ethernet
interface), or the service node LAT software.

A terminal user often becomes aware of service node problems when error messages

appear. The messages tell why a connection cannot be established or why a service
session has been terminated.

4.4.1 Message Timing Problem
An error has occurred involving the timing of messages transmitted between the
DECserver 100 and a service node. One of the error messages in the following groups
may appear:

Local

-201-

Connection

No
Local

-206-

Connection
No

Problem

response

name

within
to

name

within

not

established

timeout

pPeriod

terminated
timeout

pPeriod

The service node exceeded a timeout limit.

Correction Attempt to reconnect to the service. This condition usually

means that the service node has crashed, or is otherwise unreachable. You
can check its status by entering the SHOW NODES command with the
node name. Report the problem to the system manager of the service
node.
Local

-224-

Connmection
Circuit

Local

-264-

Connection

Circuit

Problem

timer

name

not

out

established

rande

name

terminated

out

rande

The server circuit timer value is out of the range specified by the service
node’s system manager.

Correction Determine the correct circuit timer range. Enter the SET
SERVER CIRCUIT TIMER command to reset the timer value (refer to
Section 2.4.1). If this solves the problem, enter the new timer value with
DEFINE SERVER CIRCUIT TIMER. This command places the new
value in the permanent database.

DECserver 100 Troubleshooting

4-23

4.4.2 LAT Protocol Errors
A service node or the DECserver 100 detected messages that violate the LAT protocol.
An error message in the following groups may appear:
Local

Local

-202-

-207-

Conmnection

not

Protocol

Connection

name

Communication

Problem

name

Communication

established

error

terminated

protocol

error

A protocol error occurs in a message received from a service node. A
connection attempt fails, or an existing session terminates.

Correction Attempt to reconnect to the service. This condition indicates
a possible problem with the LAT software on the service node. Report the

problem to the system manager of the service node.
Local

-226-

Cornnection

Invalid
Local

-26B6-

name

messade

Connection

name

not

slot

established

received

terminated
s

Invalid

Problem

message

aor

slot

received

The service node is receiving DECserver 100 messages that violate the

LAT protocol.

Correction Try the CONNECT command again. If the connection to the
service fails, initialize the server again to down-line load the server soft-

ware. If the error messages appear again for CONNECT, there may be a

hardware problem affecting the random access memory (RAM). Refer to

Section 4.6 for information about Digital services to assist you further.

4-24

DECserver 100 Terminal Server Operations Guide

4.4.3 Group Codes Mismatch
The following messages at a terminal may indicate a group codes mismatch.
Local

-711-

Service

Local

-716-

Access

Problem

name

not

service

Known

name

denied

Semice node group codes do not match the group codes for the terminal.

pomy

Correction Confirm the mismatch by entering the SHOW SERVICE
S

service-name command at the terminal. If the service node does not ap-

—

pear in the display, the group codes do not match.

Determine the group codes that are in effect for the service node. Then
adjust the group codes for the terminal as described in Section 2.5.1.

DECserver 100 Troubleshooting

4-25

4.4.4 Service Node Software Not Running
One of the following error messages may appear:
Local

-711-

Service

name

not

Known

Local

-715-

Service

name

not

currently

available
R—

Problem

The LAT service node software is not running on any service node offering

the service.

Correction Ask the system manager of a node that offers the service to

restart the service node software. The DECserver 100 Terminal Server

Software Installation Guide and the LAT Network Manager’s Guide contain details about the procedure.

4-26

DECserver 100 Terminal Server Operations Guide

4.4.5 Service Node Not Available
The following message may appear when a terminal user tries to connect to a service:
Local

-715-

Problem

Service

name not

currently

available

A service node has shut down either normally or due to a system crash.
Enter the SHOW NODES ALL command to determine if the service node
has ‘“‘unreachable” status.
Correction Attempt to connect again to the service. If other service nodes

offer the service, the DECserver 100 establishes a session. If no session is
established, contact the system manager of the nonoperational service
node.

DECserver 100 Troubleshooting

4-27

4.5 Problems Involving the Ethernet
Section 3.2.1 contains guidelines for monitoring the Ethernet using the SHOW
COUNTERS display. The SHOW COUNTERS data is your primary tool for detect-

ing Ethernet problems. However, down-line load or up-line dump failures also indicate possible Ethernet problems.

Problem

The counters listed on the right hand column of the SHOW COUNTERS
display exceed guidelines.
G

Message 915 (console terminal only) indicates that a transmission failed
after several attempts during a down-line load or up-line dump.

Down-line loads or up-line dumps fail intermittently.

Correction Use the privileged LOOP command to test the circuits between the DECserver 100 and any node on the Ethernet. The command
syntax is discussed in detail in Chapter 5. The server software displays
either message 512 or 513 on your terminal to indicate whether this loop-

back test succeeds or fails. If the test fails, coordinate with your network
manager to resolve the Ethernet problem.

Ask the system manager of the load host to check the load host’s Ethernet
counters. If the counters indicate a possible Ethernet problem, the system
manager can use the NCP LOOP CIRCUIT command to test the Ether-

net between the load host and the DECserver 100. If the test is unsuccessful, contact the network manager.

4-28

DECserver 100 Terminal Server Operations Guide

ORI,

4.6 Digital Service

The hardware and software service options available from Digital are described in the
DECserver 100 Terminal Server Site Preparation/Hardware Installation Guide. One
hardware option and one software option are in effect for your DECserver 100 system.
Contact your Digital sales representative for more information.

4.6.1 Before You Contact Digital
To help insure a prompt solution to your problem, do the following before you contact
Digital:

e Perform any troubleshooting procedures described in this chapter. If possible be
sure to use a console terminal while performing troubleshooting procedures. A console terminal provides much more information about the trouble than would otherwise be the case.

e Write down your server’s serial number, its software version number, and the information on the ECO Status label.

e If possible make a note of what activity was taking place when the server failed.
Also, be prepared to describe the troubleshooting steps you took and any results
these steps produced.

4.6.2 Repackaging the Server for Shipment
If you return the DECserver 100 to Digital for repair or replacement, repack the unit
properly. If possible you should use the original shipping carton and packaging material.

4.6.3 Forwarding Up-line Dump Data

If a fatal bugcheck (message 913) caused an up-line dump of the server memory image
(see Section 4.2.5), send the dump file to Digital. Copy the file to 1600 bpi magtape, a
TU58 cartridge, or an RX01 or RX02 diskette. Indicate the format of the copy
(BACKUP,FLX,etc.) on the media. Forward the data to the address available from
your Digital representative.

DECserver 100 Troubleshooting

4-29

R—

Jr—

sy,

—

S—

S
DECserver 100 Command Descriptions

This chapter is an alphabetical reference of all DECserver 100 commands. Chapters 2

and 3 provide guidelines for using some of the commands and for setting various
characteristics.

In the syntax for DECserver 100 commands, a keyword is a word that appears in
uppercase letters. A parameter is an optional part of the syntax. A value is a number
or word that you specify. The preface discusses the conventions used in the commands’ syntax.

You can enter DECserver 100 commands in either uppercase or lowercase characters
(or a combination of both), and command lines can be up to 132 characters in length.
or any
You can type a command line on two terminal display lines. Do not press
other character at the end of the first terminal line. Separate the words in a command
line by one or more spaces.

If you enter a command incorrectly, one of the following error messages appears:
Command

svntax

error

Local

-701~

Local
Local

-703- Yalue invalid or out of ranges
-704- Privileded command or opPtion

Local

-702-

Kevword

"word"

not

Known

ambiduous

"nnnnnn"

Refer to Appendix A for an explanation of these error messages. Check the command
syntax and reenter the command. Each of the following command descriptions has
the syntax for the command it describes. It also indicates whether the entire command requires privileged status or whether individual parameters require privileged
status.

The examples show the command with keywords abbreviated to three letters. If you
wish, you can abbreviate keywords to fewer than three characters if the word remains
unique.

5-1

“Normal Response’” shows an example of the message you normally receive from the
server when you enter the command. If there is no command response, the Local>
prompt indicates successful execution of the command.

“Error Response” lists examples of the possible messages you can receive if the command does not execute successfully.

Ao,

5-2

DECserver 100 Terminal Server Operations Guide

BACKWARDS

Use this command to resume the previous session.

The previous session is the session that appears at the bottom of the SHOW SESSIONS display.

If you have only one active session, that session resumes, and message 102 appears. If

you have two active sessions, your noncurrent session resumes.
Syntax:

BACKWARDS
Example:
Local» BACK

Normal Response:
Local
Local

-012-102-

METDATA session 3 resumed
No other session(s) active

Error Response:
Local
Local

-712- No connection established
-2nn- Connection to METDATA terminated
termination reason text

DECserver 100 Command Descriptions

5-3

BROADCAST

Use this command to send a message to other DECserver 100 terminal users.
You can specify that a particular terminal receive the message, or you can transmit to
all terminals. The message appears on a destination terminal even if the terminal has
a currently active service session. The message does not appear if the destination
terminal is logged out, or if BROADCAST is disabled for the terminal.

Syntax:
BROADCAST ) TERMINAL number |

message-text

ALL
where

TERMINAL

specifies the terminal that receives your message. The terminal num-

number

ber can be in the range 1 to 8. The message appears only at a terminal
if that terminal has BROADCAST ENABLED as a terminal characteristic.
|

ALL

specifies that the message is to be sent to all terminals on the server.
This is privileged.

message-text

is the text of the message. If you enclose the text in quotation marks,
it is broadcast exactly as entered. If you omit the quotation marks,
the message is broadcast entirely in uppercase characters. The length
of the text is limited to 125 characters.

Example:
Local>

BRO

TER

"Now

logded

in"

This command sends the string in quotes to terminal 7.
Normal Response (at terminal 7):
Local -501~ From
Now logdged 1in

terminal

John

Jones

Error Response:
Local

-611-

Broadcast

disabled

termival

7
s,

5-4

DECserver 100 Terminal Server Operations Guide

- CONNECT

Use this command to establish a session with a service.

Once the connection is established, you remain in service mode until you enter the

local switch character, until the service terminates the connection, or until you log out
from the service. If a service terminates a session, the server notifies you and returns
your terminal to local mode. If the service you request is not available, you receive a
message informing you of this, and the terminal remains in local mode.

If you enter only the keyword CONNECT, the DECserver 100 connects you to a

preferred service, if one is specified.

