380 CHAPTER 15: OPEN SHORTEST PATH F IRST (OSPF)ip ospf linkStateDataLayer 2SwitchingModules3 MultilayerSwitchingModulesrouterDisplays router link state advertisements (LSAs) in the link state database.Valid Minimum Abbreviationip o l rImportant Considerationn To view link state database information, OSPF must be enabled.OptionsFields in the IP OSPF Link State Data Router DisplayPrompt Description Possible Values [Default]Area ID Area ID (in the formn.n.n.n where 0 <= n <= 255)that corresponds to the OSPFarea for which you want toview router link stateadvertisement informationValid area ID 0.0.0.0 (factorydefault), orcurrent valueArea mask Subnet mask of OSPF area forwhich you want to view routerlink state advertisementinformationValid area mask 0.0.0.0 (factorydefault), orcurrent valueLSID Link State ID: router ID of theoriginating router (in the formof an IP address)Router ID 0.0.0.0 (factorydefault), orcurrent valueLSID mask Link State ID bit mask(Example: 255.0.0.0)Link State ID bitmask0.0.0.0 (factorydefault), orcurrent valueField DescriptionFlags n V — Router is the endpoint of an active virtual link thatis using the area as a transmit area.n ASBR — Router is an autonomous system boundaryrouter.n ABR — Router is an area border router.Link Data n PTP — MIB II index value for an unnumberedpoint-to-point interface.n Transit Net — IP address of the router’s interfacen Stub Net — Network IP address maskn Virtual link — IP interface address of neighboringrouter
