This field records how much the counter for oversized Ethernet frames received on this interface that exceed the maximum allowed frame length changed during the specific collection interval this historical record captured — a frozen snapshot of that one interval's increase, not a live running total. For a network admin, on this port, a rising giants count usually means a neighboring device has jumbo frames or an MTU misconfigured larger than this interface expects. For example, 6 oversized frames in the last interval on this specific FCoE path would already be worth a closer look, since this counter should normally sit at or near zero.