If terminal n is a nonkeyboard device (for example, a printer), you can type CONNECT TERMINAL n to connect it. The device must have the terminal characteristic
TYPE OTHER.

Syntax:

CONNECT [TERMINAL number] [SERVICE] [service-name]
where

TERMINAL
number

specifies the number of a nonkeyboard terminal that has 1ts terminal
characteristic, TYPE, defined as OTHER. Thisis privileged. In most
cases the terminal numberis omitted, and the terminal from which

you issue the command is connected.

service-name

specifies the name of a service. Service names are 1 to 16 characters in
length. If you do not enter a service name, the server completes a
connection to the preferred service.

Examples:
Local>

CON

SALES

Localx

CON

SER

METDATA

Local>

CON

TER

Local>

CON

PRINT_SERVICE

The first and second commands connect the current terminal to the services SALES

and METDATA respectively. The third command connects terminal 2 to the service
PRINT__SERVICE. The fourth command connects to the service specified by the
PREFERRED SERVICE parameter of the DEFINE or SET TERMINAL command.
If no preferred service is in effect, this command generates an error.
Normal Response:
Local

Local

-101-

other

session(s)

-010- Connection

active

to METDATA established

DECserver 100 Command Descriptions

session 2

5-5

Error Response:
Local

-013-

Continuing

lLocal

~-711~

Service

Local

-714-

Preferred

Local

~715-~

Service

lLocal

-716-

Access

Local

-718-

Session

Local

-719-

attempts

METDATA

not

service

METDATA
to

memory

Local

-721-

Terminal

Local

-2nn-

Connection

must
to

has

not

service

limit

connect

METDATA

Known
not

been

currently

METDATA

defived

availahble

denied

reached
complete

tvepe

SALES

oPeration

‘QOTHER’

not

established

rejection reason text
s

pr
e

DECserver 100 Terminal Server Operations Guide

' DEFINE

SET

Use this command to change the login password. This is a privileged command.
The login password restricts access to all server functions. The DEFINE command
alters the server’s permanent database, and the change does not take effect until the
next initialization procedure. The SET command alters the server’s operational database. The change takes effect immediately but does not stay in effect after an initiali|
zation.

The login password is a string of 1 to 6 keyboard characters. When you type the
command, a password and a verification prompt appear. Enter the same string in
response to both prompts.
Syntax:

DEFINE | LOGIN PASSWORD
|

SET

Password> password
Verification> password
where

indicates that the password you specify is the password required to log in

the terminals that have the LOGIN characteristic enabled.

password

is the LOGIN password: a string of one to six keyboard characters.

Example:
Local» DEF

LOG

PAS

Password> DAESFE (not echoed)
Yerification> DAESFG (not echoed)

This command defines D4E5F6 as the terminal login password. The password becomes effective after the next server initialization.
Error Response:
Local
Local

-741-742-

Invalid password
Password wverification

DECserver 100 Command Descriptions

error

5-7

JDEFINE | PRIVILEGED PASSWORD

SET

Use this command to change the privileged password. This is a privileged command.
The privileged password restricts access to DECserver 100 privileged commands. The

DEFINE command alters the server’s permanent database, and the change does not
take effect until the next initialization procedure. The SET command alters the
server’s operational database. The change takes effect immediately but does not stay

in effect after an initialization.

The privileged password is a string of 1 to 6 keyboard characters. When you type the

command, a password and a verification prompt appear. Enter the same string in

response to both prompts.

Syntax:

{DEFINE

PRIVILEGED PASSWORD

Password> password
Verification> password
where

PRIVILEGED

indicates that the password you specify is the password required to
gain access to privileged commands.

password

is the PRIVILEGED password: a string of one to six keyboard characters.

Example:
Locallx

DEF

Password:

PRI

PAS

AIBZC3

Verification®

(not

AIBZC3

echoed)
(not

echoed)

This command defines A1B2C3 as the privileged password. The password becomes
effective after the next server initialization.

Error Response:
Local

-741-

Invalid

Local

-742-

Password

password

verification

error
A

5-8

DECserver 100 Terminal Server Operations Guide

DEFINE | SERVER

SET

Use these commands to specify DECserver 100 characteristics. These are privileged
commands.

The DEFINE command alters the server’s permanent database and the changes do
not take effect until the next initialization procedure. The SET command alters the
server’'s operational database. These changes take effect immediately but do not
remain in effect after an initialization.
Syntax:

DEFINE |
SET

SERVER

CIRCUIT [TIMER] milliseconds
fnumber
CONSOLE
NONE

DUMP

JENABLED
DISABLED

HEARTBEAT

JENABLED |
DISABLED

KEEPALIVE [TIMER] secs
LOCATION “location”
LOGIN ) LIMIT number
NOLIMIT
NAME “server-name’
NUMBER number

SOFTWARE “filename”
where

CIRCUIT TIMER

specifies the interval between messages sent from the DECserver 100 to service nodes. The value can range from 30 to
200 milliseconds. A short circuit timer value minimizes user
response time, but maximizes service node loading. The de-

fault is 80, and this is recommended. Do not SET this parameter while any sessions are active.

CONSOLE

designates one DECserver 100 terminal as the console terminal. The console is used for status displays and for troubleshooting functions. The default is terminal number 1.

DUMP

Specifies whether up-line dumping of server memory is performed when a fatal bugcheck occurs. The default 1s ENABLED.

DECserver 100 Command Descriptions

5-9

HEARTBEAT

specifies whether the server checks collision detection circui-

try. You should enable HEARTBEAT for error free opera-

NSO,

tion with all Digital transceivers. However, certain other
transceivers do not support collision detection. For these

transceivers, specify DISABLED to ignore heartbeat errors

on all message transmissions. The default is ENABLED.

KEEPALIVE TIMER

specifies the interval between messages for circuits on which
no data is being transmitted. The value can range from 10 to

180 seconds. The default is 20 and this is recommended. Do
not SET this parameter while any sessions are active.

LOCATION

specifies the location of the server. The location is transmitted by the server to service nodes in LAT messages. Enter a
string of 1 to 16 keyboard characters enclosed in quotation
marks (*). The default is spaces. Do not SET this parameter
while any sessions are active. (Note that the keyword LOCATION can be abbreviated to no fewer than 5 characters.

See the example below.)
LOGIN LIMIT

specifies the permitted frequency of login attempts at any
terminal attached to the DECserver 100. The frequency is
expressed in attempts per minute. The range is 0 to 250 and

the default is 3.
NAME

specifies a name for the server. This name is useful for identifying the server and is transmitted by the server to service
nodes in LAT messages. Enter a string of 1 to 16 keyboard

characters enclosed in quotation marks (‘). The default is
“DECserver 100”. Do not SET this parameter while any
sessions are active.

NUMBER

specifies a number for the server. This number is useful for

identifying the server, and is transmitted by the server to
service nodes in LAT messages. Use a value in the range 0 to

ARSI

32767. The default is 0. Do not SET this parameter while
any sessions are active.

SOFTWARE

specifies the file name of the server software load image.
During initialization the image is down-line loaded from a

load host to the server. The file name is 0 to 9 characters

enclosed

in
quotation
marks
().
The
default
is
PSO0801ENG. Refer to the DECserver 100 Terminal Server
Software Installation Guide for more details.

5-10

DECserver 100 Terminal Server Operations Guide

BN,

Examples:
Local> DEF
Local> SET

SER
SER

NAME "SALES-4"
CIR GO KEE 30

LOCAT

"TECH

SALES®

The first example defines a permanent name and location for the server. The second
command reassigns values for its circuit timer and keepalive timer; values that remain in effect only until the server is next initialized.
Error Response:

Local
Local

-728-730-

Parameter
Parameter

cannot
cannot

be
be

DECserver 100 Command Descriptions

modified
modified

with connection
- try adain

establish

5-11

DEFINE \ TERMINAL

SET

Use these commands to specify terminal characteristics.
The DEFINE command alters a terminal’s characteristics in the server’s permanent
database. These changes do not take effect until the next login for the terminal. The

SET command alters the terminal’s characteristics in the server’s operational database. These changes take effect immediately, but revert to the permanent characteristics at the next login.
With privileged status you can change the characteristics of any terminal or all the

terminals. With nonprivileged status you can only change the characteristics of the
terminal you are using.

Syntax:
DEFINE

SET

AR,

TERMINAL

|number|

AUTOBAUD ) ENABLED

ALL

DISABLED

AUTOCONNECT {ENABLED}
DISABLED

BACKWARD [SWITCH] J character
NONE
BROADCAST ) ENABLED

DISABLED

CHARACTER [SIZE]{ }
DEDICATED [SERVICE] | service-name
NONE

INPUT

FLOW [CONTROL]

OUTPUT

) ENABLED
DISABLED

FORWARD [SWITCH] | character
NONE

GROUP [CODES] J code-list
|
ALL

ENABLED
DISABLED

LOCAL [SWITCH] ) character
NONE

LOSS INOTIFICATION]

) ENABLED
DISABLED

5-12

DECserver 100 Terminal Server Operations Guide

MESSAGE [CODES]

|ENABLED

DISABLED
NAME “terminal-name”

PARITY

(ODD
EVEN

‘

pa—

PREFERRED [SERVICE] ) service-name
|

NONE

SESSION ) LIMIT number
LNOLIMIT
INPUT

SPEED speed

OUTPUT
TYPE | ANSI
-

OTHER

SOFTCOPY

USERNAME “username”
o=

VERIFICATION

| ENABLED

DISABLED
where

TERMINAL | number|
ALL

specifies which terminal(s) the command affects. This is a privileged
parameter. You can enter a particular terminal number, or you can

specify all the terminals by typing ALL. A nonprivileged user enters

the command without this parameter and the command affects only

the terminal he or she is using.

AUTOBAUD

enables the server to automatically detect the following terminal char-

acteristics: speed, parity, and character size. The server sets its termi-

nal port characteristics to those values it detects. The default is EN-

ABLED. This parameter is privileged.
:

AUTOCONNECT
-

allows the server to automatically connect the terminal to a service. In
the absence of a dedicated or preferred service, AUTOCONNECT
operates only upon abnormal termination of a connection, or upon

failure to establish a requested connection. With a dedicated service

or preferred service and AUTOCONNECT ENABLED, a connection
—

is automatically made to the service when the terminal user logs in.

po—

The default for AUTOCONNECT is DISABLED.

