Cisco Catalyst 4500 Series - Configuring IS-IS NSF

13-14
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 13 Configuring Cisco NSF with SSO Supervisor Engine Redundancy
Configuring NSF with SSO Supervisor Engine Redundancy
Number of DCbitless external and opaque AS LSA 0
Number of DoNotAge external and opaque AS LSA 0
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
External flood list length 0
Non-Stop Forwarding enabled, last NSF restart 00:02:06 ago (took 44 secs)
Area BACKBONE(0)
Number of interfaces in this area is 1 (0 loopback)
Area has no authentication
SPF algorithm executed 3 times
Configuring IS-IS NSF
To configure IS-IS NSF, perform this task:
Command Purpose
Step 1
Switch# configure terminal
Enters global configuration mode.
Step 2
Switch(config)# router isis [tag]
Enables an IS-IS routing process, which places the
switch in router configuration mode.
Step 3
Switch(config-router)# nsf [cisco | ietf]
Enables NSF operation for IS-IS.
Enter the ietf keyword to enable IS-IS in a
homogeneous network where adjacencies with
networking devices supporting IETF draft-based
restartability is guaranteed.
Enter the cisco keyword to run IS-IS in
heterogeneous networks that might not have
adjacencies with NSF-aware networking devices.
Step 4
Switch(config-router)# nsf interval [minutes]
(Optional) Specifies the minimum time between
NSF restart attempts. The default time between
consecutive NSF restart attempts is 5 minutes.
Step 5
Switch(config-router)# nsf t3 {manual [seconds] |
adjacency}
(Optional) Specifies the time IS-IS waits for the
IS-IS database to synchronize before generating
overloaded link-state information for itself and
flooding that information out to its neighbors.
The t3 keyword applies only if you selected IETF
operation. When you specify adjacency, the switch
that is restarting obtains its wait time from
neighboring devices.
Step 6
Switch(config-router)# nsf interface wait seconds
(Optional) Specifies how long an IS-IS NSF restart
waits for all interfaces with IS-IS adjacencies to
come up before completing the restart. The default
is 10 seconds.