This attribute displays the number of segments received at the time
command was issued. This is the segment received count
maintained by accounting at each end of the Vc. This counter is
updated only when the packet cannot be successfully delivered out
of the sink Vc and to the sink AP Conditions in which packets may
be discarded by the sink Vc include: missing packets due to subnet
discards, segmentation protocol violations due to subnet discard,
duplicated and out-of-ranged packets and packets that arrive while
Vc is in path recovery state.