BACKWARD SWITCH

specifies a switch character that allows you to directly resume your

previous session. BACKWARD SWITCH performs the same function

as the BACKWARDS command without the requirement to reenter

local mode. The default is NONE.

DECserver 100 Command Descriptions

5-13

BROADCAST

specifies whether the terminal receives messages sent from other terminals. ENABLED permits reception. The default is ENABLED.

CHARACTER SIZE

specifies the number of bits in data characters exchanged between the

terminal and the server. Permissible values are 7 and 8. The default is
8.

DEDICATED

enables the terminal, when logged in, to be connected permanently to
a single service. This configuration simulates a direct, local interface

SERVICE

between the terminal and a service node. Local mode is inoperable
when a DEDICATED SERVICE is specified, and AUTOCONNECT
is automatically ENABLED. The default is NONE. This is privi-

leged.

INPUT

| FLOW

OUTPUT | CONTROL

specifies whether the terminal recognizes special characters that tem-

porarily inhibit the transfer of data between terminal and server.
FLOW CONTROL affects flow control in both directions. Enter IN-

PUT or OUTPUT if you want flow control in one direction and not the

other. INPUT specifies whether the terminal recognizes flow control

characters sent from the server. OUTPUT specifies whether the terminal transmits flow control characters to the server. The default for
all options is ENABLED.

FORWARD SWITCH

specifies a switch character that allows you to directly resume your

next session. FORWARD SWITCH performs the same function as the
FORWARDS command without the requirement to reenter local
mode. The default is NONE.

GROUP CODES

specifies groups consisting of service nodes and terminals. The termi-

nal must be in the same group as a service node to have access to the
node. You can specify group codes in the range 0 to 127. To modify the
code list, enter group numbers separating each by a comma (,); a

hyphen (-) between two numbers denotes a range of groups (see the

example below). Enter ENABLED to provide access to the nodes in
the code list. Enter DISABLED to inhibit access to those nodes.The
default is group code 0 ENABLED. This is privileged.
LOCAL SWITCH

specifies a switch character that you can use to reenter local mode
from service mode. Choose any terminal keyboard character. The de-

fault is NONE. You can always use the
LOGIN

key to enter local mode.

specifies whether users must enter a password to gain access to their
terminals and to server functions. If LOGIN is disabled, access is not

restricted. If LOGIN is enabled, a password is required. The default is

DISABLED. This parameter is privileged.

5-14

DECserver 100 Terminal Server Operations Guide

LOSS NOTIFICATION

specifies whether you are alerted that a typed character is lost due to
data error or overrun. If enabled, the server transmits a BEL character (an audible beeping sound) for each character that you must
reenter. The default is ENABLED.

MESSAGE CODES

specifies whether message codes appear with status and error messages. Message codes are 3-digit numbers used to categorize messages.
The default is ENABLED, which permits the codes to appear.

NAME

defines a terminal name of 0 to 12 keyboard characters. Enclose the
name in quotation marks (“). Use the name, for example, to identify
the normal terminal user or the terminal’s location. The default is no
name. This is privileged.

PARITY

specifies the terminal parity. The legal parity types are ODD, EVEN,
or NONE. The default is NONE.

PREFERRED SERVICE

specifies a preferred network service. When you log in or enter CONNECT without specifying a service name, the server attempts a connection to the preferred service. With a preferred service, you can
enter local mode at any time. The default is NONE. (See AUTOCONNECT.)

SESSION LIMIT

limits the number of permitted service sessions. You can specify a
value from 0 to 4. NOLIMIT permits four sessions and the default is 4.
This is privileged.

INPUT
|
ouTPUT

TYPE

SPEED

specifies the terminal speed in bits per second. Permissible values are
75, 110, 134, 150, 300, 600, 1200, 1800, 2000, 2400, 4800, 9600, and
19200. Specify INPUT or OUTPUT if you want the input and output
speeds to be different. The input speed is the speed from the terminal
to the server. The output speed is the speed from the server to the
terminal. The default for all options is 9600 bps.

specifies the terminal type. Specify one of four types, as follows:
e ANSI - for use with video terminals that support ANSI escape
sequences. The delete key erases deleted characters from the screen,
and moves the cursor one character to the left. The screen clears
before all terminal displays, and the displays build downward lineby-line from the top of the screen. Terminals in the Digital VT100
and VT200 series can be set up as type ANSI.
e HARDCOPY - for use with paper-output terminals. The delete key
echoes deleted characters between backslashes (\). The Digital
LA120 is an example of a hardcopy terminal.

DECserver 100 Command Descriptions

5-15

* OTHER - for use with noninteractive terminals (for example, out-

put-only printers). DECserver 100 commands cannot be entered at

TYPE OTHER terminals, and DECserver 100 messages are not
displayed. The Digital LA50 is an example of a type OTHER termi-

nal. OTHER is a privileged value for TYPE.

* SOFTCOPY - for use with video terminals. The delete key functions as in ANSI terminals. All server displays build upward line-

by-line from the bottom of the screen. The Digital VT52, for example, is a softcopy terminal.

The default type is HARDCOPY.
USERNAME

specifies a user name of 1 to 12 keyboard characters. Normally, you
type a user name when you log into the terminal. However, you can

specify it with this parameter. The user name characteristic is entered

only in the server’s operational database, and you can specify it only
with the SET TERMINAL command. The default is the value for the

terminal’s NAME characteristic.

VERIFICATION

specifies whether the server sends informational messages when you

connect,

disconnect,

switch

sessions.

DIS-

ABLED inhibits informational messages, ENABLED permits display

of the messages. This command does not affect error and warning
messages. The default is ENABLED.

Examples:

Local>

DEF

TER

FOR

Local>

SET

TER

GRO

COD

Local>

1,2,6-19:25

DEF

AUTOC

ENA

PRE

DEVELOP

LOC

BACK

SPE
ENA

4800
SES

LIM

The first example defines the permanent switch characters and the speed for terminal

2. The options in the second example affect how terminal 8 can be used in service
mode, and are in effect only until the terminal is logged out. In the third example, a

preferred service is permanently assigned to the terminal.

5-16

DECserver 100 Terminal Server Operations Guide

DISCONNECT

Use this command to terminate sessions.

If you enter only the keyword DISCONNECT, the server disconnects your current
session (the session at the top of the SHOW SESSIONS list).

Specify a terminal number in the privileged DISCONNECT command when you wish
to disconnect a nonkeyboard device. The device must have the terminal characteristic
TYPE OTHER.

Syntax:
DISCONNECT [TERMINAL number]

|SESSION number
ALL

where

TERMINAL
number

specifies the number of a nonkeyboard device that must have the
terminal characteristic TYPE OTHER. You cannot enter the number

of a “‘regular” interactive terminal. This is privileged.
SESSION

spemfies the session to be disconnected. If you do not spemfy a ses-

number

sion, the server terminates the current session.

ALL

specifies that all sessions associated with the terminal are to be
disconnected.

Examples:
Local>

DIS

Local>

DIS

TER

Local>

DIS

ALL

SES

The first command disconnects the current session for the terminal being used. The

second command disconnects session 1 for noninteractive terminal 4. The third command disconnects all sessions for the terminal being used.
Normal Response:
lLocal

-011-

Session

Local

-014-

A1l

disconnected

from

sessions

disconnected

connection

established

METDATA

Error Response:
Local

-712-

Local

-717-

Session

Local

-721~-

Terminal

not
must

established
be

tvyrpe

DECserver 100 Command Descriptions

OTHER

5-17

FORWARDS

Use this command to resume the next session.
The next session is the second session in the SHOW SESSIONS display list.

If you have only one active session, that session resumes, and message 102 appears If
you have two active sessions, your noncurrent session resumes.

Syntax:
FORWARDS
Example:
lLocal>

FOR

Normal Response:
Local
Local

-012-102-

METDATA session 1 resumed
No other session(s) active

Error Response:
Local

-712-

Local .~-2nn-

connection

established

Connection to METDATA
termination reason text

terminated

5-18

DECserver 100 Terminal Server Operations Guide

HELP

Use this command to display on-line help.

HELP displays are different for privileged and nonprivileged users. If you are using a
nonprivileged terminal, only nonprivileged commands and characteristics appear.

If you enter only the keyword HELP, the server generates a display of the most
frequently used commands (nonprivileged status) or the entire DECserver 100 command set (privileged status).
Syntax:

HELP [MORE

]

TERMINA L
SERVER

where

displays additional commands (nonprivileged status only).

TERMINAL

displays the syntax for entering terminal characteristics in the SET
TERMINAL and DEFINE TERMINAL commands.

SERVER

displays the syntax for entering server characteristics in the SET
SERVER and DEFINE SERVER commands. This is privileged.

Examples:
Local»
Local»
Local>

HEL
HEL
HEL

TER
SER

DECserver 100 Command Descriptions

5-19

INITIALIZE

Use this command to reinitialize the server, perform an orderly shutdown of normal
operations, and execute one of several types of diagnostic self-test. This is a privileged
command.

The green light (LED) on the DECserver 100 indicates the results of the self-test.
When the self-test starts, the light is turned off. When the test is completed, the light

assumes one of the following states:

® On continuously; the server passed the self-test.
e Blinking; the self-test detected a nonfatal hardware error.

e Off; the self-test failed. A fatal hardware error was detected.
If the value for COUNT is greater than 1, several repetitions of the self-test occur. The
light reflects the most serious error condition detected in any of the test events.

Syntax:

INITIALIZE [DELAY mins] [DISABLE] | DIAGNOSE

|BRIEF

COUNT number

FULL

{LOOP

NORMAL

and

INITIALIZE ABORT

where

DELAY mins

delays the beginning of initialization for the specified number
of minutes. The DECserver 100 prints warning messages at
regular intervals to alert terminal users. The value can range
from 0 to 65535. The default is 1 minute.

DISABLE

inhibits the CONNECT command and the AUTOCONNECT
function following initialization. Enter INITIALIZE again
without the DISABLE parameter to enable CONNECT and

AUTOCONNECT.
DIAGNOSE

BRIEF

executes the part of the standard self-test that is internal to the
DECserver 100 unit. This parameter does not test the server’s
connection to the Ethernet.

DIAGNOSE FULL

executes an extended version of the self-test that performs an
in-depth memory test. The test takes approximately 90 seconds
to execute.

