This read-only counter, in cells, tracks the number of valid ATM cells with CLP set to 1, the lower, discard-eligible priority marking, received in the ingress direction of this channel before reaching the traffic management entity. An admin compares this to the CLP=0 ingress count to understand the mix of high- versus low-priority cells entering on this channel, which helps interpret subsequent discard statistics. For example, a channel showing a high proportion of CLP=1 cells relative to CLP=0 suggests the upstream device is aggressively tagging excess traffic as discard-eligible, which the admin would expect to correlate with higher discard counts under congestion.