OSPF NSR WITH DELAYED NEIGHBOR SYNCHRONIZATION

摘要

A network element attempts to bring up an adjacency with a neighbor using a neighbor state machine (NSM) of an active OSPF instance, including: maintaining a neighbor data structure only in the active instance prior to the NSM transitioning to a Full state, delaying synchronization from the active instance to a standby OSPF instance of the neighbor data structure, maintaining tracking information of the NSM in only the active instance; installing LSAs received from the neighbor in both the LSDB of the active and standby instances, and, if and when the NSM of the active instance transitions to the Full state and all LSAs requested from the neighbor during database exchange are ensured to synchronize to the standby instance's LSDB, synchronizing from the active instance to the standby instance data item(s) of the neighbor data structure.