Configuring OSPF | Configuring OSPF |
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Creating Virtual Links
A virtual link is a link between two backbones through a transit area. Use the ip ospf
Accepted network design theory states that virtual links are the option of last resort. For more information on virtual links, see “Virtual Links” on page
Creating a Virtual Link
To create a virtual link, commands must be submitted to the routers at both ends of the link. The router being configured should point to the other end of the link, and both routers must have a common area.
When entering the ip ospf
For example, a virtual link needs to be created between Router A (router ID 1.1.1.1) and Router B (router ID 2.2.2.2). We must:
1Establish a transit area between the two routers using the commands discussed in “Creating an OSPF Area” on page
2Then use the ip ospf
ip ospf
3Next, enter the following command on Router B:
ip ospf
Now there is a virtual link across Area 0.0.0.1 linking Router A and Router B.
4To display virtual links configured on a router, enter the following show command:
show ip ospf
5To delete a virtual link, enter the ip ospf
no ip ospf
Modifying Virtual Link Parameters
There are several parameters for a virtual link (such as authentication type and cost) that can be modified at the time of the link creation. They are described in the ip ospf
OmniSwitch 6600 Family Advanced Routing Configuration Guide March 2005 | page |
