Graceful Restart Hello Delay (sec) | Enter the Graceful Restart Hello Delay (in
seconds), which applies to an OSPF interface when Active/Passive High
Availability is configured. Graceful Restart Hello Delay is the
length of time during which the firewall sends Grace LSA packets
at 1-second intervals. During this time, no hello packets are sent
from the restarting firewall. During the restart, the dead timer
(which is the Hello Interval multiplied by the Dead Count) is also
counting down. If the dead timer is too short, the adjacency will
go down during the graceful restart because of the hello delay.
Therefore, it is recommended that the dead timer be at least four times
the value of the Graceful Restart Hello Delay. For example, a Hello
Interval of 10 seconds and a Dead Count of 4 yield a dead timer
of 40 seconds. If the Graceful Restart Hello Delay is set to 10
seconds, that 10-second delay of hello packets is comfortably within
the 40-second dead timer, so the adjacency will not time out during
a graceful restart. Range is 1 to 10; default is 10. |