Configuring SBFD for SR-MPLS TE Tunnel

This section describes how to configure SBFD to detect SR-MPLS TE tunnel faults.

Usage Scenario

If SBFD for SR-MPLS TE tunnel detects a fault on the primary tunnel, traffic is rapidly switched to the backup tunnel, which minimizes the impact on traffic.

Pre-configuration Tasks

Before configuring SBFD for SR-MPLS TE tunnel, complete the following task:

Configure an SR-MPLS TE tunnel.
Set each LSR ID using the mpls lsr-id lsr-id command. Ensure that the route to the local lsr-id is reachable.

Procedure

Configure an SBFD initiator.
1. Run system-view
  The system view is displayed.
2. Run bfd
  BFD is enabled globally.
  
  You can set BFD parameters only after running the bfd command to enable global BFD.
3. Run quit
  Return to the system view.
4. Run sbfd
  SBFD is enabled globally.
5. Run quit
  Return to the system view.
6. Run interface tunnel tunnel-number
  The SR-MPLS TE tunnel interface view is displayed.
7. Run mpls te bfd tunnel enable seamless
  SBFD for SR-MPLS TE tunnel is enabled.
  
  After the configuration is complete, the SBFD initiator automatically establishes an SBFD session destined for the destination IP address of an SR-MPLS TE tunnel.
8. Run commit
  The configuration is committed.
Configure the SBFD reflector.
1. Run system-view
  The system view is displayed.
2. Run bfd
  BFD is enabled globally.
  
  You can set BFD parameters only after running the bfd command to enable global BFD.
3. Run quit
  Return to the system view.
4. Run sbfd
  SBFD is enabled globally.
5. Run reflector discriminator { unsigned-integer-value | ip-address-value }
  The discriminator of an SBFD reflector is configured.
6. Run commit
  The configuration is committed.

Checking the Configurations

After you configure SBFD for SR-MPLS TE tunnel, run the display bfd session { all | discriminator discr-value } [ verbose ] command to check information about the SBFD session that monitors an SR-MPLS TE tunnel.