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Receiving Link State Acknowledgments Acked LSA List: Keeps track of any LSAs the adjacent neighbor has acknowledged, but which the router itself has not yet received. Necessary because, unlike RFC 2328, each router acknowledges an LSA only the first time it is received as a multicast. Additional Processing Steps to RFC 2328 Reception of an LS ACK newer than the database copy: The LS ACK is added to the Acked LSA List for the sending neighbor. BackupWait Neighbor List: Backup MDR receives an LSAck for an LSA on the BackupWait List, the sending neighbor is removed from the list of neighbors that have not yet been covered. |