This counter tallies frames that were marked yellow by the policer and then actually dropped rather than passed through with lower priority. This distinguishes yellow frames that were merely deprioritized from those that never made it, so an admin can tell if excess-rate traffic on a flow is truly being lost, not just relabeled. For example, if cmQosFlowPolicerStatsFMYD is nonzero while cmQosFlowPolicerStatsFMY is high, the admin knows a portion of a customer's bursting traffic was discarded outright, which could explain reported packet loss.