Dell PowerConnect B-RX Configuration Manual page 765

NOTE
When you establish an area virtual link, you must configure it on both of the routers (both ends of
the virtual link).
FIGURE 106
Example
Figure 106
(area 0). To provide backbone access to BigIron RXA, you can add a virtual link between BigIron
RXA and BigIron RXC using area 1 as a transit area. To configure the virtual link, you define the link
on the router that is at each end of the link. No configuration for the virtual link is required on the
routers in the transit area.
To define the virtual link on BigIron RXA, enter the following commands.
BigIron RXA(config)#router ospf
BigIron RXA(config-ospf-router)# area 2
BigIron RXA(config-ospf-router)# area 1
BigIron RXA(config-ospf-router)# area 1 virtual-link 209.157.22.1
BigIron RXA(config-ospf-router)# write memory
Enter the following commands to configure the virtual link on BigIron RXC.
BigIron RXC(config)#router ospf
BigIron RXC(config-ospf-router)# area 0
BigIron RXC(config-ospf-router)# area 1
BigIron RXC(config-ospf-router)# area 1 virtual-link 10.0.0.1
Syntax: [no] area <ip-addr> | <num> virtual-link <router-id>
BigIron RX Series Configuration Guide
53-1001810-01
Defining OSPF virtual links within a network
BigIronC
Router ID 209.157.22.1
shows an OSPF area border router, BigIron RXA, that is cut off from the backbone area
[authentication-key | dead-interval | hello-interval | retransmit-interval | transmit-delay
OSPF Area 0
OSPF Area 1
"transit area"
BigIronB
25
Configuring OSPF
OSPF Area 2
BigIronA
Router ID 10.0.0.1
693