This counter records messages received from the physical layer whose included IP header indicates a message size smaller than the message's actual size. An administrator treats a rising count as evidence of an inbound size-field inconsistency originating from the physical layer or a peer, as opposed to the outbound ULP-side mismatches tracked by cntllc1OutMismIpSizes. For example, seeing this counter rise for traffic from one specific peer device would suggest that peer's IP stack is miscalculating header size fields on its outbound frames.