This read-only Counter tallies the number of frames discarded on ingress due to a CRC error. An administrator monitors this to detect frame corruption occurring on the receive path, which points toward a signal-integrity or hardware issue on that channel or port rather than congestion. For example, a steadily rising rcvFramesDiscCRCError count on one channel, while sibling channels remain at zero, would point to a problem specific to that connection's ingress path rather than a shared upstream cause.