"The number of packets, delivered by this sub-layer to a\nhigher (sub-)layer, that were not addressed to a\nmulticast or broadcast address at this sub-layer.\n\nDiscontinuities in the value of this counter can occur\nat re-initialization of the management system, and at\nother times as indicated by the value of\n'last-clear'." . . . "Reference : RFC 2863: The Interfaces Group MIB - ifHCInUcastPkts" . .