5-20

DECserver 100 Terminal Server Operations Guide

DIAGNOSE

executes the standard self-test. This is the default parameter.

NORMAL

COUNT number

allows the self-test you choose to repeat n times. The number n
can range from 1 to 32767, and the default is 1.

LOOP

specifies that the self-test is to run indefinitely. You must re-

move the server’s power to stop the test.
INITIALIZE

terminates a previously requested initialization. ABORT takes

ABORT

effect only if the previous initialization has not yet begun (see
DELAY).

Examples:
Local®*

INI

DEL

Local>

INI

ABO

DIA

FULL

The first command delays initialization for two minutes, and generates the nonstan-

dard self-test to carry out an in-depth memory test. The second command aborts an
initialization that has not yet taken effect.

Normal Response (on all terminals):

Local

-G699-

WARNING

Local

area

DECserver 100 Command Descriptions

service

efldimfi

£ minutes

5-21

LOCK

Use this command to disable your terminal and prohibit access by unauthorized
users.

The LOCK command does not disconnect current service sessions. When you issue
the LOCK command, the server prompts you for a password and a verification of the
password. The LOCK password is a string of 1 to 6 keyboard characters.

Upon password verification the server prints a short informational message, and
prompts you to reenter the password to unlock the terminal. The terminal cannot be

used until you enter the correct password. When you type the correct password, the
terminal is unlocked and the Local> prompt returns. If you type an incorrect password, the password prompt is reissued.

Syntax:
LOCK
|
Lock password> password (not echoed)
Verification> password (not echoed)

Unlock password> password (not echoed)
where
password

is the LOCK password you choose. The password is a string of 1 to 6

keyboard characters.
Normal Response:
G,

Local

-019-

Terminal

locKed

Error Response:
Local

-741-

Invalid

Local

-742-

Password

rpassword

wverification

error

NOTE

Remember the LOCK password. You can unlock a terminal only with
the password or by logging it out from the privileged terminal.

5-22

DECserver 100 Terminal Server Operations Guide

LOGOUT

- Use this command to log out a terminal.

LOGOUT logs out a terminal from the DECserver 100 and disconnects any sessions
associated with the terminal. When you log in again, the server resets the terminal
characteristics to those defined in its permanent database.

If you enter only the keyword LOGOUT, the command affects only the terminal you
are using.

Syntax:

LOGOUT [TERMINAL number)
where

TERMINAL
number

specifies the terminal to be logged out. The number must be in the
range 1 to 8. This parameter is privileged.

Example:
Local: LOG

TER

The command logs out terminal 1, and disconnects all service sessions for the terminal.
'

Normal Response (on the logged out terminal):
Local

-020-

Logded

out

terminal

DECserver 100 Command Descriptions

5-23

LOOP

Use this command to test the physical connections between the server and another
node on the Ethernet. This is a privileged command. The server transmits a message
indicating whether the test is successful.

The nodes in the loop test need not be service nodes. Also, the command permits you

to enlist the assistance of an intermediary node in testing the circuits.

Syntax:

LOOP address1

|HELP

| TRANSMIT
RECEIVE

FULL

ASSISTANT address2 |
{
|

where

address1

specifies the Ethernet address of the node with which the
server 1s attempting to communicate. The Ethernet address is

a 12-digit hexadecimal number. You type the number in six
groups of two digits each; separating the groups with hyphens

().

HELP TRANSMIT

indicates that the node with address? relays the outgoing
transmission from the server to the node with address].

HELP RECEIVE

HELP FULL

indicates that the node with address2 relays the returning
transmission from the node with address! to the server.

indicates that the node with address2 relays both the outgoing

ity

and returning transmissions between the node with addressl

and the server.

ASSISTANT
address2

TRANSMIT, RECEIVE, or FULL assist.

Examples:

LOO

RO,

Local% LOO 10-1F-23-43-1A-00 HEL TRA ASSIST AA-00-01-43-1A4-00

Local®

specifies the Ethernet address of the node that supports the

10-1F-23-43-1A-00

The first command causes the server to transmit a signal to the node with Ethernet

address 10-1F-23-43-1A-00. The outgoing transmission is relayed by an assistant
node with address AA-00-01-43-1A-00. In the second example, the test transmission

goes directly to node 10-1F-23-43-1A-00 without assistance.

Normal Response:
P

Local

-512-

Loor

test

Local

successful

~-513-

Loop

test

failure

5-24

DECserver 100 Terminal Server Operations Guide

MONITOR COUNTERS

Use this command to provide a continuously updated SHOW COUNTERS display.
s

This is a privileged command. You can use it to monitor traffic through the terminal

server. Stop the display by typing any character. The local prompt then appears.

Syntax:
e

MONITOR [COUNTERS]

Example:
Local>

MON

NOTE
If your terminal is a video terminal that supports ANSI escape
—

sequences, set the terminal to TYPE ANSI for the optimal display of

the MONITOR command.

DECserver 100 Command Descriptions

5-25

RESUME

Use this command to resume a session from local mode.
If no sessions are in effect, you receive an error message. If you terminate a service

session with DISCONNECT, the RESUME command does not restart the session.

Syntax:

RESUME [SESSION] [number]
where

number

indicates the service session you wish to restart. Obtain session numbers by
entering the SHOW SESSIONS command. By entering RESUME with no
number, the server resumes the top session in the SHOW SESSIONS
display list.

Example:
Local» RES
Local>

RES

SES

The first command restarts the current session established for this terminal. The
second command activates session 3 in the SHOW SESSIONS list.
Normal Response:
AT

Local

-012-

SALES

session
.1

resumed

Error Response:
lLocal

-712-

lLocal

~-717-

Session

connection
3

not

established
established

5-26

DECserver 100 Terminal Server Operations Guide

SET NOPRIVILEGED

Use this command to set your terminal to nonprivileged status when it is in privileged
status.
|
Syntax:

SET NOPRIVILEGED
Example:
Local>

SET

NOP

DECserver 100 Command Descriptions

5-27

SET PRIVILEGED

Use this command to set the terminal you are using for privileged operations. You can
enter this command in nonprivileged status, but you must know the privileged password.

Only one terminal at a time can be privileged. By default, upon login, a terminal is
nonprivileged. When you set a terminal for privileged operations, a prompt appears

for you to enter the privileged password. The password is a string of 1 to 6 keyboard

characters.

Syntax:
SET PRIVILEGED [OVERRIDE]
Password: password
where

OVERRIDE

allows you to transfer the privileged status to your terminal from another terminal.

Example:
Local>

SET

Password>

PRI

OVE

A1B2C3

(not

echoed)
DL

This command overrides the privileged status at another terminal and transfers it to

the terminal you are using.
NOTE
SO

Be sure to reset the terminal to nonprivileged after you perform any

privileged operations. If a terminal is left in privileged status, unauthorized users can change passwords.
e

Error Response:
Local

-741-

Invalid

pPassword

lLocal

-743-

Another

termivnal

already

privileged

5-28

DECserver 100 Terminal Server Operations Guide

SHOW COUNTERS

Use this command to display counter information about messages transmitted and

received by the server.

The counters represent data accumulated since the counters were last set to zero. The

information under ETHERNET COUNTERS applies to low-level data link transmissions between the DECserver 100 and all nodes on the Ethernet. The information
under SERVER COUNTERS applies only to communications between the server and

the other nodes that implement the LAT architecture.

You can interrupt the SHOW COUNTERS display with

. The local prompt

reappears.

Syntax:

SHOW COUNTERS
Example:
LOCAL>

SHO

COU

Normal Response:
*

ETHERNET

Seconds Since Zeroed:
Brvtes Received:
Brtes Sent:
Frames Received:
Frames Sent:
Multicast Bvytes Rcu'd:
Multicast Bvytes Sent:
Multicast Frames Rcuv’d:
Multicast Frames Sent:
Frames Sents Deferred:
Frames Sentsy 1 Collision:
Frames

Sents

Messades
Messades
Messades

DECserver

1223
1728681
789753
12891
11627
1781

196
178
&
12
1

Collisions:
#

Received:
Transmitted:
Re-Transmitted:

COUNTERS

Excessiuvue Collisions:
Carrier Check Failure:
Frame Too Long:
" Heartbeat Absent:
Late Collision:
Data Underrun:
Block Check Error:
Framing Error:

Data Owerrun:
System Buffer Unavailables:
User Buffer Unavailable:

SERVER

COUNTERS

12128
10846
9

100 Command Descriptions

Duplicates Received:
Illedal Messades Rcuw’'d:
Illedal Slots Recu'd
Durlicate

Node

Count

5-29

Here are descriptions of the data fields in the SHOW COUNTERS display.
Seconds Since Zeroed

shows the elapsed time since the counters were last set to
Zero.

Bytes R‘eceived‘

shows the total number of bytes contained in datagrams suc-

Bytes Sent

shows the total number of bytes contained in datagrams suc-

cessfully received by the server.

cessfully transmitted by the server.
Frames Received

shows the total number of datagram frames successfully

received by the server.
P

Frames Sent

shows the total number of datagram frames successfully
transmitted by the server.

Multicast Bytes Rcv’d

shows the number of bytes received by the server that were
transmitted in multicast frames.

Multicast Bytes Sefit

shows the number of bytes transmitted by the server in multicast frames.

Multicast Frames Rcv’d

shows the total number of multicast frames received by the

server.

Multicast Frames Sent

shows the total number of multicast frames sent by the
server.

Frames Sent, Deferred

shows the number of times that frame transmissions by the

server were deferred during the initial transmission attempt.
Frames Sent, 1 collision

shows the number of times that a frame was successfully

transmitted by the server on the second attempt after a collision during the first attempt.

Frames Sent, 2+ collisions

shows the number of times that a frame was successfully sent

by the server after collisions during the first two or more
attempts.

Excessive Collisions

shows the number of times a message transmission was
aborted due to 16 successive collisions.

Carrier Check Failure

shows the number of times the Ethernet carrier signal was
lost during a transmit.

Frame Too Long

AR08

shows the number of times a frame was received with the

byte count greater than 1518 bytes (the maximum allowed by
Ethernet).

Ao,

5-30

DECserver 100 Terminal Server Operations Guide

Heartbeat Absent

shows the number of times that no heartbeat signal was detected when the server characteristic HEARTBEAT was enabled.

Late Collision

shows the number of times a collision occurred after the
Ethernet slot time elapsed.

