Applicable only for normal Areas. Allows for the creation of a virtual link for this area. OSPFv3 requires that all areas attach directly to Area 0.0.0.0 but not that the attachment be physical. One can take any physical arrangement of areas and attach them logically through OSPFv3 virtual links. Specifies the Loopback interface IP Address of the NE to terminate the virtual link. This NE should have an interface that is connected to Area 0.0.0.0 and a non 0.0.0.0 Area. Note: A virtual link must be configured on both NEs. Virtual links cannot be established through Area 0.0.0.0, stub, totallyStub, nssa or nssaTotallyStub type areas. The IP address of 0.0.0.0 means no virtual link.