Getting started

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.

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:

  • 7450 ESS
  • 7750 SR
  • 7950 XRS
  • Virtualized Service Router

For a list of unsupported features by platform and chassis, see the SR OS R23.x.Rx Software Release Notes, part number 3HE 19269 000 x 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:
  • 7450 ESS, 7750 SR, 7950 XRS, and VSR Classic CLI Command Reference Guide
  • 7450 ESS, 7750 SR, 7950 XRS, and VSR Clear, Monitor, Show, and Tools Command Reference Guide (for both MD-CLI and Classic CLI)
  • 7450 ESS, 7750 SR, 7950 XRS, and VSR MD-CLI Command Reference Guide
Note: This guide generically covers 23.x.Rx content and may contain some content that will be released in later maintenance loads. See the SR OS R23.x.Rx Software Release Notes, part number 3HE 19269 000 x TQZZA, for information about features supported in each load of the Release 23.x.Rx software.

Layer 2 services and EVPN configuration process

Configuration process 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 1. 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

Multi-instance EVPN: Two instances of different encapsulation in the same VPLS/R-VPLS/Epipe service

Configure an EVPN service

Configuring an EVPN service with CLI

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

  1. User must perform this step.
  2. 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

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