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| Sun Ethernet Fabric Operating System ### OSPF Administration Guide

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## Configure the Router ID

The router ID that you configure must be one of the IP addresses of the IP interfaces configured in the switch.

You can configure an arbitrary value for the IP address for each router. However, each router ID must be unique. To ensure uniqueness, the router ID must match with one of the IP interface addresses of the router.

1. Configure the router ID.

       SEFOS# configure terminal
       SEFOS(config)# router ospf
       SEFOS(config-router)# router-id 10.10.2.1
       SEFOS(config-router)# exit

2. Examine the configuration details.

       SEFOS# show ip ospf

       OSPF Router ID 10.10.2.1
       Supports only single TOS(TOS0) route
       ABR Type supported is Standard ABR
       It is an Area Border Router
       Number of Areas in this router is 2
       Area is 0.0.0.6
       Number of interfaces in this area is 1
       SPF algorithm executed 6 times
       Area is 0.0.0.0
       Number of interfaces in this area is 1
       OSPF algorithm executed 6 times

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