This read-only PerfCounter64 counts frames that were marked yellow by this policer and then subsequently dropped, meaning excess-rate traffic that congestion downstream actually discarded rather than merely tagging. It tells an administrator how much of a customer's above-commitment bursting is actually being lost, as opposed to just flagged for lower priority. For example, if cmQosPolicerV2StatsFMYD rises sharply while cmQosPolicerV2StatsFMY stays flat, that points to a downstream congestion point discarding more of the already-marked yellow traffic.