This read-only counter, in frames, tallies frames received with the Discard Eligibility bit set, meaning the sender marked them as expendable because it exceeded its own committed rate when sending. A high count means the remote end is regularly bursting above its own committed rate, and those frames are the ones most likely to be silently dropped, feeding into casfVcCountInDiscards, if this switch experiences any congestion. A remote site persistently bursting above its contracted CIR would show a steady stream of DE-marked frames arriving here.