This attribute displays the number of segments sent at the time
command was issued. This is the segment sent count maintained by
accounting at the source Vc. Vc only counts packets that Vc thinks
can be delivered successfully into the subnet. In reality, these
packets may be dropped by trunking, for instance. This counter is
not updated when splitting fails, when Vc is in a path recovery state,
when packet forwarding fails to forward this packet and when
subsequent packets have to be discarded as we want to minimize the
chance of out-of-sequence and do not intentionally send out-of-
sequenced packets into the subnet.