This object records the next send sequence number that this router expects to see from the remote peer on this VPDN session, i.e., its view of the far end's outgoing sequence counter. It helps an administrator detect sequencing mismatches between the two tunnel endpoints, which typically show up as dropped or reordered payload before a session finally drops. For example, if the locally tracked remote send sequence diverges sharply from the sequence numbers actually arriving in packets, that gap indicates the two ends have lost synchronization on this L2TP/L2F session.