This Counter64 field reports the frames received per second on the reverse direction of this bidirectional CES tunnel, as computed for this PM instance. Because this is today's still-open 24-hour PM window, which keeps growing through the day and resets only when the daily boundary rolls over, and this specific field is an instantaneous computed rate of accepted ingress traffic rather than a running total, so it reacts immediately to a burst instead of waiting for a bin to close, it is the field to check when you need to see the reverse-direction ingress throughput of the tunnel right now rather than a cumulative volume. For example, this counter might read 5,233 frames/sec during today's still-running 24-hour bin — if that number spikes on the reverse side while the opposite direction stays flat, it flags an asymmetric load or fault specific to that leg of the tunnel.