The following are restrictions when configuring nonstop forwarding:Note
•
OSPF Cisco NSF for virtual links is not supported.
•
Neighbors must be NSF aware.
SUMMARY STEPS
1.
configure
2.
router ospf process-name
3.
router-id { router-id }
4.
Do one of the following:
•
nsf cisco
•
nsf cisco enforce global
5.
nsf interval seconds
6.
nsfflush-delay-timeseconds
7.
nsflifetimeseconds
8.
nsfietf
9.
commit
DETAILED STEPS
PurposeCommand or Action
configure
Step 1
Enables OSPF routing for the specified routing process and places
the router in router configuration mode.
router ospf process-name
Example:
RP/0/RSP0/CPU0:router(config)# router
ospf 1
Step 2
The process-name argument is any alphanumeric string
no longer than 40 characters.
Note
Configures a router ID for the OSPF process.
router-id { router-id }
Step 3
Example:
RP/0/RSP0/CPU0:router(config-ospf)#
router-id 192.168.4.3
We recommend using a stable IPv4 address as the router
ID.
Note
Enables Cisco NSF operations for the OSPF process.Do one of the following:
Step 4
•
nsf cisco
•
Use the nsf cisco command without the optional enforce and
global keywords to abort the NSF restart mechanism on the
•
nsf cisco enforce global
interfaces of detected non-NSF neighbors and allow NSF
neighbors to function properly.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
382 OL-30423-03
Implementing OSPF
Configuring Nonstop Forwarding Specific to Cisco for OSPF Version 2
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