Brocade Virtual ADX Switch and Router Guide (Supporting ADX v03.1.00) - Manual (Page 132)

118 Brocade Virtual ADX Switch and Router Guide
53-1003246-01
Configuring OSPF
6
NOTE
By default, the Brocade router ID is the IP address configured on the lowest numbered loopback
interface. If the Layer 3 Switch does not have a loopback interface, the default router ID is the lowest
numbered IP address configured on the device. For more information or to change the router ID,
refer to
“Changing the router ID” on page 61.
NOTE
When you establish an area virtual link, you must configure it on both of the routers (both ends of
the virtual link).
FIGURE 24 Defining OSPF virtual links within a network
Example
Figure 24 shows an OSPF area border router, DeviceA, that is cut off from the backbone area (area
0). To provide backbone access to DeviceA, you can add a virtual link between DeviceA and
DeviceC 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.
RouterA(config-ospf-router)# area 1 virtual-link 10.157.22.1
RouterA(config-ospf-router)# write memory
Enter the following commands to configure the virtual link on DeviceC.