This Counter64 counts octets that were already DE-marked and were discarded at ingress for exceeding the traffic contract, the byte-level counterpart to circuitInDEFramesDiscard. This isolates how many bytes of already-flagged, lower-priority traffic were actually lost, as opposed to bytes from otherwise-compliant traffic being discarded (which would show up only in circuitInOctetsDiscard, not here). For example, if nearly all discarded octets on this circuit show up in this DE-specific counter rather than the general discard counter, it confirms the traffic-shaping policy is correctly sacrificing pre-flagged excess traffic rather than compliant traffic.