Users Guide

Version Description
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
Every graceful restart enabled router’s HELLO PDUs includes a restart TLV. This restart enables (re)starting as well
as the existing ISIS peers to detect the GR capability of the routers on the connected network. A ag in the
Restart TLV contains restart request (RR), restart acknowledge (RA) and suppress adjacency advertisement (SA)
bit ags.
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.
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
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
graceful-restart t1
Set the graceful restart wait time before unacknowledged restart requests are generated. This wait time is the interval before the system
sends a restart request (an IIH with RR bit set in Restart TLV) until the CSNP is received from the helping router.
Syntax
graceful-restart t1 {interval seconds | retry-times value}
To return to the default, use the no graceful-restart t1 command.
Parameters
interval Enter the keyword interval to set the wait time. The range is from 5 to 120 seconds.
The default is 5 seconds.
retry-times Enter the keywords retry-times to set the number of times the request interval is
extended until a CSNP is received from the helping router. The range is from 1 to 10
attempts. The default is 1.
778 Intermediate System to Intermediate System (IS-IS)