Service Manual

graceful-restart ietf
Enable graceful restart on an IS-IS router.
Syntax
graceful-restart ietf
To return to the default, use the no graceful-restart ietf command.
Parameters
ietf Enter ietf to enable graceful restart on the IS-IS router.
Defaults Graceful restart disabled.
Command Modes ROUTER ISIS
Command History
This guide is platform-specic. 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
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
9.7(0.0) Introduced on the S6000-ON.
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.
6.3.1.0 Introduced on the E-Series.
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.
800
Intermediate System to Intermediate System (IS-IS)