This read-only counter tallies the number of cells that had their CLP bit set locally by this switch's own UPC policing function, distinguishing cells tagged here (because they exceeded a tighter traffic contract but were still within a looser one) from cells that already arrived pre-marked (tracked by chanIngrClpSetRcvCells). Admins use this to see how much excess traffic UPC is actively re-marking as low priority rather than discarding outright, which happens when ingrUpcCLPTagEnable is enabled. For example, a rising chanIngrUpcClpSetCells count confirms the connection is regularly sending traffic above its stricter (e.g., SCR) rate but within its looser (e.g., PCR) rate, and UPC is tagging that excess rather than dropping it.