Cisco ASR 9000 Series Configuration Manual page 329

Implementing IS-IS
Command or Action
Step 2
router isis instance-id
Example:
RP/0/RSP0/CPU0:router(config)# router
isis isp
Step 3 nsf { cisco | ietf }
Example:
RP/0/RSP0/CPU0:router(config-isis)# nsf
ietf
Step 4 nsf interface-expires number
Example:
RP/0/RSP0/CPU0:router(config-isis)# nsf
interface-expires 1
Step 5 nsf interface-timer seconds
Example:
RP/0/RSP0/CPU0:router(config-isis) nsf
interface-timer 15
Step 6 nsf lifetime seconds
Example:
RP/0/RSP0/CPU0:router(config-isis)# nsf
lifetime 20
Step 7
commit
Step 8 show running-config [ command ]
Example:
RP/0/RSP0/CPU0:router# show
running-config router isis isp
OL-30423-03
Purpose
Enables IS-IS routing for the specified routing instance, and places the
router in router configuration mode.
• You can change the level of routing to be performed by a particular
routing instance by using the is-type router configuration
command.
Enables NSF on the next restart.
• Enter the cisco keyword to run IS-IS in heterogeneous networks
that might not have adjacent NSF-aware networking devices.
• Enter the ietf keyword to enable IS-IS in homogeneous networks
where all adjacent networking devices support IETF draft-based
restartability.
Configures the number of resends of an acknowledged NSF-restart
acknowledgment.
• If the resend limit is reached during the NSF restart, the restart
falls back to a cold restart.
Configures the number of seconds to wait for each restart
acknowledgment.
Configures the maximum route lifetime following an NSF restart.
• This command should be configured to the length of time required
to perform a full NSF restart because it is the amount of time that
the Routing Information Base (RIB) retains the routes during the
restart.
• Setting this value too high results in stale routes.
• Setting this value too low could result in routes purged too soon.
(Optional) Displays the entire contents of the currently running
configuration file or a subset of that file.
• Verify that "nsf" appears in the IS-IS configuration of the
NSF-aware device.
• This example shows the contents of the configuration file for the
"isp" instance only.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
Configuring Nonstop Forwarding for IS-IS
301