Administrator Guide

network. A flag in the Restart TLV contains restart request (RR), restart acknowledge (RA) and suppress
adjacency advertisement (SA) bit flags.
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.
C9000 Series
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 from 1 to 20 minutes. The
default is 5 minutes.
Defaults 5 minutes
Command Modes ROUTER ISIS
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.5(0.1) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.3.11.1 Introduced on the Z9000.
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.
C9000 Series
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 from 5 to 300 seconds.
The default is 30 seconds.
Intermediate System to Intermediate System (IS-IS) 825