Technical Documentation

Checklist for Path Protection

This checklist provides the steps and commands for configuring and verifying path protection supported by the JUNOS software. The checklist provides links to an overview of path protection and more detailed information about the commands used to configure and verify path protection in different scenarios.

Table 1 provides commands for checking for path protection.

Table 1: Checklist for Path Protection

Tasks

Command or Action

Path Protection Overview 
Configuring and Verifying a Primary Path 
  1. Configure a Primary Path

[edit]
edit protocols mpls

[edit protocols mpls]
set path path-name address <
strict | loose >
set label-switched-path lsp-path-name
to destination

[edit protocols mpls label-switched-path lsp-path-name]
set primary primary-name
set primary primary-name bandwidth bandwidth
set primary primary-name
priority reservation-priority
     setup-priority
show
commit

  1. Verify That the Primary Path Is Operational

show mpls lsp extensive ingress
show rsvp interface

Configuring and Verifying a Secondary Path  
  1. Configure a Standby Secondary Path

[edit]
edit protocols mpls

[edit protocols mpls]
set path path-name destination
loose
set label-switched-path lsp-path-name
secondary
     secondary-name
standby
show
commit

  1. Verify That the Secondary Path Is Established

Deactivate a link or node critical to the primary path.

show mpls lsp extensive

Ensuring That Secondary Paths Establish When Resources Are Diminished

Configure different bandwidth values for the primary and secondary paths. For example:

[edit protocols mpls]
edit label-switched-path lsp-path-name
set primary primary-name bandwidth bandwidth
show
commit

In this example, no bandwidth is configured for the secondary path.

Preventing Use of a Path That Previously Failed

Configure only multiple secondary paths.


Published: 2010-01-30