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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 7 provides commands for checking for path protection.

Table 7: 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-namestandby
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.
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