Description

This article provides a step-by-step guide for configuring primary and secondary Label-Switched Paths (LSPs) on SRX Series devices to ensure MPLS redundancy. By setting up a primary LSP and a backup LSP, traffic can automatically reroute in case of a primary path failure, ensuring uninterrupted service and switching back to the primary path when it is reachable again.

Solution

Follow the below configuration to configure the primary and secondary LSP path:

 

 

PE1

 

set protocols mpls label-switched-path pe1-pe2 to x.x.x.x

set protocols mpls label-switched-path pe1-pe2 primary primary-next-hop

set protocols mpls label-switched-path pe1-pe2 revert-timer 5

set protocols mpls label-switched-path pe1-pe2 secondary secondary-next-hop standby

set protocols mpls path primary-next-hop 172.16.204.2

set protocols mpls path secondary-next-hop 172.16.205.2

 

 

PE2

 

set protocols mpls label-switched-path pe2-pe1 to x.x.x.x

set protocols mpls label-switched-path pe2-pe1 primary primary-next-hop

set protocols mpls label-switched-path pe2-pe1 revert-timer 5

set protocols mpls label-switched-path pe2-pe1 secondary secondary-next-hop standby

set protocols mpls path primary-next-hop 172.16.204.1

set protocols mpls path secondary-next-hop 172.16.205.1

 

For more information, check the document: Primary, Secondary and static LSP configuration.

Modification History

2024-08-30 : Article Created