This read-only Counter tallies the number of frames discarded on ingress because the ingress queue depth was exceeded, directly reflecting drops caused by the egressQDepth/ingress queue mechanism rather than other error conditions. An administrator watches this counter to confirm that ingress buffer overflow, specifically, is the cause of frame loss on a channel, distinct from CRC errors or DE-threshold discards. For example, a channel with a rising rcvFramesDiscXceedQDepth count but a low rcvFramesDiscXceedDEThresh count would indicate the connection is overwhelming its buffer outright rather than merely exceeding its DE-marking threshold.