ULTRIX Guide to Ethernet Communications Servers

This document, titled "ULTRIX Guide to Ethernet Communications Servers" (Order Number: AA-ME98B-TE, June 1990, for ULTRIX Version 4.0 or higher), is an administrative guide for setting up and maintaining the interfaces between the ULTRIX operating system and communications servers within an Ethernet Local Area Network (LAN).

Primarily focused on terminal servers, the guide is intended for network administrators responsible for ULTRIX networks. It covers essential administrative tasks and procedures, including:

• Tailoring ULTRIX Systems: Configuring ULTRIX systems to act as "load hosts" for downline-loading terminal server software and "service nodes" for user access.
• Printer Setup: Instructions for connecting and configuring printers via a terminal server.
• Host-Initiated Connections: Procedures for setting up connections where the host system initiates the communication.
• LAT/Telnet Gateway: How to set up and use the gateway service, allowing LAT terminal users to connect to remote hosts via Telnet without a local login.
• Custom Services: Guidance on programming and setting up user-defined services.
• Remote Node Maintenance: Detailed information on controlling ULTRIX host nodes for functions like obtaining hardware Ethernet addresses, downline loading, upline dumping of memory, and enabling remote console capabilities for unattended nodes.

The manual also includes sample C-language programs for host-initiated connections and replacing getty for special services, offering practical examples for advanced configurations.