5.5 Meeting the Backbone Area Requirements
5.5.2 Configuring virtual links
Lab Activity
  In this lab, you will learn how to configure OSPF Virtual Links.
 

To configure a virtual link, perform the following steps:

  1. Configure OSPF, as described in the "Configuring OSPF ABRs" section.
  2. On each router that will use the virtual link, create the "virtual link" configuration. The routers that make the links are the ABR that connects the remote area to the transit area and the ABR that connects the transit area to the backbone area.

router(config-router)#area area-id virtual-link router-id

If you do not know the neighbor's Router ID, you can Telnet to it and type the show ip ospf command. The results are shown in the main figure.