OSPF Virtual Link Configuration Example

ospf virtual link

OSPF virtual link is a very important configuration trick, in this article we will look how to configure OSPF virtual link with a little example. After we will see it deeply too.

ospf virtual link

When we are configuring OSPF , we all know that all areas must be connected with Area 0. That means we can’t configure OSPF for a design above. But we are having physical diffuculties, we have a temporariy solution : OSPF Virtual Link !

On a design like this , Router 3 and Router 4 can’t have the network that is connected to Router 2’s E0 interface. To fix this issue, we should configure virtual link between Router – 2 and Router – 3.

R3(config)# router ospf 1
R3(config-router)#area 1 virtual-link
R2(config)# router ospf 1 area 1 virtual-link        // Router - ID of its neighbor //

OSPF virtual link configuration can be verified with the command below. You can’t see it on neighbor table :

R3#show ip ospf virtual-links

Leave a Reply

Your email address will not be published. Required fields are marked *