Configuring CR-LSP Backup Parameters

Procedure

1. Run system-view

   The system view is displayed.

2. Run interface tunnel tunnel-number

   The view of the MPLS TE tunnel interface is displayed.

3. Establish a primary RSVP-TE tunnel.
4. Run mpls te backup hot-standby [ mode { revertive [ wtr interval ] | non-revertive } | overlap-path | wtr [ interval ] | dynamic-bandwidth ]

   The mode of establishing a backup CR-LSP is configured.

   Select the following parameters as needed to enable sub-functions:

   • mode revertive [ wtr interval ]: enables a device to switch traffic back to the primary CR-LSP.

   • mode non-revertive: disables a device from switching traffic back to the primary CR-LSP.

   • overlap-path: allows a hot-standby CR-LSP to overlap the primary CR-LSP if no available path is provided for the hot-standby CR-LSP.

   • wtr interval: sets the time before a traffic switchback is performed.

   • dynamic-bandwidth: enables a hot-standby CR-LSP to obtain bandwidth resources only after the hot-standby CR-LSP takes over traffic from a faulty primary CR-LSP. This function helps efficiently use network resources and reduce network costs.

   

   The bypass and backup tunnels cannot be configured on the same tunnel interface. The mpls te bypass-tunnel and mpls te backup commands cannot be configured on the same tunnel interface. Also, the mpls te protected-interface and mpls te backup commands cannot be configured on the same tunnel interface.

5. (Optional) Run mpls te path explicit-path path-name secondary

   An explicit path is specified for the backup CR-LSP.

   

   The mpls te path explicit-path path-name secondary and mpls te backup commands must be configured simultaneously.

6. (Optional) Run mpls te affinity property properties [ mask mask-value ] secondary

   An affinity is set for the backup CR-LSP.

7. (Optional) Run mpls te hop-limit hop-limit-value secondary

   A hop limit value is set for the backup CR-LSP.

   

   mpls te hop-limit hop-limit-value secondary and mpls te backup commands must be configured simultaneously.

8. (Optional) Run mpls te backup hot-standby overlap-path

   The path overlapping function is configured for the hot-standby CR-LSP.

9. (Optional) Run mpls te backup hot-standby dynamic-bandwidth

   The dynamic bandwidth adjustment function is enabled for the hot-standby CR-LSP.

   This function enables a hot-standby CR-LSP to obtain bandwidth resources only after the hot-standby CR-LSP takes over traffic from a faulty primary CR-LSP. This function helps efficiently use network resources and reduce network costs.

10. Run commit

    The configuration is committed.