This read-only counter tracks how many egress cells the port transmitted with the Cell Loss Priority bit set, marking them as lower priority and eligible for discard under congestion elsewhere in the network. An administrator monitors it to understand how much of the port's outbound traffic is being sent as best-effort versus guaranteed cells. A rising count relative to total egrXmtCells indicates a growing share of egress traffic is being tagged as discard-eligible, possibly due to policing upstream.