This read-only counter tracks the total number of low-priority ATM cells that the system has discarded using Selective Cell Discard (SCD) to manage congestion. Network engineers monitor this to assess how often the board is dropping low-priority traffic—high counts indicate sustained overload or poor traffic classification, signaling a need to upgrade capacity or adjust QoS settings. If this counter shows 500,000 cells dropped over a week, it reveals that low-priority traffic (like best-effort data) is regularly being sacrificed to protect video/voice during peak periods.