This read-only Counter64 reports the receive frame rate for this PM instance, sampled per second. A high frames-per-second reading paired with a low bytes-per-second reading points to a flood of small frames — common in a control-plane storm or a DoS-style event — which the byte-rate counter alone would mask; because it is drawn from this table's currently-accumulating, short-interval bin, it reflects only the last few minutes of activity, so it's the value to watch for a fast-forming problem rather than a long-term trend. On a 1 Gbps UNI feeding a business Ethernet Private Line, a live reading of 205,791 frames/sec spiking well above baseline is what would prompt an admin to check for a broadcast or small-packet flood in real time.