Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 267)

FIGURE 24 Defining OSPF virtual links within a network
The example shows an OSPF area border router, Device A, that is cut off from the backbone area (area
0). To provide backbone access to Device A, you can add a virtual link between Device A and Device C
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 Device A, enter the following commands.
device A(config)# router ospf
device A(config-ospf-router)# area 2
device A(config-ospf-router)# area 1
device A(config-ospf-router)# area 1 virtual-link 209.157.22.1
device A(config-ospf-router)# write memory
Enter the following commands to configure the virtual link on Device C.
device C(config)# router ospf
device C(config-ospf-router)# area 0
device C(config-ospf-router)# area 1
device C(config-ospf-router)# area 1 virtual-link 10.0.0.1
Syntax: [no] area { ip-addr | num } [ virtual-link router-id [ authentication-key string | dead-interval
num | hello-interval num | retransmit-interval num | transmit-delay num | md5-authentication key-
activation-wait-time num | md5-authentication key-id num key [ 0 | 1 ] string ] ]
The area ip-addr and num parameters specify the transit area.
The virtual-link 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 device, enter the show ip command.
OSPFv2
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