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Document:	Workstations and MicroVAX 2000 Network Guide
Order Number:	EK-NETAC-UG
Revision:	003
Pages:	80
Original Filename:

OCR Text

Workstations and MicroVAX 2000
Network Guide
Order Number EK-NETAC-UG-003

September 1988

digital equipment corporation

maynard, massachusetts

December 1986
October 1987
June 1988
September 1988

The information in this 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, if any, described in this document is furnished under a license and may be used or copied only

in accordance with the terms of such license. No responsibility is assumed for the use or reliability of software
or equipment that is not supplied by Digital Equipment Corporation or its affiliated companies.
© Digital Equipment Corporation. 1986, 1987, 1988. All rights reserved.

The READER'S COMMENTS form on the last page of this document requests the user’s critical evaluation to
assist in preparing future documentation.
The following are trademarks of Digital Equipment Corporation:

DEBET

DEUNA

DEC

DIBOL

ThinWire

DECconnect

MASSBUS

ULTRIX-32

DECmate

MicroVAX

ULTRIX-32m

DECnet

MicroVMS

UNIBUS

DECUS

PDP

VAX

DECwriter

P/OS

VAXcluster

DELNI

Professional

VAXstation

DELQA

Q-bus

VMS

DEMPR

Rainbow

DEQNA

RSTS

Work Processor

050020
ML-51011

FCC NOTICE: The equipment described in this manual generates, uses, and may emit radio frequency
energy. The equipment has been type tested and found to comply with the limits for a Class A computing
device pursuant to Subpart ] of Part 15 of FCC Rules, which are designed to provide reasonable protection
against such radio frequency interference when operated in a commercial environment. Operation of this
equipment in a residential area may cause interference, in which case the user at his own expense may be
required to take measures to correct the interference.

Contents
Preface

Chapter 1

vii

Overview

Why Networks?

. ...

... ..

1-1

Ethernet Is the DIGITAL Local Area Network .. ..............

1-1

What Makes a Network? . . ... ...

. .

Standard Ethernet . . . . ... ... . ... ...

1-2

ThinWire Ethernet.

. ... ........... e e

1-2

Unshielded Twisted-Pair Ethemet ................ e

1-2

DECnet ...................................... e

1-3

Networking Capabilities of ULTRIX.

1-3

... i

1-4

Local Area VAXclusters (LAVC) .. ...

Chapter 2

.. ................ Ce

Setting Up the Network

Basic ThinWire Components .............
... .. ... ... .. .....
ThinWire Ethernet Cable. . . .. ........

... ...

2-1

.... cee.

Connectors and Terminators ... ..................... Cee

2-4

Additional Equipment . . ....... ..

o o

2-5

DIGITAL ThinWire Ethernet Multiport Repeater (DEMPR).....

2-5

DIGITAL ThinWire Ethernet Single Port Repeater (DESPR) ....

2-6

DIGITAL ThinWire Ethernet Station Adapter (DESTA).. . .. ce.

2-7

The Ethernet Bridge—LAN Bridge 100 (DEBET-AA) ... ... ...

2-7

...

Unshielded Twisted-Pair Ethernet Adapters . . .. ............

2-9

ThinWire Configurations . . .. ..................... e

2-10

DECconnect Approach

........... e Cee e Ce e

Daisy-chain Approach . .. .. e

e e e

2-11

e e oo

2-12

Combined Daisy-chain and DECconnect Approach .......... co.

2-12

Single Segment Configuration . .. .......................

2-13

Multisegment ThinWire Configuration . ... .. .. ........... .
ThinWire Ethernet Rules . . . .. ...

Configurations Symbols.

... ........
... e

. .. ..... ...

... ...

2-16

Single Segment ThinWire Ethernet ... ..... ... .. ... ... ... ..

2-17

Stand-alone DEMPR ... ...

... ...

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

... .

2-15
2-16

2-19

........ e

2-20

Stand-alone Cascading DEMPRs .. ........................

2-22

Stand-alone DELNI with DEMPRs

2-23

Combined Standard/ThinWire Ethernet LAN

Local Bridge . . ... e

. ................ Cee e .
Ce e

2-24

Disconnecting Stations from ThinWire Ethernet . . ... ............

2-25

Local Area VAXcluster Configuration . . . ................. ceee.

2-26

Chapter 3

Installing ThinWire Hardware

Before You Start . ....... e

3-1

Determining Your Needs . . . .. ... ............. e Ce

3-1

.. ... e e

3-1

ThinWire Ethernet Cable.

Connectors . .. ...

3-1

Barrel Connectors and T-Connectors .. .....................

3-2

DESTA and Transceiver Cable.

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

3-2

Terminators.

