Configuration | System | IP Routing | OSPF
8-7
VPN 3000 Concentrator Series User Guide
Figure 8-5: Configuration | System | IP Routing | OSPF screen
Enabled
To enable the VPN Concentrator OSPF router, check the box. (By default it is not checked.) You must
also enter a
Router ID below. You must check this box for OSPF to work on any interface that uses it.
To change a configured
Router ID below, you must disable OSPF here.
To enable OSPF routing on an interface, you must also configure and enable OSPF on the appropriate
Configuration | Interfaces screen.
Router ID
The router ID uniquely identifies the VPN Concentrator OSPF router to other OSPF routers in its
domain. While the format is that of an IP address, it functions only as an identifier and not an address.
By convention, however, this identifier is the same as the IP address of the interface that is connected to
the OSPF router network.
Enter the router ID in the field, using dotted decimal IP address format (e.g.,
10.10.4.6). The default
entry is
0.0.0.0 (no router configured). If you enable the OSPF router, you must enter an ID.
Once you configure and apply a router ID, you must disable OSPF above before you can change it. You
cannot change the ID back to
0.0.0.0.
Autonomous System
An OSPF Autonomous System (AS), or domain, is a complete internal network. An AS boundary router
exchanges routing information with routers belonging to other Autonomous Systems, and advertises
external AS routing information throughout its AS.
Check the box to indicate that the VPN Concentrator OSPF router is the boundary router for an
Autonomous System. If you check this box, the VPN Concentrator also redistributes RIP and static
routes into the OSPF areas. By default, the box is not checked.
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