3.8 Virtual Links 3.8.4 Verifying a Virtual Link Configuration Use the show ip ospf virtual-links command to verify that the configured virtual link works properly. Figure describes the fields displayed in the output of this command.Other commands that are useful when troubleshooting virtual links are show ip ospf neighbor, show ip ospf database, and debug ip ospf adj. Routers across a virtual link become adjacent and exchange LSAs via the virtual link, similar to the process over a physical link. Example output from the show ip ospf neighbor and show ip ospf database commands is shown in Figures and , respectively.