Foundry Networks FESX User Manual

Configuring OSPF
December 2005 © Foundry Networks, Inc. 20 - 19
Figure 20.6 Defining OSPF virtual links within a network
EXAMPLE:
Figure 20.6 shows an OSPF area border router, FastIronA, that is cut off from the backbone area (area 0). To
provide backbone access to FastIronA, you can add a virtual link between FastIronA and FastIronC 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 FastIronA, enter the following commands:
FESX424 RouterA(config-ospf-router)# area 1 virtual-link 209.157.22.1
FESX424 RouterA(config-ospf-router)# write memory
Enter the following commands to configure the virtual link on FastIronC:
FESX424 RouterC(config-ospf-router)# area 1 virtual-link 10.0.0.1
FESX424 RouterC(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 20-20 for descriptions of the optional parameters.
OSPF Area 2
OSPF Area 0
OSPF Area 1
transit area
FESXC
Router ID 209.157.22.1
FESXB
Router ID 10.0.0.1
FESXA

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English