Cisco ASR 9000 Series Routing Configuration Guide

PurposeCommand or Action
Enables IS-IS routing for the specified routing instance, and places the
router in router configuration mode.
router isis instance-id
Example:
RP/0/RSP0/CPU0:router(config)# router
isis isp
Step 2
•
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.nsf { cisco | ietf }
Step 3
Example:
RP/0/RSP0/CPU0:router(config-isis)# nsf
ietf
•
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.
nsf interface-expires number
Example:
RP/0/RSP0/CPU0:router(config-isis)# nsf
interface-expires 1
Step 4
•
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.
nsf interface-timer seconds
Example:
RP/0/RSP0/CPU0:router(config-isis) nsf
interface-timer 15
Step 5
Configures the maximum route lifetime following an NSF restart.
nsf lifetime seconds
Step 6
Example:
RP/0/RSP0/CPU0:router(config-isis)# nsf
lifetime 20
•
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.
commit
Step 7
(Optional) Displays the entire contents of the currently running
configuration file or a subset of that file.
show running-config [ command ]
Example:
RP/0/RSP0/CPU0:router# show
running-config router isis isp
Step 8
• 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 5.3.x
369
Implementing IS-IS
Configuring Nonstop Forwarding for IS-IS

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model