This Counter64 field reports the frames received per second on the forward direction of this bidirectional CES tunnel, as computed for this PM instance. Because this is the currently open, still-accumulating measurement interval that keeps climbing until its boundary is reached and it rolls off into the history table, 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 forward-direction ingress throughput of the tunnel right now rather than a cumulative volume. For example, this counter might read 3,753 frames/sec during the in-progress 15-minute bin — if that number spikes on the forward side while the opposite direction stays flat, it flags an asymmetric load or fault specific to that leg of the tunnel.