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Processing the Restart Cap Object
The following assumptions are made about a neighbor based on the Restart Cap object (assuming that a control channel failure can be distinguished unambiguously from a node restart):
- A neighbor that does not advertise the Restart Cap object in its hello messages cannot assist a router with state or label recovery, nor can it perform an RSVP graceful restart.
- After a restart, a neighbor advertising a Restart Cap object with a restart time equal to any value and a recovery time equal to 0 has not preserved its forwarding state. When a recovery time equals 0, the neighbor is considered dead and any states related to this neighbor are purged, regardless of the value of the restart time.
- After a restart, a neighbor advertising its recovery time with a value other than 0 can keep or has kept the forwarding state. If the local router is helping its neighbor with restart or recovery procedures, it sends a Recover Label object to this neighbor.
