AllDRouters 广播网络上，DR 和 BDR 必须准备接收发送到该地址的包.

AllSPFRouters 广播网络上，所有运行 OSPF 的路由器必须准备接收发送到该地址的包.

IfEvBackupSeen The router has detected the existence or non-existence of a Backup Designated Router for the network.

IfEvInterfaceDown Lower-level protocols indicate that this interface is no longer functional.

IfEvInterfaceUp Lower-level protocols have indicated that the network interface is operational.

IfEvLoopInd An indication has been received that the interface is now looped back to itself.

IfEvNeighborChange There has been a change in the set of bidirectional neighbors associated with the interface.

IfEvUnLoopInd An indication has been received that the interface is no longer looped back.

IfEvWaitTimer The Wait Timer has fired, indicating the end of the waiting period that is required before electing a (Backup) Designated Router.

InterfaceBackup In this state, the router itself is the Backup Designated Router on the attached network.

InterfaceDown This is the initial interface state.

InterfaceDR In this state, this router itself is the Designated Router on the attached network.

InterfaceDROther The interface is to a broadcast or NBMA network on which another router has been selected to be the Designated Router.

InterfaceLoopBack In this state, the router's interface to the network is looped back.

InterfacePointToPoint In this state, the interface is operational, and connects either to a physical point-to-point network or to a virtual link.

InterfaceWaiting In this state, the router is trying to determine the identity of the (Backup) Designated Router for the network.

0xc0.

IPProtocolNum OSPF申请的IP协议号.

NbEv1Way An Hello packet has been received from the neighbor, in which the router is not mentioned.

NbEv2WayReceived Bidirectional communication has been realized between the two neighboring routers.

NbEvBadLSReq A Link State Request has been received for an LSA not contained in the database.

NbEvExchangeDone Both routers have successfully transmitted a full sequence of Database Description packets.

NbEvHelloReceived An Hello packet has been received from the neighbor.

NbEvInactivityTimer The inactivity Timer has fired.

NbEvIsAdjOK A decision must be made as to whether an adjacency should be established/maintained with the neighbor.

NbEvKillNbr This is an indication that all communication with the neighbor is now impossible, forcing the neighbor to revert to Down state.

NbEvLLDown This is an indication from the lower level protocols that the neighbor is now unreachable.

NbEvLoadingDone Link State Updates have been received for all out-of-date portions of the database.

NbEvNegotiationDone The Master/Slave relationship has been negotiated, and DD sequence numbers have been exchanged.

NbEvSeqNumberMismatch A Database Description packet has been received that either a) has an unexpected DD sequence number, b) unexpectedly has the Init bit set or c) has an Options field differing from the last Options field received in a Database Description packet.

NbEvStart this is an indication that Hello Packets should now be sent to the neighbor at intervals of HelloInterval seconds.

Neighbor2Way In this state, communication between the two routers is bidirectional.

NeighborAttempt This state is only valid for neighbors attached to NBMA networks.

NeighborDown This is the initial state of a neighbor conversation.

NeighborExchange In this state the router is describing its entire link state database by sending Database Description packets to the neighbor.

NeighborExStart This is the first step in creating an adjacency between the two neighboring routers.

NeighborFull In this state, the neighboring routers are fully adjacent.

NeighborInit In this state, an Hello packet has recently been seen from the neighbor.

NeighborLoading In this state, Link State Request packets are sent to the neighbor asking for the more recent LSAs that have been discovered (but not yet received) in the Exchange state.

TSS for thread-safe struct.