Configuring Nonstop Forwarding For Is-Is - Cisco ASR 9000 Series Configuration Manual

Configuring Nonstop Forwarding for IS-IS

Command or Action
Example:
RP/0/RSP0/CPU0:router# show isis lsp-log
Step 19 show isis database-log [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router# show isis database-log
level 1
Configuring Nonstop Forwarding for IS-IS
This task explains how to configure your router with NSF that allows the Cisco IOS XR software to
resynchronize the IS-IS link-state database with its IS-IS neighbors after a process restart. The process restart
could be due to an:
• RP failover (for a warm restart)
• Simple process restart (due to an IS-IS reload or other administrative request to restart the process)
• IS-IS software upgrade
In all cases, NSF mitigates link flaps and loss of user sessions. This task is optional.
SUMMARY STEPS
1. configure
2. router isis instance-id
3. nsf { cisco | ietf }
4. nsf interface-expires number
5. nsf interface-timer seconds
6. nsf lifetime seconds
7. commit
8. show running-config [ command ]
DETAILED STEPS
Command or Action
Step 1
configure
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
300
Purpose
(Optional) Display IS-IS database log information.
Purpose
Implementing IS-IS
OL-30423-03