The unlimited-negotiate command enables unlimited negotiation for a multicast BFD session.
The undo unlimited-negotiate command disables unlimited negotiation for a multicast BFD session.
By default, unlimited negotiation is disabled for a multicast BFD session.
If a multicast BFD session is bound to a Layer 3 interface to which the line protocol current state of the interface is Down, the status of the session is set to Down. You can run the unlimited-negotiate command to restart session negotiation. If the link is normal, the session can go Up through negotiation.