Data Underrun

shows the number of times the server hardware failed to
transmit because it was unable to keep up with the data rate.

Block Check Error

shows the number of times a received frame failed the CRC
data integrity check.

Framing Error

shows the number of times a frame was received with one or
more incomplete bytes.

Data Overrun

shows the number of times server hardware lost an incoming
frame because it was unable to keep up with the data rate.

System Buffer Un&vailable
User Buffer Unavailable

shows the number of times no system buffer was available in
the server for an incoming frame.

shows the number of times no user buffer was available in
the server for an incoming frame which passed through the
system buffer.

Messages Received

shows the number of LAT messages successfully received by
the server.

Messages Transmitted

shows the number of LAT messages successfully transmitted
by the server.

Messages Re-Transmitted

shows the number of LAT messages that the server retransmitted because they were not acknowledged by the service nodes.

Duplicates Received

shows the number of LAT messages that the server received
more than once.

Illegal Messages Rcv’'d

shows the number of LAT messages with an illegal format
received by the server.

Illegal Slots Rev’d

shows the number of LAT messages with an illegal slot format received by the server.

Duplicate Node Count

shows the number of times a service node became available
with different Ethernet addresses.

DECserver 100 Command Descriptions

5-31

SHOW NODES

Use this command to display information about the service nodes in the server data-

base.

Nodes are authorized or unauthorized depending upon group code access. They are

reachable or unreachable depending upon whether they currently accept connections
from DECserver 100 terminals.

You can interrupt a SHOW NODES display with ‘. The local prompt reappears.
Syntax:

SHOW NODES

|node-name
ALL

where

node-name

specifies the service node for which information is displayed. If you do
not enter a node name, information appears for all authorized service

nodes with REACHABLE or UNKNOWN status. If you enter a node

name, you receive a display with more detailed data about the specified

node. The counters in this display apply to messages exchanged between the DECserver 100 and the specified service node.

ALL

displays information for authorized nodes that are REACHABLE, UNKNOWN, or currently UNREACHABLE. For the privileged SHOW

NODES ALL command, all nodes appear, whatever their status, that
are authorized for at least one of the DECserver 100 terminals.

Examples:
Local*

SHO

NOD

ALL

Locall»

SHO

NOD

SALES

The first command produces information about all service nodes that are REACHABLE, UNREACHABLE, or UNKNOWN. The second command generates detailed

information about the service node SALES.
Normal Response (for the SHOW NODES ALL command):
Node

Name

Status

Hfiachablen

HDWENG

METDAT

Hardware

Unreachable

METDAT

Weather

Connected

SALES

oS,

Announcement

HDIWENG
SALES

UAX

Engdineering
Data

11/780

Svystem
st

5-32

DECserver 100 Terminal Server Operations Guide

Normal Response (for SHOW NODE SALES):
SALES

Connected

SALES

AA-00-01-2C-1E-01

UAXY

Seconds

11/780

Phvsical

Address:

Messades

Received:

178762

Durlicates

Since

Messades

Transmitted:

202827

Illedal

Messades

Re-transmitted:

Illedal

Slots

Duplicate

Svystem

Zeroed:

71288

Received:

Node

Rcu’d:

Count:

The data fields in the SHOW NODES listings contain the following information.
Node Name

lists the name of the service node as defined in the server’s
node database.

Status

shows the current reachability status of the service node:
* Reachable - indicates that no sessions are active, but the

service node is accessible.
e Unreachable - indicates that communication with the
service node has been inactive for more than 30 minutes,
or an active service session has timed out. The node may

also specifically signal that it is unreachable.
e nn Connected - shows that nn sessions with this node are
currently active, and that the node is reachable.
e Unknown - indicates that no sessions are active, and

that the node has not been heard from recently.
Announcement

gives a brief description about the service node as entered

by the system manager.

Physical Address
Messages Received

lists the Ethernet address of the service node.
lists the number of LAT messages successfully received by

the server.
Messages Transmitted

lists the number of LAT messages successfully transmitted

by the server.
Messages Re-transmitted lists the number of LAT messages that the server re-

transmitted because they were not acknowledged by the
service node.

Duplicates Received

shows

the

number

of LAT

messages

that

the

server

received more than once.

DECserver 100 Command Descriptions

5-33

Illegal Messages Rev’d

shows the number of LAT messages with an illegal format
received by the server.

Illegal Slots Rev’d

shows the number of LAT messages with an illegal slot

format received by the server.

Duplicate Node Count

shows the number of times a service node became available

with different Ethernet addresses.

|
o,

ARy,

5-34

DECserver 100 Terminal Server Operations Guide

SHOW SERVER

Use this command to display information about the DECserver 100.
i

The command displays server characteristics that are stored in the server’s perma-

nent and operational databases. The characteristics enclosed in parentheses are those

in the permanent database. These values do not take effect until the next server

initialization.

The keyword SERVER in this command can be abbreviated to no fewer than five

characters (see the example below).

—

You can interrupt aSHOW SERVER display with @rReak). The local prompt reappears.

Syntax:
SHOW SERVER

Example:

Local>

Normal Response (for nonprivileged SHOW SERVER):

—

Address:

AA-00-03-49-F1-00

Urtime:

Name :

MarKeting

(MarKeting

Pod)

Location:

BLDNG

Software:

PS0OBOI1ENG

a—
~

SHO

SERVE

Number:

Circuit

Timer:

Keerpalive

SECT

(BLDNG

SECT

13:14:52

(PSOBOLIENG)

175

(173)

(g0)

(20)

Port:

(1)

Limitz

3
ENA

(3)
(ENA)

ENA

(ENA)

Console

Timer:

Pod

Hearthbeat:

Load Host: AA-00-03-F3-C1-05

METDAT

DECserver 100 Command Descriptions

5-35

TS,

Normal Response (for privileged SHOW SERVER command):
Address:

AA-00-03-49-F1-00

Uptimes:

Name:

MarKeting

(MarkKeting

Location:

BLDNG

Software:

PSOBO1ENG

Number:

SECT

(BLDNG
(

80
20
1

Limit:

(

Heartbeat:

ENA

(ENA)

Dump
Load

OO0

0000

(ENA)

Status:

SECT

e—

( 80)
( 20)
(1)

ENA

Software

17:38:28
Pod)

1795)

Dume:

Server

(PSOBO1ENG)

175

Circuit Timer:
Keerpalive Timer:
Console Port:

Logdin

Pod

Status: PC=00204E5P=01FEDZ2,8R=002500yMEM=000000,CODE=00/

Host:
Host:

AA-00-04-00-CD-10
AA-00-03-F3-C1-03

sy,

METDAT

The fields that can be specified by DEFINE SERVER and SET SERVER are discussed in the command descriptions for those commands. Here is a description of the
other data fields in the SHOW SERVER listing:
Uptime

shows the time since the last server initialization. A 3-digit figure
indicates the number of full days of uptime. Three 2-digit figures
separated by colons (:) indicate part of an additional day in hours,
minutes, and seconds.

Server Status

lists the following codes from left to right across the display:

e A 2-digit hardware status code. The code is nonzero if a fatal hardware error was detected during the self-test at the last initialization.
This code normally does not appear unless the error is intermittent.

e A 4-digit code of ones and zeros that describes a nonfatal hardware
error.

e A series of eight 2-digit codes (one code for each terminal) that
describes nonfatal terminal port errors or checksum errors.

Software

displays the word ‘“Normal”’ or shows server memory data and the up-

Dump Host

shows the Ethernet address of the node that received the last up-line

Status

—

line dump host when a fatal software error has occurred.
dump of server memory.

Load Host

shows the Ethernet address and node name of the node that last
down-line loaded the server.

5-36

DECserver 100 Terminal Server Operations Guide

SHOW SERVICES

Use this command to display information about the services you are authorized to use
while in service mode.

Nodes are authorized or unauthorized depending upon group code access. If at least
one authorized node offers a particular service, then you can use that service.
Entering only the keywords SHOW SERVICES generates a one-line-per-service display. The information includes service name, status, and service announcement. Only
those services with AVAILABLE or UNKNOWN status are included.

You can interrupt a SHOW SERVICES display with

. The local prompt

reappears.

Syntax:

SHOW SERVICES | service-name
- ALL

where

service-name

displays a list of all nodes that supply the specified service. Included

ALL

generates a one-line-per-service display. The information is similar to

in the display are each node’s reachability status, service announcement, and rating for dynamic load balancing.

that with SHOW SERVICES except that services with UNAVAILABLE status are also included. The privileged SHOW SERVICES
ALL command lists all services, whatever their status, that are authorized for at least one of the DECserver 100 terminals.

Examples:
Local>

SHO

lLocal>

SHO

SER
SER

ALL
DEVELOP

The first command lists all services on the Ethernet. The second command produces
information about the service nodes offering the specific service DEVELOP.
Normal Response (for SHOW SERVICES ALL):
Service

DEVELOP
METDATA
SALES
UMSMATL

Name

Status

Announcement

Available
Urnavailable
Afuvailable

Software Development
Weather Information
Monthly Sales Data

Available

DECserver 100 Command Descriptions

Mail

seruver

5-37

Normal Response (for SHOW SERVICES DEVELOP):

Service DEVELOP - Available
Node

Name

Status

HDWENG

UrnKrown

METDAT

Unreachable

SALES

Reachahble

Rating

Announcement

HDWENG

()

METDATA

SALES

Hardware

Weather

Ufi%

Evndineerind

oy,

Prodrams

11/780

Svstem

Here are descriptions of the headings in the SHOW SERVICES displays.
Service Name

shows the title that identifies the network service.

Node Name

shows the name of the service node as defined in the database of each
node that offers the service.

Service Status shows the current reachability status of the service:
e Available - indicates that one or more service nodes which offer the
service has the status REACHABLE.

e Unavailable - indicates that none of the service nodes which offer
the service is REACHABLE or UNKNOWN.

e Unknown - indicates that none of the service nodes which offer the
service is REACHABLE, and one or more is UNKNOWN.

Nod‘e Status

shows the current availability of the service node:

¢ Reachable - indicates that no sessions
are active, but the service

node is accessible.
e Unreachable - indicates that communication with the service node

has been inactive for more than 30 minutes, or an active service

session has timed out. The node may also specifically signal that it
is unreachable.

e nn Connected - shows that nn sessions with this node are currently
active, and that the node is reachable.
e Unknown - indicates that no sessions are active, and that the node

has not been heard from recently.
Rating

shows the relative capability for a service node to process new ses-

sions: the higher the rating number, the greater the capability.
Announcement provides a description of the service.

