Reference Guide

The ISIS graceful restart-enabled router can co-exist in mixed topologies where some routers
are graceful restart-enabled and others are not. For neighbors that are not graceful restart-
enabled, the restarting router brings up the adjacency per the usual methods.
graceful-restart interval
Set the graceful restart grace period, the time during that all graceful restart attempts are prevented.
E-Series, S4810
Syntax
graceful-restart interval minutes
To return to the default, use the no graceful-restart interval command.
Parameters
minutes Enter the graceful-restart interval minutes. The range is 1 to 20
minutes. The default is 5 minutes.
Defaults 5 minutes
Command Modes ROUTER ISIS
Command History
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.1.0 Introduced on the E-Series.
graceful-restart restart-wait
Enable the graceful restart maximum wait time before a restarting peer comes up.
E-Series, S4810
Syntax
NOTE: Set the t3 timer to adjacency on the restarting router when implementing this
command.
graceful-restart restart-wait seconds
To return to the default, use the no graceful-restart restart-wait command.
Parameters
seconds Enter the graceful restart time in seconds. The range is 5 to 300
seconds. The default is 30 seconds.
Defaults 30 seconds
Command Modes ROUTER ISIS
993