Cisco VPN 3000 User's Guide download pdf (Page 159)

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Configuration | System | IP Routing | OSPF Areas | Add or Modify

8-9

VPN 3000 Concentrator Series User Guide

Reminder: The Manager immediately includes your changes in the active configuration. To save the active

configuration and make it the boot configuration, click the

Save Needed icon at the top of the Manager

window.

Configuration | System | IP Routing | OSPF Areas | Add or Modify

These Manager screens let you:

Add: Configure and add an OSPF area.

Modify: Modify parameters for a configured OSPF area.

Note: Once you have configured an OSPF Area, you cannot modify its ID. To change an area ID, delete the

existing area and add a new one.

Figure 8-7: Configuration | System | IP Routing | OSPF Areas | Add or Modify screen

Area ID

Add: Enter the area ID in the field using IP address dotted decimal notation; e.g., 10.10.0.0. The

default entry is

0.0.0.0, the backbone.

Modify: Once you have configured an area ID, you cannot change it. See note above.

The

Area ID identifies the subnet area within the OSPF Autonomous System or domain. While its format

is the same as an IP address, it functions only as an identifier and not an address. The

0.0.0.0 area ID

identifies a special area—the backbone—that contains all area border routers.

Area Summary

Check the box to have the OSPF router generate and propagate summary LSAs (Link-State

Advertisements) into OSPF stub areas. LSAs describe the state of the router’s interfaces and routing

paths. Stub areas contain only final-destination hosts and do not pass traffic through to other areas.

Sending LSAs to them is usually not necessary. By default this box is not checked.

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