1. Getting Started

1.1. About This Guide

This guide describes Layer 2 service and EVPN functionality provided by the SR-series routers and presents examples to configure and implement various protocols and services.

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.

The topics and commands described in this document apply to the:

  1. 7450 ESS
  2. 7750 SR
  3. 7950 XRS
  4. VSR

Table 1 lists the available chassis types for each SR OS router.

Table 1:   Supported SR OS Router Chassis Types 

7450 ESS

7750 SR

7950 XRS

  1. 7450 ESS-7/12
  1. 7750 SR-a4/a8
  2. 7750 SR-1e/2e/3e
  3. 7750 SR-12e
  4. 7750 SR-1
  5. 7750 SR-7/12
  6. 7750 SR-1s/2s
  7. 7750 SR-7s/14s
  1. 7950 XRS-16c
  2. 7950 XRS-20/40
  3. 7950 XRS-20e

For a list of unsupported features by platform and chassis, refer to the SR OS 21.x.Rx Software Release Notes, part number 3HE 17177 000x TQZZA.

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

Note:

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

  1. 7450 ESS, 7750 SR, 7950 XRS, and VSR Classic CLI Command Reference Guide
  2. 7450 ESS, 7750 SR, 7950 XRS, and VSR Clear, Show, and Tools Command Reference Guide (for both MD-CLI and Classic CLI)
  3. 7450 ESS, 7750 SR, 7950 XRS, and VSR MD-CLI Command Reference Guide
Note:

This guide generically covers Release 21.x.Rx content and may contain some content that will be released in later maintenance loads. Refer to SR OS 21.x.Rx Software Release Notes, part number 3HE 17177 000x TQZZA, for information about features supported in each load of the Release 21.x.Rx software.

1.2. Layer 2 Services and EVPN Configuration Process

Table 2 lists the tasks related to configuring and implementing Layer 2 Services and EVPN functionality.

This guide is presented in an overall logical configuration flow. Each section describes a software area and provides CLI syntax and command usage to configure parameters for a functional area.

Table 2:  Configuration Process  

Area

Task

Section

VLL Services

Configure services for MPLS-TP

Services Configuration for MPLS-TP

Configure VCCV BFD

VCCV BFD support for VLL, Spoke-SDP Termination on IES and VPRN, and VPLS Services

Configure pseudowire switching

Pseudowire Switching

Configure a VLL service

Configuring a VLL Service with CLI

Virtual Private LAN Service (VPLS)

Configure a VPLS service

Configuring a VPLS Service with CLI

VPLS service management

Service Management Tasks

Ethernet Virtual Private Networks (EVPNs)

Configure EVPN-VXLAN and EVPN-MPLS in the same VPLS service

Configuring EVPN-VXLAN and EVPN-MPLS in the Same VPLS/R-VPLS Service

Configure an EVPN service

Configuring an EVPN Service with CLI