5-38

DECserver 100 Terminal Server Operations Guide

SHOW SESSIONS

Use this command to display information about your service sessions.

The command lists session number, service name, and service description. SHOW
SESSIONS places the current session at the top of its display list. When you terminate a session, the session below it in SHOW SESSIONS takes its place in the
display.

When you enter only the keywords SHOW SESSIONS, the server generates a list of

the sessions for the terminal you are using.

You can interrupt a SHOW SESSIONS display with

. The local prompt

reappears.

Syntax:

SHOW SESSIONS

|TERMINAL number
ALL

where

TERMINAL

displays a list of sessions for the specified terminal.

number

displays a list of sessions for all terminals attached to the DECserver

ALL

100.

Example:
Local’»

SHO

SES

TER

This command displays the session information for terminal 2.
Normal Response (for SHOW SESSIONS):
Terminal 2
- Session 2=
- Session J:

- Session 4:
-

Session

John Doe
DEVELOP
METDATA

SALES

DEVELOP

Connected
DEVELOP
VAKX 11/780 Svstem
Weather Prodrams

UAX

*#%%

11/780 Svstem

Disconnected

***

Here the service DEVELOP, not the terminal user, ended session 4. The terminal user
can still resume session 4 to determine why the service node stopped the session.

DECserver 100 Command Descriptions

5-39

Normal Response (for SHOW SESSIONS ALL):
Terminal

John

Conmnected

Doe

Hession

Session

METDATA

Weather

Session

SALES

VAX

Terminal

Session

DEVELOP

Richard

Roe

DEVELOP

VAKX

lLocal

DevelopPment

~Jack

Jones

Local

Terminal

John

Smith

Connected

Terminal

METDATA

Mary

Patrick

Mode

Weather
Local

Segssion

HWDENG

Hardware

Session

SALES

VAKX

Session

Pat

O0‘Dea

METDATA

Prodrams

mode

Terminal

Endineering

11/780

Local

Svstem

Mode

Software

Session

Svstem

Prodrams

11/780

Terminal

DEVELOP

11/780

Svstem

mode

Weather

Prodrams

5-40

DECserver 100 Terminal Server Operations Guide

SHOW TERMINAL

Use this command to display information about a terminal.

This information includes the characteristics that you assign with the DEFINE and
SET TERMINAL commands. SHOW TERMINAL displays the characteristics that
reside in both the server’s operational and permanent databases. The characteristics
in parentheses are the permanent characteristics. They take effect each time the
terminal user logs in.

SHOW TERMINAL commands entered at privileged and nonprivileged terminals
differ slightly.

. The local prompt

You can interrupt a SHOW TERMINAL display with
reappears.

Syntax:

SHOW TERMINAL

|number
ALL

where

number

specifies a particular terminal for which information is displayed. The

ALL

states that information for all terminals is to be included in the display.

number must be in the range 1 to 8.

Example:
Local>

SHO

TER

This command prints a display of information about terminal 3.
Normal Response (for nonprivileged SHOW TERMINAL):
Terminal

Pat 0’'Dea

Name :

(ENA) Term Tyrpe: ANSI
ENA
Autobaud:
(ENA) I/P Speed: 9600
ENA
Broadcast:
Back‘'d Switch: NONE (NONE) O/P Sepeed: 9600
8
Char Size:
(%)
TR
Forw’d Switch:
NONE
(%) Paritvy
4
Local Switch:
1
(ENA) Storp Bits:
ENA
Lodin:
(ENA) Verificat n:ENA
ENA
Loss Notif 'n:
Autoconnect:
Session Limit:

ENA
4

(ENA)
(d4)

(Office_42)

Office.dZ

(ANST)
(19Z200)
(18200)
(8)
(NONE)
(1)
(ENA)

Preferred Service:
Current Session

DECserver 100 Command Descriptions

RSCH
2

I/P Flow Ctl: ENA (ENA)
@
S On:
I1/P Off:
O/P Flow Ctl: ENA (ENA)
Q
“S 0On:
o/P Off:
0
Framing Errors:
0
Parity Errors:
0
Overrun Errors:
(RSCH)
Service:

BERGIL

5-41

Normal Response (for privileged SHOW TERMINAL):
Termirnal

John

Doe

Name :

Office_d2

(Office_d2)

Autobauds:

ENA

(ENA)Y

Term

Tvyrpe:

SOFT

(SOFT)H

I/P

Flow

Ctl:

ENA

Broadcast:

ENA

(ENA)

I/P

Speed:

8BGO0

(9600

I/P

Off:

Ony

" Q

Back’d

Switcha:

NONE

(NONE)

O/P

Sreed:

89600

(9600)

O/P

Flow

Ctl:

ENA

(ENA)

Switchs

“ ¥

(“®W)

Char

Size:

Off:

“S

Onc:

“Q

Forw’d
Local

Switchz:

(8)

NONE

(NONE )

(1)

(ENA)

VYerificat 'n:rENA

(ENA)

Duerrun

(ENA)

Preferred

NONE

(NONE
)

('Y

ENA

(ENA)

Stor

Loss

ENA
ENA

(4)

Notif ‘ns

Atoconnect:
Session
Grour

Limits:

Pari1tyv:

Bits:

Current

Service:

Session

Framing

Paritv

Errors:

Errors:
Errors:

Service:

(ENA)

0
0
——

SALES

Codes:

O0-255

(0-2558)

The fields that can be specified by the DEFINE or SET TERMINAL commands are

described in that section. Here is a description of the other data fields in the SHOW"

TERMINAL listing:

I/P Off

shows the control character sent by the server to stop data currently

being sent from your terminal to the server.
I/P On

shows the control character sent by the server to restart the flow of data
from your terminal to the server.

O/P Off

shows the control character you enter to stop the current data output to

your terminal.

O/P On

shows the control character you enter to restart the data output to your
terminal.

Framing Errors

shows the number of bytes received with bad framing at the server’s
terminal port.

Parity Errors

with parity enabled, shows the number of bytes received with parity
errors at the server’s terminal port.

Overrun Errors

shows the number of characters lost because the server’s input buffers
were full.

Current Session

———

shows the service session in effect or the service session interrupted when
the user last entered local mode.

5-42

DECserver 100 Terminal Server Operations Guide

SHOW USERS

Use this command to display information about active server users.

The command generates a one line listing for each user. The terminal number, user
name, status, and service (if connected) appear in the display. The status shows
whether the user’s terminal is currently in local mode, or connected to a service.
You can interrupt the SHOW USERS display by entering
prompt reappears.

. The local mode

Syntax:

SHOW USERS
Example:
Local> SHO

USE

Normal Response:
Terminal

Usermame
1:

John

Doe

Status

Service

Connected
Local Mode

DEVELOP

Terminal
Terminal

Termivnal
Terminal

4d:
5:

Jack
John

Jones
Smith

Local Mode
Connected

Terminal

Mary

Patrick

Local

mode

Terminal

Pat

Local

Mode

Richard

Roe

O0'Dea

DECserver 100 Command Descriptions

METDATA

5-43

STOP TEST TERMINAL
S

Use this command to terminate test activity generated by the TEST TERMINA

command. This is a privileged command.

If the test involved the loopback function, the result of the test appears
on the

privileged terminal.

Syntax:

STOP TEST TERMINAL number
where
s

number

specifies the terminal for which the command terminates testing.

Example:
Local>

5T0

TES

TER

This command stops TEST TERMINAL activity at terminal 3.
Normal Response:
Local

-511-

Test

complete

BOO0O

hvtes

Wwrittens

error(s)

detected

Error Response:
Local

-732-

Terminal

wot

under

test

5-44

DECserver 100 Terminal Server Operations Guide

TEST TERMINAL

Use this command as a tool to test a terminal’s operation.

The command generates a continuous stream of ASCII characters which are transmitted either directly to a specified terminal or to the terminal’s port on the server.
If you enter only the keywords TEST TERMINAL and a terminal number, the server

sends a continuous stream of characters to the terminal screen. This continues until
you press any key (or BREAK)) at that terminal.
You also stop the test when you specify
the terminal in the STOP TEST TERMINAL command.

If you enter the LOOPBACK parameter the characters go only to the terminal port
and return. You must place the terminal port loopback connector in terminal port.
You cannot use the LOOPBACK parameter to test the privileged terminal.
Syntax:

TEST [TERMINAL number] IWIDTH number] [COUNT number] [LOOPBACK]
where

TERMINAL

specifies the terminal where the test output appears. This is privi-

number

leged.

WIDTH number

specifies the screen width of the lines of ASCII output. The width
can vary between 1 and 132 characters, and the default is 72
characters.

COUNT number

specifies how many lines of ASCII characters are output. If you do
not specify a number, lines appear until you stop the output.

LOOPBACK

determines that the test pattern is output to the terminal’s port in
the terminal server and looped back with an external loopback

connector. The looped back data is compared with that transmitted. When the test is complete, a message appears indicating the
number of errors and number of bytes transferred. This is a privileged parameter.
Examples:
Local>

TES

TER

WID

COU

Local> TES

The first command causes terminal 8 to receive a stream of 5 lines of keyboard

characters. Each line is 32 characters wide. The second command generates a continuous test output at the local terminal.

DECserver 100 Command Descriptions

5-45

Normal Response:
0123456789

3<=:7"BABCDEFGHI JKLMNO

123456789
3 =:7"@ABCDEFGHI JKLMNOP

23456788
3= 7CABCDEFGHIJKLMNOPQ
34567893

=>7"CABCDEFGHI JKLMNOPQR

45367893

=:-7"EABCDEFGHI JKLMNOPORS
A

Error Response:
Local

-731-

Terminal

not

Local

-733-

Terminal

configured

already

under

for

loopback

test

test
G,

oD,

5-46

DECserver 100 Terminal Server Operations Guide

ZERO COUNTERS

Use this command to reset the counters for the Ethernet, server, and terminals. This
is a privileged command.

