Getting started

About this guide

This guide describes the Nokia SR OS segment routing and PCE functionality.

This guide is organized into functional chapters and provides concepts and descriptions of the implementation flow, as well as Command Line Interface (CLI) syntax and command usage.

Note:

Unless otherwise indicated, this guide uses Classic CLI command syntax and configuration examples.

The topics and commands described in this document apply to the following SR OS products:

7750 SR
7950 XRS

See the SR OS R24.x.Rx Software Release Notes, part number 3HE 20152 000x TQZZA, for a list of unsupported features by platform and chassis.

Command outputs shown in this guide are examples only; actual displays may differ depending on supported functionality and user configuration.

Note: The Segment Routing and PCE supports configuration using classic CLI and MD-CLI. This guide provides configuration examples based on classic CLI syntax only.

The SR OS CLI trees and command descriptions can be found in the following guides:

7450 ESS, 7750 SR, 7950 XRS, and VSR Classic CLI Command Reference Guide
7450 ESS, 7750 SR, 7950 XRS, and VSR MD-CLI Command Reference Guide
7450 ESS, 7750 SR, 7950 XRS, and VSR Clear, Monitor, Show, and Tools CLI Command Reference Guide (for both MD-CLI and Classic CLI)

Note:

This guide generically covers Release 24.x.Rx content and may contain some content that will be released in later maintenance loads. See the SR OS R24.x.Rx Software Release Notes, part number 3HE 20152 000x TQZZA, for information about features supported in each load of the Release 24.x.Rx software.

Segment routing configuration process

The following table lists the tasks necessary to configure segment routing functions. Each chapter in this book is presented in an overall logical configuration flow. Each section describes a software area and how to configure that functional area. After the hardware installation has been properly completed, proceed with the router configuration tasks in the following order:

Conventions

This section describes the general conventions used in this guide.

Precautionary and information messages

The following information symbols are used in the documentation.

DANGER: Danger warns that the described activity or situation may result in serious personal injury or death. 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: Warning indicates that the described activity or situation may, or will, cause equipment damage, serious performance problems, or loss of data.

Caution: Caution indicates that the described activity or situation may reduce your component or system performance.

Note: Note provides additional operational information.

Tip: Tip provides suggestions for use or best practices.

Options or substeps in procedures and sequential workflows

Options in a procedure or a sequential workflow are indicated by a bulleted list. In the following example, at step 1, the user must perform the described action. At step 2, the user must perform one of the listed options to complete the step.

Options in a procedure

User must perform this step.
This step offers three options. User must perform one option to complete this step.
- This is one option.
- This is another option.
- This is yet another option.

Substeps in a procedure or a sequential workflow are indicated by letters. In the following example, at step 1, the user must perform the described action. At step 2, the user must perform two substeps (a. and b.) to complete the step.

Substeps in a procedure

User must perform this step.
User must perform all substeps to complete this action.
1. This is one substep.
2. This is another substep.

Area	Task	Section
Segment routing with MPLS data plane	Segment routing in shortest path forwarding	Segment routing in shortest path forwarding
	Establishing segment routing TE LSPs	Establishing segment routing TE LSPs
	Segment routing policies	Segment routing policies
Segment routing with IPv6 data plane	Configuring the locator and SIDs	Configuring the locator and SIDs
	IS-IS control plane extensions	IS-IS control plane extensions
	Configuring IS-IS Flex-Algorithm for SRv6	Configuring IS-IS Flex-Algorithm for SRv6
	BGP service control plane extensions	BGP service control plane extensions
	Route table, FIB table, and tunnel table support	Route table, FIB table, and tunnel table support
	Datapath support	Datapath support
	LFA support	LFA support
	SRv6 tunnel metric and MTU settings	SRv6 tunnel metric and MTU settings
	Service extensions	Service extensions
	Segment routing policies with an IPv6 data plane	Segment routing policies with an IPv6 data plane
	Assignment of loopback interface addresses from an SRv6 locator subnet	Assignment of loopback interface addresses from an SRv6 locator subnet
MPLS forwarding policy	Datapath support	Datapath support
MPLS forwarding policy	Configuring static labeled routes using MPLS forwarding policy	Configuring static labeled routes using MPLS forwarding policy
gRPC-based RIB API	RIB/FIB API configuration overview	RIB/FIB API configuration overview
	RIB/FIB API - IPv4 route table programming	RIB/FIB API - IPv4 route table programming
	RIB/FIB API - IPv6 route table programming	RIB/FIB API - IPv6 route table programming
	RIB/FIB API - IPv4 tunnel table programming	RIB/FIB API - IPv4 tunnel table programming
	RIB/FIB API - IPv6 tunnel table programming	RIB/FIB API - IPv6 tunnel table programming
	RIB/FIB API - MPLS LFIB programming	RIB/FIB API - MPLS LFIB programming
Path Computation Element Protocol	PCEP establishment and maintenance of SR-TE LSP and RSVP-TE LSP	PCEP establishment and maintenance of SR-TE LSP and RSVP-TE LSP
	NSP and VSR-NRC PCE redundancy	NSP and VSR-NRC PCE redundancy
	Configuring and operating RSVP-TE LSP with PCEP	Configuring and operating RSVP-TE LSP with PCEP
ANYsec	Configuring ANYsec connectivity association and PSK	Configuring ANYsec connectivity association and PSK