Configuring Dynamic IGP and EGP IP Routing Protocols

All dynamic IP routing protocols are configured as IOS subprocesses, much the same way a router interface is configured. The <router [protocol] [process id]> global configuration command enables the process:

asbr-a1#config t
asbr-a1(configure)#router ospf 89
asbr-a1(config-router)#network area

After a process is enabled, it does not become active until a <network [IP network address]> statement that corresponds to a configured router interface is added to the subprocess.

After the process is configured, you need to add each directly connected network that you wish the protocol to announce. If the network is not addedto the process, ...

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