Administrator Guide

Version Description
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 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.
778 Intermediate System to Intermediate System (IS-IS)