Introduction
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## Introduction

4DLT™ is a Silicon Graphics implementation of the Local Area Transport (LAT™) protocol, a network protocol originally developed by Digital Equipment Corporation (DEC™) to optimize communications between terminal users and network hosts. 4DLT enables Silicon Graphics computers to participate in a LAT network.

4DLT software performs LAT terminal server functions in a Silicon Graphics computer, allowing a user to connect to the LAT network from his or her workstation. 4DLT software also enables a Silicon Graphics system to supply its resources to other LAT network users.

## Purpose of This Guide

The 4DLT Administrator's Guide explains how to configure and maintain 4DLT software on a Silicon Graphics workstation. The audience for the 4DLT Administrator's Guide is system and network administrators who are responsible for implementing and maintaining LAT services on a Silicon Graphics node. The procedures in this guide require the following proficiencies:

- Familiarity with LAT network features and user functions

- Experience in managing LAN resources

- Familiarity with the IRIX™ operating system

- Facility with a UNIX editor

- Knowledge of network protocols (for STREAMS configuration only)

## Organization of This Guide

The 4DLT Administrator's Guide is organized into these chapters:

Chapter 1, “Notes to New 4DLT Administrators” |  | Introduces concepts and terms that apply to LAT networks. Read this chapter for an overview of LAT network theory and how it applies to the 4DLT application.
Chapter 2, “4DLT Software Fundamentals” |  | Explains the components of 4DLT that are of primary interest to the administrator. Read this chapter to learn about 4DLT processes, files, utilities, and the organization and function of the LAT database. This chapter also explains how 4DLT implements LAT services.
Chapter 3, “4DLT Setup Procedures” |  | Describes the as-shipped 4DLT configuration and the parameters you might need to change before starting the 4DLT application. The chapter also contains procedures for starting and stopping 4DLT.
Chapter 4, “Performing Routine LAT Maintenance” |  | Describes the commands available to monitor and modify 4DLT and provides procedures and examples for using 4DLT commands and utilities. It describes the organization of the LAT services file and explains how to maintain it.
Chapter 5, “Reconfiguring LAT Operating Parameters” |  | Explains 4DLT internal parameters and how to adjust them to suit the needs of a particular LAT network or individual 4DLT node.

Glossary

Index

## Typographical Conventions

This document uses the standard UNIX® convention when referring to entries in IRIX manual pages. The entry name is followed by a section number in parentheses. For example, cc(1) refers to the cc manual entry in Section 1 of the IRIX manual pages

In text descriptions, file and directory names, as well as commands, are shown in italics. Command syntax descriptions follow these conventions:

`typewriter font` |  | Indicates portions of the command that are required in a entry.
italic font |  | Indicates a variable argument. Substitute a valid string or value for these variables.
[brackets] |  | Indicates that the argument shown in brackets is optional. You can omit these arguments in a command entry.
`typewriter bold` |  | Indicates a user entry. Type these entries, or portions of entries, exactly as shown.
<Enter> |  | Indicates a key legend on the workstation keyboard.

## Related Documentation

In addition to the Administrator's Guide, 4DLT documentation consists of the 4DLT Release Notes, which contain technical notes and installation instructions for 4DLT, and the 4DLT User's Guide, which contains instructions for accessing LAT resources from a Silicon Graphics workstation.

For additional introductory information on LAT, see LAT Network Concepts, published by Digital Equipment Corporation.

## Product Support

Silicon Graphics provides a comprehensive product support and maintenance program for its products. For further information, contact your Silicon Graphics service provider.

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4DLT Administrator's Guide |  | Chapter 1. Notes to New 4DLT Administrators