Configuring RSVP Setup Protection
You can configure the facility-backup fast reroute mechanism to provide setup protection for LSPs which are in the process of being signaled. Both point-to-point LSPs and point-to-multipoint LSPs are supported. This feature is applicable in the following scenario:
- A failed link or node is present on the strict explicit path of an LSP before the LSP is signaled.
- There is also a bypass LSP protecting the link or node.
- RSVP signals the LSP through the bypass LSP. The LSP appears as if it was originally set up along its primary path and then failed over to the bypass LSP because of the link or node failure.
- When the link or node has recovered, the LSP can be automatically reverted to the primary path.
You should configure the setup-protection statement at the [edit protocols rsvp] on each of the routers along the LSP path on which you want to enable LSP setup protection. You should also configure IGP traffic engineering on all of the routers on the LSP path. You can issue a show rsvp session command to determine whether or not the LSP has setup protection enabled on a router acting as a point of local repair (PLR) or a merge point.
To enable RSVP setup protection, include the setup-protection statement
You can include this statement at the following hierarchy levels:
- [edit protocols rsvp]
- [edit logical-systems logical-system-name protocols rsvp]
