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WGS3 Layer 3 Switch User’s Manual
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4.5.6.2.3.3 OSPF Virtual Link Configuration
All OSPF areas must connect to the backbone. If an area does not have a direct physical connection to
the backbone, you can configure a virtual link that provides a logical path to the backbone. To connect an
isolated area to the backbone, the logical path can cross a single nonbackbone area to reach the
backbone. To define the path, you must specify one endpoint on the ABR that connects the isolated area
to the common nonbackbone area, and the other endpoint on the ABR that connects this common
nonbackbone area and the backbone itself. (However, note that you cannot configure a virtual link that
runs through a stub or NSSA area.)
Virtual links can also be used to create a redundant link between any area and the backbone to help
prevent partitioning, or to connect two existing backbone areas into a common backbone.
To configure a virtual link, specify the transit area through which the endpoint routers connect, and the
address of the router on this side of the link.
Parameter Description
Area ID An identifier for the transit area the virtual link crosses
Neighbor IP The IP address of the OSPF router on this end of the virtual link.