# Area Configuration

Device > Configure > Open Shortest Path First (OSPF) > Open Shortest Path First (OSPF) > Area Configuration

This dialog box provides the area configuration information for OSPF on this device.

To view the definition for a particular MIB variable, click the appropriate link from the following list:

- Area ID (ospfAreaId)

- Authentication Type (ospfAuthType)

- Import AS-external-LSA Support (ospfImportASExtern)

- Area LSA Checksum Sum (ospfAreaLSACksumSum)

The following list specifies buttons in this dialog box, as well as their function:

- Click OK to continue.

- Click Monitor to launch the Area Specific Info. Monitoring dialog box.

- Click Cancel to close the dialog box.

- Click Refresh to update the contents of the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access online help.

Area ID (ospfAreaId)

32-bit integer that uniquely identifies an area. The area ID for the OSPF backbone is "0.0.0.0".

Authentication Type (ospfAuthType)

Authentication type specified for an area. Additional authentication types may be assigned locally on a per area basis.

Import AS-external-LSA Support (ospfImportASExtern)

Area's support for importing AS external link-state advertisements.

Area LSA Checksum Sum (ospfAreaLSACksumSum)

32-bit unsigned sum of the link-state advertisements' LS checksums contained in this area's link-state database. This sum excludes external (LS type 5) link-state advertisements. The sum can be used to determine if there has been a change in a router's link state database, and to compare the link-state database of two routers.