Enabling an MPLS Device to Dynamically Establish a BFD Session

A dynamic BFD session that monitors both the primary and FRR LSPs can be established only after an MPLS device is enabled to dynamically establish the BFD session.

Procedure

Perform the following steps on the ingress:
1. Run system-view
  The system view is displayed.
2. Run bfd
  BFD is globally enabled.
3. Run quit
  The system view is displayed.
4. Run mpls
  The MPLS view is displayed.
5. Run mpls bfd enable
  The capability of dynamically establishing a BFD session is configured on the ingress.
  
  The mpls bfd enable command does not create a BFD session.
6. Run commit
  The configuration is committed.
Perform the following steps on the egress:
1. Run system-view
  The system view is displayed.
2. Run bfd
  BFD is globally enabled, and the BFD view is displayed.
3. Run mpls-passive
  The capability of passively creating a BFD session is configured on the egress.
  
  The mpls-passive command does not create a BFD session. The egress has to receive an LSP ping request carrying a BFD TLV before creating a BFD session with the ingress.
4. Run commit
  The configuration is committed.