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The range is from 1 to 120 minutes.
The default is 5 minutes.
•
Enable the graceful restart maximum wait time before a restarting peer comes up.
ROUTER-ISIS mode
graceful-restart restart-wait seconds
When implementing this command, be sure to set the t3 timer to adjacency on the restarting router.
The range is from 1 to 120 minutes.
The default is 30 seconds.
•
Configure the time that the graceful restart timer T1 defines for a restarting router to use for each
interface. This time is an interval before regenerating Restart Request (an IIH with RR bit set in Restart TLV)
after waiting for an acknowledgement.
ROUTER-ISIS mode
graceful-restart t1 {interval seconds | retry-times value}
•
interval: wait time (the range is from 5 to 120. The default is 5.)
•
retry-times: number of times an unacknowledged restart request is sent before the restarting
router gives up the graceful restart engagement with the neighbor. (The range is from 1 to 10
attempts. The default is 1.)
•
Configure the time for the graceful restart timer T2 that a restarting router uses as the wait time for each
database to synchronize.
ROUTER-ISIS mode
graceful-restart t2 {level-1 | level-2} seconds
•
level-1, level-2: identifies the database instance type to which the wait interval applies.
The range is from 5 to 120 seconds.
The default is 30 seconds.
•
Configure the graceful restart timer T3 to set the time the restarting router uses as an overall maximum
time to wait for database synchronization to complete.
ROUTER-ISIS mode
graceful-restart t3 {adjacency | manual seconds}
•
adjacency: the restarting router receives the remaining time value from its peer and adjusts its T3
value so if user has configured this option.
•
manual: allows you to specify a fixed value that the restarting router should use.
The range is from 50 to 120 seconds.
The default is 30 seconds.
Example of the show isis graceful-restart detail and show isis interface Commands
NOTE:
If this timer expires before the synchronization has completed, the restarting router sends the
overload bit in the LSP. The 'overload' bit is an indication to the receiving router that database
synchronization did not complete at the restarting router.
Intermediate System to Intermediate System
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Troubleshooting
