This Counter32 holds the upper 32 bits of the 64-bit count of cells discarded due to congestion at this queue during a particular 15-minute interval, paired with cwacIntCellDiscards or the combined cwacHCIntCellDiscards. It provides full-precision discard tracking for high-traffic queues where discard volume could otherwise exceed 32-bit range within one interval. An admin analyzing severe congestion events on a busy queue would check this high-order value to be sure the discard count hasn't wrapped and understated the actual loss.