wfOspfBackupLsdbLSID 1.3.6.1.4.1.18.3.5.3.2.3.10.1.3

'The Link State ID is an LS Type Specific field containing either a Router ID or an IP Address; it identifies the piece of the routing domain that is being described by the advertisement.' REFERENCE 'OSPF Version 2, Section 12.1.4 Link State ID'