Foundry Networks Switch and Router Installation And Configuration Manual page 596

Foundry Switch and Router Installation and Configuration Guide
BigIron
Figure 17.6 Defining OSPF virtual links within a network
USING THE CLI
EXAMPLE:
Figure 17.6 shows an OSPF area border router, BigIronA, that is cut off from the backbone area
(area 0). To provide backbone access to BigIronA, you can add a virtual link between BigIronA and BigIronC
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 BigIronA, enter the following commands:
BigIronA(config-ospf-router)# area 1 virtual-link 209.157.22.1
BigIronA(config-ospf-router)# write memory
Enter the following commands to configure the virtual link on BigIronC:
BigIronC(config-ospf-router)# area 1 virtual-link 10.0.0.1
BigIronC(config-ospf-router)# write memory
Syntax: area <ip-addr> | <num> virtual-link <router-id>
[authentication-key | dead-interval | hello-interval | retransmit-interval | transmit-delay <value>]
The area <ip-addr> | <num> parameter specifies the transit area.
The <router-id> parameter specifies the router ID of the OSPF router at the remote end of the virtual link. To
display the router ID on a Foundry Layer 3 Switch, enter the show ip command.
See "Modify Virtual Link Parameters" on page 17-24 for descriptions of the optional parameters.
17 - 22
OSPF Area 0
BigIronC
Router ID 209.157.22.1
BigIronB
BigIron
OSPF Area 1
"transit area"
BigIron
OSPF Area 2
BigIronA
Router ID 10.0.0.1
December 2000