Enabling High Availability Features

Verifying OSPF NSF

To verify NSF for OSPF, you must check that the NSF function is configured on the SSO-enabled networking device. Perform the following steps:

Step 1

Verify that “nsf” appears in the OSPF configuration of the SSO-enabled device by entering the show

 

running-config command:

 

Router# show running-config

 

router ospf 120

 

log-adjacency-changes

 

nsf

 

network 192.168.20.0 0.0.0.255 area 0

 

network 192.168.30.0 0.0.0.255 area 1

 

network 192.168.40.0 0.0.0.255 area 2

Step 2

Use the show ip ospf command to verify that NSF is enabled on the device:

 

Router> show ip ospf

 

Routing Process "ospf 1" with ID 192.168.2.1 and Domain ID 0.0.0.1

 

Supports only single TOS(TOS0) routes

 

Supports opaque LSA

 

SPF schedule delay 5 secs, Hold time between two SPFs 10 secs

 

Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs

 

Number of external LSA 0. Checksum Sum 0x0

 

Number of opaque AS LSA 0. Checksum Sum 0x0

 

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

 

 

Verifying IS-IS NSF

 

To verify NSF for IS-IS, you must check that the NSF function is configured on the SSO-enabled

 

networking device. Perform the following steps:

 

 

Step 1

Verify that “nsf” appears in the IS-IS configuration of the SSO-enabled device by entering the show

 

running-configcommand. The display will show either Cisco IS-IS or IETF IS-IS configuration. The

 

following display indicates that the device uses the Cisco implementation of IS-IS NSF:

 

Router# show running-config

 

router isis

 

nsf cisco

Step 2

If the NSF configuration is set to cisco, use the show isis nsf command to verify that NSF is enabled on

 

the device. Using the Cisco configuration, the display output will be different on the active and standby

 

RSPs. The following display shows sample output for the Cisco configuration on the active RSP.

 

In this example, note the presence of “NSF restart enabled”:

 

Router# show isis nsf

 

NSF is ENABLED, mode 'cisco'

Route Switch Processor (RSP8) Installation and Configuration Guide

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Cisco Systems RSP8 manual Verifying Ospf NSF, Verifying IS-IS NSF, Running-config command