. . .. .. ... e

3-2

DEMPR.............
.. .. .... e
e
e

3-2

Estimating Your Needs . .. .. e e

3-2

Planning the ThinWire Segment .. .........
... ... ... ... .. ...,

3-3

Setting the Switch for ThinWire Ethernet

... .. e

3-3

Connecting to a ThinWire Ethernet Segment . .. .. ..............

3-4

Connecting a VAXstation 2000 or MicroVAX 2000 . . ... e

3-4

Connecting a Station with a Transceiver Cable ... ..., Ce e ..

Connecting to an Existing ThinWire Network . ............. ..

3-10

How to Install

a DEMPR on ThinWire Ethernet

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

Stand-alone DEMPR .. ...................... e

3-10

3-11

Connecting the DEMPR to Standard Ethernet . ... ............

3-14

Connecting a DESPR to ThinWire Ethernet . . .. ................

3-14

How to Lengthen a ThinWire Segment . .. ............... Cee e

3-14

How to Verify ThinWire Ethernet Network Installatlcm ............

3-15

Troubleshooting the ThinWire Segment . .. ....................

3-16

Troubleshooting the DEMPR . . .................... .

e V4

Troubleshooting the DESTA .. ...........
... .. ... ..., Ce e

3-17

Troubleshooting Unshielded Twisted-Pair Adapters ... ......... ..

317

Troubleshooting Network Software . . . .. e

3-17

Chapter 4

Connecting to Standard Ethernet

Setting the Switch for Standard Ethernet . . .. e

e e

4-1

Using the Loopback Connector .. ...........................

How to Verify Standard Ethernet Network Installation .. ...

4-3

Troubleshooting Standard Ethernet ... ...... P

4-4

Appendix

Associated Documents

Glossary

Index

Figures |
2-1

ThinWire Ethernet Cable . . .. .................... e,

2-3

2-2

COonnectOrsS
. . ... i ittt
e

2-4

2-3

DIGITAL ThinWire Ethernet Multiport Repeater (DEMPR). ...

2-6

2-4

DIGITAL ThinWire Ethernet Station Adapter (DESTA). ... ...

2-7

2-5

Local Bridge . ......... .. .. .. .. .

2-6

Unshielded Twisted-Pair Adapters.

2-8

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

2-9

2-7

Symbols for Cables . ... .................. e

2-10

2-8

DECconnect Method of Wiring . ............. e

2-11

2-9

Single Segment Configuration . ................ e ..

2-13

2-10

Connecting ThinWire Ethernet to Standard Ethemet .........

2-14

2-11

Multisegment ThinWire Configuration . . .................

2-15

2-12

Symbols for Configurations . . ... .......... Cee e Cee e

2-16

2-13

Single Segment ThinWire Configuration

............. ...,

2-18

2-14

Stand-alone DEMPR with ThinWire Cables . . ... ... ... - ...

2-19

2-15

DEMPR on Standard Ethernet ... ... ...... e .o

2-21

2-16

Stand-alone Cascading DEMPRs .. .....................

2-22

2-17

Stand-alone DELNI with DEMPRs

2-23

2-18

Local Bridge ............... e e
e

......
.. e

2-24

2-19

Disconnecting a Station from ThinWire Ethemet .............

2-25

2-20

Local Area VAXcluster.

2-27

... .. ...

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

3-1

Setting the Switch for ThinWire Ethernet

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

3-3

3-2

Connecting a Terminator to the T-connector ..............

3-4

3-3

Adding a Segment to the T-connector .. .................

3-5

3-4

Connecting the T-connector to VAXstation 2000 ...........

3-6

3-5

Connecting a ThinWire Segment and Terminator to the
T-connector. .. ...

. ..

3-7

3-6

Adding a Segment to the T-connector . .. ................

... .

3-8

3-7

Attaching the T-connector to the DESTA ... .......... Ce

3-8

Attaching the Transceiver Cable to the DESTA ......... ...

3-9

ThinWire Cables Connected to the DEMPR............. ..

3-11

3-10

Attaching a Terminator to a ThinWire Segment . . . .. e

3-12

3-11

Terminator Connected to the DEMPR ...................

3-13

3-12

Connecting Two ThinWire Sections . . ......... e

3-14

4-1

Setting the Switch for Standard Ethernet.................

4-1

4-2

Connecting the Intermediary Cable with Loopback Connector .

4-2

Tables
2-1

Ordering Information for ThinWire

Ethernet Cables.

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

.. . .

2-3

3-1

Form to Order Tthmre Equipment ...........
... .. ...,

3-2

A-1

Documentation ..................
... ...... cee

A-

Preface
This manual describes how to configure and install some simple ThinWire
Ethernet networks for the VAXstation 2000 and MicroVAX 2000 systems. It

does not describe all possible configurations, but outlines the rules to follow
when configuring your network with ThinWire Ethernet.