Exactly as described, this counts received frames on this benchmark port that exceeded the maximum permitted frame size for that port. This is the receive-side counterpart to the earlier oversize and giant counters but framed specifically against the port's configured maximum rather than a fixed protocol threshold, so it's the number to check when a jumbo-frame test appears to be dropping frames the reflector never even fully accepted. For example, a reflector entity whose own maximum permitted frame size wasn't raised to match a generator sending 9000-byte frames would show this counter climbing throughout the test even though the generator itself reports clean transmission.