Enabling an MPLS Device to Dynamically Establish a BGP BFD Session
Context
Before a dynamic BGP BFD session is established, the capability to dynamically establish BGP BFD sessions must be enabled on each MPLS device.
Procedure
Perform the following steps on the ingress of an E2E BGP tunnel:
Run system-view
The system view is displayed.
Run bfd
BFD is enabled globally, and the BFD view is displayed
Run quit
Return to the system view.
Run mpls
The MPLS view is displayed.
Run mpls bgp bfd enable
The ability to dynamically establish BGP BFD sessions is enabled on the ingress.
The mpls bgp bfd enable command does not create a BFD session. A BGP BFD session can only be dynamically established only after a policy for dynamically establish BGP BFD session is configured.
Perform the following steps on the egress of an E2E BGP tunnel:
Run system-view
The system view is displayed.
Run bfd
BFD is enabled globally, and the BFD view is displayed.
Run mpls-passive
The capability of passively creating a BFD session is configured on the egress.
The mpls-passive command does not create a BGP BFD session. The egress has to receive an LSP ping request carrying a BFD TLV before creating a BGP BFD session with the ingress.