Command
Router-Id
Use
This command manually sets the router-id used by OSPF. If it is not set, OSPF will automatically set its router-id to be the highest loopback IP address or the highest IP address (if no loopback interfaces are present). One thing to note is, even though the router-id is based on an IP address, it can be set to any 32 bit number in an IP address format. For example: 255.255.255.255 is an acceptable router-id.
Syntax
Router(config-router)#router-id <ip address>
Example
In this example we will change R1’s router-id to 10.1.1.1.
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R1(config)#router ospf 1 |
We can now see that, on R2, the change has taken effect.
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R2(config-router)#do show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface |
