This read-only Counter64 reports the transmit frame rate for this PM instance, sampled per second. It is the egress counterpart used to catch an outbound small-frame burst — for example a replicated multicast or broadcast storm — while it is still happening; 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 10 Gbps aggregation trunk carrying multiple EVCs, a live reading of 826,281 frames/sec spiking well above baseline is what would prompt an admin to check for a broadcast or small-packet flood in real time.