This read-only counter, in cells, tracks the number of valid CLP=1 cells in the egress direction of this channel discarded at the class-of-service queue due to overflow. An admin expects this counter to rise during outbound congestion, since CLP=1 cells are the ones intended to be sacrificed first to protect higher-priority egress traffic. For example, seeing this counter climb while cwacsEgrCLP0CoSDiscard remains zero is the expected, healthy pattern showing the priority scheme correctly protecting high-priority outbound traffic during congestion.