# Link State Database

Device > Configure > Open Shortest Path First (OSPF) > Open Shortest Path First (OSPF) > Link State Database

This dialog box provides the link state database information for OSPF on this device.

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

- LSA Rx - Area ID (ospfLsdbAreaId)

- LSA Type (ospfLsdbType)

- Link State ID (ospfLsdbLSID)

- Originating Router ID (ospfLsdbRouterId)

- LSA Sequence No. (ospfLsdbSequence)

- LSA Age (ospfLsdbAge)

- LSA Checksum (ospfLsdbChecksum)

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

- Click OK to continue.

- Click Apply to save the changes in the 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.

LSA Rx - Area ID (ospfLsdbAreaId)

32-bit identifier of the area from which the LSA was received.

LSA Type (ospfLsdbType)

Indicates the link state advertisement type. Each link state type has a separate advertisement format.

Link State ID (ospfLsdbLSID)

LS type-specific field containing either a router ID or IP address; identifies the piece of the routing domain that is being described by the advertisement.

Originating Router ID (ospfLsdbRouterId)

32-bit number that uniquely identifies the originating router in the autonomous system.

LSA Sequence No. (ospfLsdbSequence)

Signed 32-bit integer used to detect old and duplicate link state advertisements. The space of sequence numbers is linearly ordered - the larger the sequence number, the more recent the advertisement.

LSA Age (ospfLsdbAge)

Age of the link state advertisement, in seconds.

LSA Checksum (ospfLsdbChecksum)

Checksum of the complete contents of the advertisement, except the age field. The age field is not included so that an advertisement's age can be incremented without updating the checksum.