This read-only Counter32 tracks the number of frames discarded in the ingress direction on this Frame Relay port. Because it counts discards specifically on the receive side, a climbing value tells an admin that incoming traffic is being dropped at this port rather than passed through, which could stem from congestion, policing, or errors on inbound frames. For example, if this counter rises sharply after a traffic spike from a branch site, the admin would check whether the port's ingress buffers or discard eligibility thresholds are being exceeded.