Reference Guide

Intermediate System to Intermediate System | 507
Configure IS-IS Graceful Restart
To enable IS-IS Graceful Restart globally, use the following command in ROUTER-ISIS mode.
Additional, optional commands can be implemented to enable the Graceful Restart settings.
3 Set the minimum interval between SPF
calculations.
spf-interval [level-l | level-2 |
interval] [initial_wait_interval
[second_wait_interval]]
ROUTER ISIS AF IPV6
This command is used for IPv6 route computation only when multi-topology is enabled. If using single-topology
mode, use the spf-interval command in CONFIG ROUTER ISIS mode to apply to both IPv4 and IPv6 route
computations.
4
Implement a wide metric-style globally.
To configure wide or wide transition metric
style, the cost can be a between 0 and
16,777,215.
isis ipv6 metric metric-value
[level-1 | level-2 | level-1-2]
ROUTER ISIS AF IPV6
Command Syntax Command Mode Purpose
graceful-restart ietf
ROUTER-ISIS Enable Graceful Restart on ISIS processes
graceful-restart
interval minutes
ROUTER-ISIS Configure the period of time during which the Graceful Restart attempt
will be prevented.
Range: 1-120 minutes
Default: 5 minutes
graceful-restart
restart- wait seconds
ROUTER-ISIS Enable the Graceful Restart maximum wait time before a restarting peer
comes up.
Be sure to set the t3 timer to adjacency on the restarting router when
implementing this command.
Range: 5-120 seconds
Default: 30 seconds
graceful-restart t1
{interval seconds |
retry-times value}
ROUTER-ISIS Configure the time that the Graceful Restart timer T1 defines for a
restarting router to use for each interface, as an interval before
regenerating Restart Request (an IIH with RR bit set in Restart TLV) after
waiting for an acknowledgement.
interval: wait time (Range: 5-120, default: 5)
retry-times: number of times an unacknowledged restart request will be
sent before the restarting router gives up the graceful restart engagement
with the neighbor. (Range: 1-10 attempts, default: 1)
graceful-restart t2
{level-1 | level-2}
seconds
ROUTER-ISIS Configure the time for Graceful Restart timer T2 that a restarting router
will use as the wait time for each database to synchronize.
level-1, level-2: identifies the database instance type to which the wait
interval applies.
Range:5-120 seconds
Default: 30 seconds
Step Task Command Syntax Command Mode