This Counter64 field tallies the frames on the forward direction of this bidirectional CES tunnel that were dropped on ingress, specifically traffic that the policer discarded outright on ingress because it exceeded even the excess-rate allowance. Because this row is a closed, already-completed measurement interval kept in the CES-PM history table — a fixed, immutable snapshot of one specific past window, any nonzero, growing count here is real traffic loss the attached service is experiencing in that direction, not just a policy flag, and tracking it separately per direction (forward vs. reverse) lets you tell whether a problem is one-sided rather than affecting the whole tunnel. For instance, over the most recently completed 15-minute bin this counter might climb by roughly 1,601 forward-direction frames — a step-change in that number right after a config change on this tunnel, with the reverse-direction counter unaffected, would tell you the change altered how much dropped traffic only that one direction is carrying.