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Implementing OSPF on Cisco IOS XR Software
How to Implement OSPF on Cisco IOS XR Software
RC-224
Cisco IOS XR Routing Configuration Guide
OL-14356-01
Non-Stop Forwarding enabled
Note For a description of each output display field, see the show ospf command in the OSPF Commands on
Cisco IOS XR Software module in the Cisco IOS XR Routing Command Reference document.
Configuring Nonstop Forwarding Specific to Cisco for OSPF Version 2
This task explains how to configure OSPF NSF specific to Cisco on your NSF-capable router. This task
is optional.
Prerequisites
OSPF NSF requires that all neighbor networking devices be NSF aware, which happens automatically
after you install the Cisco IOS XR image on the router. If an NSF-capable router discovers that it has
non-NSF-aware neighbors on a particular network segment, it disables NSF capabilities for that
segment. Other network segments composed entirely of NSF-capable or NSF-aware routers continue to
provide NSF capabilities.
See the “Nonstop Forwarding for OSPF Version 2” section on page RC-187 for conceptual information.
Restrictions
The following are restrictions when configuring nonstop forwarding:
• 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. nsf cisco
or
nsf cisco enforce global
5. nsf interval seconds
6. end
or
commit