This is the high-capacity 64-bit counterpart of cefSwitchingDrop, counting the same CEF-attributable packet drops without wrapping as quickly on high-throughput interfaces. On a fully-loaded 10G-plus interface, cumulative CEF drops can exceed the 32-bit counter's range within a monitoring window, so tools tracking drop rate for capacity or SLA reporting should use this object instead. A carrier-grade edge router forwarding tens of gigabits per second might rack up billions of CEF drops over its uptime during transient route flaps, a total only representable in this 64-bit counter.