This is a 64-bit cumulative count of packets that arrived at this interface's CAR policy faster than the configured rate and were therefore dropped or marked as exceeding traffic. A steadily climbing value here means real user or application traffic is being discarded by the CAR policer, not lost to a link problem, pointing an admin straight at a rate-limit configuration rather than a cabling or interface issue. For instance, if a branch office's CAR policy caps peer-to-peer traffic at 2 Mbps and a backup job briefly bursts to 10 Mbps, this counter could jump by tens of thousands of packets during that window.