1. Getting started

This chapter describes this document, includes summaries of changes from previous releases and precautionary messages, and lists command conventions.

1.1. About this document

This document provides a basic overview of the Nokia Service Router Linux (SR Linux). This document is intended for marketing personnel, network technicians, administrators, operators, service providers, and others who need a basic understanding of the SR Linux.

Note:

This manual covers the current release and may also contain some content that will be released in later maintenance loads. Refer to the SR Linux Release Notes for information on features supported in each load.

1.2. What’s new

Table 1 lists the changes that were made in this release.

Table 1: Change summary

Topic	Location
Updated list of customer documents	SR Linux documentation
Description of new 7220 IXR-H2 and 7220 IXR-H3 platforms	Hardware overview
Description of system filter ACLs	Access Control Lists
EVPN-VXLAN support	SR Linux services
BFD support for additional adjacency types	BFD support
OSPF v2 and v3 support	OSPF feature support

1.3. Precautionary messages

Observe all dangers, warnings, and cautions in this document to avoid injury or equipment damage during installation and maintenance. Follow the safety procedures and guidelines when working with and near electrical equipment.

Table 2 describes information symbols contained in this document.

Table 2: Information symbols

Symbol	Meaning	Description
	Danger	Warns that incorrect handling and installation could result in bodily injury. An electric shock hazard could exist. Before you begin work on this equipment, be aware of hazards involving electrical circuitry, be familiar with networking environments, and implement accident prevention procedures.
	Warning	Warns that incorrect handling and installation could result in equipment damage or loss of data.
	Caution	Warns that incorrect handling may reduce your component or system performance.
	Note	Notes contain suggestions or additional operational information.

1.4. Conventions

SR Linux documentation uses the following command conventions.

Bold type indicates a command that the user must enter.
Input and output examples are displayed in Courier text.
An open right angle bracket indicates a progression of menu choices or simple command sequence (often selected from a user interface). Example: start > connect to.
Angle brackets (< >) indicate an item that is not used verbatim. For example, for the command show ethernet <name>, name should be replaced with the name of the interface.
A vertical bar (|) indicates a mutually exclusive argument.
Square brackets ([ ]) indicate optional elements.
Braces ({ }) indicate a required choice. When braces are contained within square brackets, they indicate a required choice within an optional element.
Italic type indicates a variable.

Generic IP addresses are used in examples. Replace these with the appropriate IP addresses used in the system.