Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual page 404

JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide
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Configuring Global IS-IS Parameters
Specify a previously configured IS-IS routing process to access Router
Configuration mode. (For information about enabling IS-IS on the router, see
"Enabling IS-IS for IP Routing" on page 341.)
host1(config)#router isis engineering
host1(config-router)#
Enable the IS-IS graceful restart mechanism for the router.
host1(config-router)#nsf ietf
(Optional) Configure one or more of the following timing parameters for the
restarting router:
Set the maximum time in seconds that the router waits before completing
the restart process.
host1(config-router)#nsf interface wait 30
Set the time interval in seconds between restart requests sent by the router.
host1(config-router)#nsf t1 interval 60
Set the number of times that the router resends unacknowledged restart
requests.
host1(config-router)#nsf t1 retry-times 3
Set the maximum time in seconds that the router waits for the LSP database
to synchronize. You must configure this parameter separately for each IS-IS
level at which the router operates.
host1(config-router)#nsf t2 level-1 70
host1(config-router)#nsf t2 level-2 50
Set the maximum time in seconds that the restarting router waits before
setting the overload bit to indicate that the graceful restart operation has
failed. You can use either of the following methods:
Set the wait time manually to the specified number of seconds.
host1(config-router)#nsf t3 manual 80
Specify that router obtain the wait time from neighboring IS-IS routers
to which it has active adjacencies.
host1(config-router)#nsf t3 adjacency
(Optional) Issue the show isis nsf command from Privileged Exec mode to verify
the graceful restart configuration.
host1(config-router)#exit
host1(config)#exit
host1#show isis nsf