area virtual-link router-id
Syntax
area [area-id
] virtual-link [router-id]
no area [area-id
] virtual-link [router-id]
Description
In the ospf3 context, used on a pair of ABRs at opposite ends of a virtual link in the same area to configure the virtual link connection.
The
no
form removes the virtual link.
Options
area-id
-
This must be the same for both ABRs in the link and is the area number of the virtual link transit area in either decimal or 32-bit dotted decimal format.
If
area-id
is not already configured on the routing switch, this command creates it. router-id
-
On an ABR directly connected to the backbone area, this value must be the router ID of an ABR (in the same area) needing a virtual link to the backbone area as a substitute for a direct physical connection.
On the ABR that needs the virtual link to the backbone area, this value must be the router ID of the ABR (in the same area) having a direct physical connection to the backbone area.
Configuring a virtual link
The following figure shows an OSPFv3 ABR, routing switch "A" that lacks a direct connection to the backbone area (area 0). To provide backbone access to routing switch "A," you can add a virtual link between routing switch "A" and routing switch "C," using area 1 as a transit area.To configure the virtual link on routing switch "A," enter the following command specifying the area 1 interface on routing switch "C":
Switch(ospf3)# area 1 virtual-link 209.157.22.1
To configure the virtual link on routing switch "C," enter the following command specifying the area 1 interface on routing switch "A."
Switch(ospf3)# area 1 virtual-link 10.0.0.1