ZERO COUNTERS does not zero the uptime counter in the SHOW SERVER display. This is reset only after an initialization or power-up of the DECserver 100.
-

Syntax:

ZERO [COUNTERS]
Example:
Local>

ZER

DECserver 100 Command Descriptions

5-47

P—

sy,

P—

ey,

ROy

—

Status and Error Messages

This appendix describes all status and error messages issued by the DECserver 100.
All messages describe the status or error in a self-explanatory sentence.

A 3-digit message code appears with each message. The message codes help categorize
the messages. You can disable the codes for any terminal using the SET TERMINAL
or DEFINE TERMINAL command (refer to Chapter 5). The message codes are
enabled by default.

A.1 Classes and Formats of Messages
There are five classes of status and error messages. Each is distinguished by its
message code series as shown in Table A-1.

Table A-1:

Classes of Status and Error Messages

Message

Codes

Types of Messages

000-099

Informational messages — normal responses to user commands.

and
500-599

100-199

Warning messages — warnings about events that may not be expected or valid.

and
600-699

200-299

Connection error messages — reasons for terminating or not establishing service
connections.

700-799

900-999

User error messages — explanations of why user commands may not be honored.

Console messages — status and error messages issued from the DECserver 100
ROM software.

A-1

All DECserver 100 messages appear in one of two formats. If the 3-digit message codes

[—

(represented by nnn) are enabled, they have this format:

Local -nnn- status or error message text
If message codes are disabled, they have the following format:

Local - status or error message text

Message codes always appear for the 900 series of messages.
Messages with codes of 0 to 499 are intended for use with all Digital terminal servers.

Messages with codes of 500 to 999 are specific for the DECserver 100.

A.2 Message Listings and Explanations
This section lists each message in its class and presents explanatory text for each
listing. Italic type marks the parts of messages that vary with network and DECserver

configurations. For example, name stands for the name of a service on a particular

Ethernet.

A.2.1 Informational Messages (message codes 000-099 and 500-599)
Local

-010-

Covnection

name

established

sescion

Issued following a successful connection to a service. The service name and ses-

sion number are displayed. This message only appears if VERIFICATION is

enabled.
Local

-011-

Session

disconnected

from

name
IS,

Issued following a normal termination of a session; for example, one terminated

with the DISCONNECT command. This message only appears if VERIFICA- -

TION is enabled.
t.ocal

-012-

name

session

resumed

Issued following resumption of a session. The service name and session number
are displayed. This message only appears if VERIFICATION is enabled.

A-2

DECserver 100 Terminal Server Operations Guide

Local

-013-

Continuing

attempts

connect

name

Issued when AUTOCONNECT is enabled following an unsuccessful connect re-

quest or abnormal termination. This message follows an error message which
explains the unsuccessful connection or termination. The server reissues this mes-

sage if the reason for the connection failure changes.
Local

-014d-

All

sessions

disconnected

Issued following a DISCONNECT ALL command.
Local

~019-

Terminal

locked

Issued following a successful LOCK command.
Local

-020-

Lodded

out

terminal

Issued after the terminal user enters LOGOUT, or after the terminal is logged out
from the privileged terminal.
Local

-501-

message

text

From

terminal

username

Appears at a terminal when that terminal is sent a broadcast message from

another terminal. The header line includes the terminal number and user name of
the sender.
Local

-511-

Test

complete

bytes

writtens

error{(s)

detected

Issued following a STOP TEST TERMINAL command when a loopback test is

stopped. It displays the number of bytes written/read during the test, and the
number of errors or data discrepancies detected. The number of errors would
normally be zero. Refer to Section 4.3 if the number of errors is nonzero.
Local

-512-

Loorp

test

successful

Appears on the privileged terminal following successful execution of a LOOP

command. This message indicates that the loop attempt is successful with no
data corruption. Refer to Section 4.5.
Local

-513-

Loop

test

failure

Appears on the privileged terminal following an unsuccessful execution of a
LOOP command. This message indicates that either the LOOP response timed

out, or that the data returned in the message is corrupted. Refer to Section 4.5.

Status and Error Messages

A-3

A.2.2 Warning Messages (message codes 100-199 and 600-699)
Local

-101-

other

session(s)

active

Issued following a connect request if the user has at least one other session active.
Local

-102-

other

session(s)

actiuve

Issued following a FORWARDS command, BACKWARDS command, or switch
character when only one session is active. The current session is successfully

resumed.
Local

~GB0O1-

Interval

Svstem

memory

defaults

error

terminal

Parameters

effect

Issued during the terminal logging in sequence. The permanent parameters for
this terminal are corrupted, and the factory-set defaults are in effect. Refer to

Section 4.3.2.

Local

-G0OZ-

Interval

Svstem

memory

defaults

error

Server

parameters

effect

Issued during the terminal logging in sequence. The server’s permanent characteristics are corrupted, and the factory-set defaults are in effect. Refer to Section
4.2.2.
Local

~-GBl11l-

Broadcast

disabled

terminal

Appears following a broadcast command when broadcast is disabled on the specified terminal(s). The specified terminal does not receive the message.
Local

-699-

WARNING

Local

area

service

endindgd

minutes

Issued at regular intervals to all terminals following an INITIALIZE command.

The server will be reinitialized in the number of minutes shown. There is no
additional notice following the 1 minute message.

A-4

- DECserver 100 Terminal Server Operations Guide

A.2.3 Connection Error Messages (message codes 200-299)
Local

-201- Connection to name not
No

response

within

established

timeout

pPeriod

Appears when a connect request (or autoconnect attempt) is unsuccessful. The
service node did not respond within 10 seconds. The probable cause is that the
service node is down. This condition causes the service node status to change to
UNREACHABLE. Refer to Section 4.4.

Local

-202-

Connection

to name not

Communication

protocol

established
error

Appears when a connect request (or autoconnect attempt) is unsuccessful because
of a LAT protocol error in a message sent by a service node. Refer to Section 4.4.
Local

-20B6-

Connection

response

to name terminated
within

timeout

Period

Appears when an existing connection is abnormally terminated because the service node does not respond within 10 seconds. The probable cause is that the
service node is down. This condition causes the service node status to change to
UNREACHABLE. Refer to Section 4.4.

Local

-207-

Connection

to name terminated

Communication

PpProtocol

error

Appears when an existing connection is abnormally terminated because of a LAT
protocol error in a message sent by a service node. Refer to Section 4.4.

Local

-Znn- Connection

to name not

established

rejection reason text

Appears when a connect request (or autoconnect attempt) is unsuccessful because
the service node rejects the connect request. The rejection reason text explains
why the node rejected the request.
Code Rejection Reason

nn = 21 Insufficient node resources
nn = 22 System shutdown in progress
nn = 23 Node user disconnect
nn = 24 Circuit timer out of range
nn = 25 Invalid service class

nn = 26 Invalid message or slot received
nn = 27 Time limit expired
nn = 28 No progress being made

For messages 224 and 226, refer to the troubleshooting procedures in Section 4.4.

Status and Error Messages

A-5

Local

-2nn-

Connection

name

terminated

termination reason text

Appears when an existing connection is abnormally terminated by the service
node. The rejection reason text explains why the node terminated the connection.

Code Termination Reason
nn = 61 Insufficient node resources

nn = 62 System shutdown in progress
nn = 63 Node user disconnect

nn = 64 Circuit timer out of range
nn = 65 Invalid service class
nn = 66 Invalid message or slot received

nn = 67 Time limit expired
nn = 68 No progress being made

For messages 264 and 266, refer to the troubleshooting procedures in Section 4.4.

A.2.4 User Error Messages (message codes 700-799)
Local

-701-

Command

svntax

error

Issued when a command is entered incorrectly. The keyword is recognized, but
the command options do not follow the correct syntax; or no command keyword is

entered.
Local

-702-

Kevword

"word"

not

Krnown

ambiguous

Appears when a command is entered incorrectly. The keyword specified in word is
not recognized by the server software; or not enough characters are entered to

make the keyword unique.
Local

-703-

WVYalue

invalid

out

rande»

“nnnnnn"

Issued when a user-specified value is entered incorrectly. The value entered in
nnnnnn is invalid or out of range.
Local

-704-

Privileded

command

option

Issued when a nonprivileged user enters a privileged command or command option.

A-6

DECserver 100 Terminal Server Operations Guide

Local

-710-

Node

name

not

Known

Appears when the node name specified in the SHOW NODES node-name command is not known to the DECserver 100. Either the node name is invalid, or the
node is not authorized for the user. See Section 4.4.
-

Local

-711-

Service

name

not

Known

Issued when the specified service name in a CONNECT service-name command
(or autoconnect attempt) or a SHOW SERVICES service-name command is not
known to the DECserver 100. Either the service name is invalid, or the service is
not authorized for the user. See Section 4.4.
Local

-712-

cormnection

established

Appears when a DISCONNECT or RESUME command is entered, and no connection is established for the current or specified session.
Local

-713-

Connection

already

established

Issued when a CONNECT TERMINAL n command is entered, and a connection
is already established on terminal n. Terminal n is a nonkeyboard device, and
only one session may be active at nonkeyboard devices.
Local

-714~

Preferred

service

has

not

been

defined

Appears when a CONNECT command is entered without a service name. No
preferred (or dedicated) service has been set up.
Local

-715-

Service

name not

currently

available

Issued when a CONNECT command is entered (or autoconnect attempted) and
no node offering the specified service is currently reachable. See Section 4.4.
Local

-716-

Access

seruvice

name

denied

Issued when a connection to a service is attempted, and the user is not authorized
access to the service. The user’s terminal has no group code in common with any
service node that offers the service. See Section 4.4.
Local

-717-

Session

not

established

Appears when a DISCONNECT SESSION n or RESUME SESSION n is entered, and session n does not exist.

