KB.15.15

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.

The no form removes the virtual link.

Example 143 Configuring a virtual link

Figure 21 (page 223) 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, define it on the routers that are at each end of the link. No configuration

for the virtual link is required on the other routers on the path through the transit area (such as

routing switch "B" in this example).

Figure 21 Defining OSPFv3 virtual links within a network

To configure the virtual link on routing switch "A," enter the following command specifying the

area 1 interface on routing switch "C":

HP 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."

HP Switch(ospf3)# area 1 virtual-link 10.0.0.1

For descriptions of virtual link interface parameters you can either use in their default settings or

reconfigure as needed, see “About adjusting virtual link performance by changing the interface

settings” (page 261).

Adjusting a dead interval on a virtual link

For more information, see “About adjusting virtual link performance by changing the interface

settings” (page 261).

Configuring a virtual link 223