MPLS Protection and Restoration Verification Commands

In the Nokia 7750 Service Routers, we can verify the Secondary LSP-Path configuration with the different commands. In this lesson, we will learn these commands one by one. Below, you can find these commands and their roles.

Secondary Path Verification

To verify secondary LSPs use the following commands:

show router mpls lspshow router mpls lsp path

If it is Standby Secondary LSP-Path, the Primary andthe Secondary is up.

If it is Non-Standby Secondary LSP-Path, the Primary is up but the Secondary is down.

To verify the Active path (to see the primary is active) we can use below command on Nokia Service Routers.

show router mpls lsp “path_name” activepath

For detailed secondary lsp path we can use below command on Nokia Service Routers.

show router mpls lsp “path_name” path fully_loose-2 detail

There are seperate RSVP sessions for each standby secondary LSP path. To see this use the following command:

show router RSVP sessions

Here, there is an important point. The primary and the secondary LSP-paths have the same Tunnel ID but different LSP IDs.

One-to-One Backup Verification

Viewing the RSVP sessions for One-to-One Detour tunnels use the “show router rsvp sessions” command on Nokia Service Routers like before tunnel verifications.

You can also use the below commands:

show router rsvp sessions detour (originating detours)

show router rsvp sessions detour-transit (transiting detours)

show router rsvp sessions detour-terminate (terminating detours)

You can see the FRR status of each hop in the LSP Path with the “show router mpls lsp “path_name” path detail” command.

Facility (Many-to-One) Backup Verification

Viewing the RSVP sessions for Facility Bypass tunnels use the “show router rsvp sessions” command on Nokia Service Routers like before tunnel verifications.

To view the Facility Bypass tunnels use the “show router mpls bypass-tunnel detail” command.

To view the list of protected LSPs use the “show router mpls bypass-tunnel protected-lsp detail” command.