Chapter 13 Routing Protocols
Figure 202 OSPF: Virtual Link
In this example, area 100 does not have a direct connection to the backbone. As a result, you should set up a virtual link on both ABR in area 10. The virtual link becomes the connection between area 100 and the backbone.
You cannot create a virtual link to a router in a different area.
OSPF Configuration
Follow these steps when you configure OSPF on the ZyWALL.
1Enable OSPF.
2Set up the OSPF areas.
3Configure the appropriate interfaces. See Section 10.4.1 on page 207.
4Set up virtual links, as needed.
13.3.1Configuring the OSPF ScreenUse the first OSPF screen to specify the OSPF router the ZyWALL uses in the OSPF AS and maintain the policies for redistribution. In addition, it provides a summary of OSPF areas, allows you to remove them, and opens the OSPF Add/Edit screen to add or edit them.
To access this screen, login to the web configurator. When the main screen appears, click once on Network > Routing > OSPF to open the following screen.
Figure 203 Network > Routing > OSPF
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