This read-only PerfCounter64 counts Drop Events detected on this link aggregation group during the interval, where a drop event represents an interval in which one or more packets were dropped due to lack of resources. It tells an administrator the bonded link experienced resource exhaustion, which is a broader signal than any single frame-level error counter. For example, correlating cmLagStatsESDE with a period of high overall utilization would suggest the LAG is being pushed past its buffering capacity rather than suffering a link-layer fault.