Ospf Virtual Link Configuration - Planet Networking & Communication WGS3-2620 User Manual

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
Area ID
Neighbor IP
WGS3 Layer 3 Switch User's Manual
Description
An identifier for the transit area the virtual link crosses
The IP address of the OSPF router on this end of the virtual link.
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