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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 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.
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