Status and Error Messages

A-7

lLocal

-718-

Session

limit

reached

Issued when a CONNECT command is issued, and the terminal already has the

maximum number of sessions active. An additional session cannot be established.
The session limit is defined in a privileged SET TERMINAL command, and can
range from 0 to 4.
Local

-719-

memory

complete

opPeration

Appears when a command cannot be executed. The memory that the server
reserves for storing information about services and nodes is shared with that used

for additional service sessions. This memory is currently fully utilized. You can
wait and try later. For a more permanent solution, define group codes so that the

total number of nodes available to all terminal users is more reasonable. If 100 or
fewer nodes are known to the server, there should be no resource problems. A user
always has access to at least ONE session. Section 2.5.1 discusses group codes.
Local

-721-

Terminal

must

bhe

tvpe

’DTHEH’

Issued when a privileged CONNECT TERMINAL n or DISCONNECT TERMI-

NAL n command is entered, and terminal n is not TYPE OTHER. It is not
possible to connect or disconnect interactive terminals at the privileged terminal,
only nonkeyboard devices. Refer to Section 3.1.
Local

-722-

Server

disabled

Appears when a CONNECT command is issued, and the server is disabled (following an INITIALIZE DISABLE command). Connect requests are not honored
when the server is disabled. Refer to Section 2.6.
Local

-723-

Fatal

Ethervet

Port

error

Appears when a connect request is issued, and a fatal Ethernet port error is
detected. An INITIALIZE from the privileged terminal (or power-up) is required
to correct this condition. After initialization, refer to Section 4.2.2.
Local

-728-

Parameter

cannot

modified

Issued when characteristics specified in

with

connection

established

a SET SERVER command cannot be

changed while connections exist at any terminal. Wait until the terminal users
end their sessions; or enter the DEFINE SERVER command to change the char-

acteristics, and then the INITIALIZE command to make them operational.

A-8

DECserver 100 Terminal Server Operations Guide

Local

-729-

Parameter

cannot

modified

dyrnamically

Appears if a characteristic specified in a SET TERMINAL command cannot be
modified using SET TERMINAL. Use DEFINE TERMINAL to change the characteristic. The change takes effect when the terminal user next logs in.
Local

-730-

Parameter

cannot

modified

trv

adain

Issued when an internal conflict in resources occurs, and a command cannot be
executed.

These

conflicts

are

of brief duration.

The

command should

reentered.
Local

-731-

Terminal

not

configured

for

loorback

test

Appears when the TEST TERMINAL LOOPBACK command is entev’red without
a terminal number. You cannot loopback to your own terminal.

Local

-732-

Terminal

not

under

test

Issued when a STOP TEST TERMINAL n command is entered for a terminal n
that does not have a test running.
Local

-733-

Terminal

already

under

test

Issued when you enter the privileged command TEST TERMINAL n for a terminal n that is already undergoing a test. You can stop the first test by typing STOP
TEST TERMINAL n.
Local

-741-

Ivivalid

rpassword

Issued when one of the following happens:

e You type an invalid password in response to the SET PRIVILEGED command.
e You type a password of more than six characters when you enter these commands:

- DEFINE PRIVILEGED PASSWORD

- SET PRIVILEGED PASSWORD
- DEFINE LOGIN PASSWORD
- SET LOGIN PASSWORD
- LOCK
Reenter the command with the correct password or password syntax.

Status and Error Messages

A-9

lLocal

-742-

Password

Appears for

verification

error

a LOCK, SET PASSWORD, or DEFINE PASSWORD command.

The verification password does not match the original password. Reenter the
entire command again.
Local

-743~

Another

terminal

already

privileded

Issued for a SET PRIVILEGED command when another terminal is already
privileged. Only one terminal can be privileged at a time. In the case of a malfunctioning terminal, the privilege can be transferred using the SET PRIVI-

LEGED OVERRIDE command.

A.2.5 Console Messages (message codes 900-999)
These messages appear: (1) when you enter the INITIALIZE command, (2) when you
power-up the DECserver, (3) when a fatal error occurs. They appear only on the
console terminal, and message codes are always enabled for these messages.
s

Local

-901-

Initializing

DECserver

address- ROM

BL7s

H/W

Rev

A.A

Appears at the start of DECserver 100 initialization approximately 20 seconds
after power-up or the INITIALIZE command. The message displays the following
information:

e The Ethernet address, address, of the server
¢ The version number of the internal ROM software

e The current hardware revision level.
lLocal

-802-

Waiting

for

imagde

load

Issued after the server sends a request-for-load to load hosts. One display of this
message 1s normal for each initialization. However, if the load fails, or no load

——

host volunteers, this message repeats every 30 seconds. Refer to Section 4.2.4.
Local

-903-

Loadindg

from

host

address
OGS

Issued when a load host with the Ethernet address, address, volunteers to down-

line load the server. One such message is normal for each initialization.

lLocal

-904~

Imade

load

comeplete

Appears when a down-line load has successfully completed. Following this mes-

sage, the LAT server software takes control of the DECserver.

A-10

DECserver 100 Terminal Server Operations Guide

Local

-905-

Waiting

for

imade

dump

Issued following a crash of the DECserver 100. The DUMP characteristic is enabled for the server, and the server has requested a volunteer host to perform an
up-line dump. This message appears once for each up-line dump.
Local

-9068-

Dumeping

host address

Issued after the DECserver receives a dump volunteer and an up-line dump has
started. This message appears once for each up-line dump.

Local

-907-

Imagde

dump

complete

Issued when the DECserver 100 has successfully completed an up-line dump. The
self-test code takes control of the server.

Local

-908-

Resettindg

console

terminal

Appears following a fatal bugcheck (message 913). After the fatal error, internal
ROM software uses the current console terminal characteristics for status mes-

sages. Following up-line dump, the console terminal characteristics are reset to
those stored in the permanent database. This message indicates when the reset
occurs.

Local

-910-

Imade

load

not

attempteds

networkK

communication

error

Issued following the self-test if an Ethernet loopback test fails during the self-test.
A down-line load cannot possibly be successful, and could cause network problems. A power-up or initialization (€TRLP) ) is required to clear this condition. Refer
to Section 4.2.2.

Local

Server

-911-

code

WARNING

nnnn:s

Non-fatal

terminal

codes

hardware

error

detected

nn nn nn nn nn nn nn nn

Appears if the self-test detects nonfatal hardware errors during its execution.
Each code digit can be a 0 or 1; a 1 means that an error has been detected for the
appropriate condition.

The number 1 at the various positions in the server code indicates the following
errors:

e 1nnn - Ethernet heartbeat error

e nlnn - Ethernet loopback error

e nnln - Hardware revision level checksum error
e nnnl — Server parameters checksum error

Status and Error Messages

A-11

The number 1 at either of the two positions in the terminal codes indicates the
following:
® 1n - Terminal port error

e nl - Terminal parameters checksum error

Refer to the troubleshooting procedures in Section 4.2.2.

Local

-8912Z-

Load

failure:

timeout

Appears if a down-line load sequence is interrupted, and a load message is not
received for 30 seconds. The load sequence is restarted. Refer to Section 4.2.4.
Local -913- Fatal Budcheck PC=nnnnnns+ SP=nnnnnn , SR=nnnn MEM=nnnnnn

CODE =nnn

Issued when a DECserver 100 crash occurs and is recorded in an orderly fashion.
The message displays the PC, SP, and SR at the time of crash. If an address error
occurs, the illegal address is displayed in MEM. The CODE gives the reason for

the crash. Refer to Section 4.2.5.
Local

~-914-

Timeouts

dumep

aborted

Appears when a timeout condition occurs during an up-line dump, and the dump

is aborted. Following this message, the diagnostic self-test executes. Refer to

Section 4.2.5.
Local

-915-

Tramsmission

failure

after

ten

attemepts

Issued when the load or dump protocol has to retry a single message 10 times.

Refer to Section 4.5.

Local

-916-

Illedal

load

imade:

load

aborted

Appears if the server software being down-line loaded specifies illegal sections of
DECserver 100 memory. Ask the system manager of the load host to reinstall the
server software and then try again to initialize the server.

———
e

A-12

DECserver 100 Terminal Server Operations Guide

Glossary

bugcheck

A process by which the DECserver 100 detects fatal errors and reinitializes.
cluster

A group of VAX computer systems operating logically as a single service node.
collision

A condition that occurs when two nodes on the Ethernet transmit at the same
time.

console terminal

A DECserver 100 terminal on which the 900 series of DECserver 100 messages

appears. By default, the console terminal is the terminal connected to terminal
port 1 on the server.

database

An area of DECserver 100 memory that holds the terminal and server characteristics. There are two databases of this kind; the permanent database and the
operational database.

failover

A feature by which the server automatically attempts a connection to another
service node when a connection terminates abnormally. The server tries to connect to a service node offering the same service. AUTOCONNECT must be enabled for failover.

initialize

To start a procedure that: (1) disconnects all DECserver 100 service sessions, (2)
runs the diagnostic self-test, (3) down-line loads the server software from a load
host, (4) transfers control to the server software. You can initialize the server with
the INITIALIZE command or by power-up.

Glossary-1

local mode

A terminal user’s environment when he or she interacts with the server using
DECserver 100 commands.
nonprivileged status

An operating modein which a terminal user has access only to the nonprwfleged
DECserver 100 commands.
port

The hardware on the DECserver 100 that transmits and receives data to and from
a DECserver 100 terminal or the Ethernet transceiver. Server and terminal characteristics are effective at the terminal ports and at the Ethernet port.
A

privileged status

An operating mode in which a terminal user has access to the privileged terminal
and to the privileged DECserver 100 commands. The server manager is normally
the only user with privileged status.

ROM

An acronym for Read Only Memory; the part of the DECserver 100 memory where
microcode instructions are stored to implement the self-test, down-line loading,
up-line dumping, and maintenance messages. Unlike the server (LAT) software,

instructions stored in ROM are not down-line loaded.

self-test

A diagnostic test that verifies DECserver 100 hardware components. You can
specify various types of self-tests with the INITIALIZE DIAGNOSE command.

server software

The software that implements the LAT protocols on the DECserver 100.
service

A resource provided by network computer systems that is available to DECserver
100 terminal users. A service can be offered by one or more systems.

service mode

A terminal user’s environment when his or her terminal is connected to a service.
service node

A computer system that provides services to a DECserver 100 terminal user.
service node software

The software that implements the LAT protocols on a service node.

session
A connection or interaction between a terminal user and a service.

Glossary-2

Index

Architecture

CHARACTER SIZE terminal

Local Area Transport (LAT), 1-1
AUTOBAUD terminal characteristic,

Characteristics, server

2-11

AUTOCONNECT terminal characteristic,
2-9

characteristic, 2-11

see Server characteristics

Characteristics, terminal
see Terminal characteristics
CIRCUIT TIMER server characteristic,
2-4

Command descriptions, 5-1

examples in, 5-1

BACKWARD SWITCH terminal
characteristic, 2-13

BACKWARDS command, 5-3
BROADCAST command, 3-3, 5-4
BROADCAST terminal characteristic,
2-14

Commands