This read-only Counter counts frames received on this port that had to be delivered to the system module (software) for processing rather than being switched directly in hardware between ports. A rising value here is a direct indicator of CPU offload from this specific port, useful for isolating which port is the source when the switch-wide ciscoTsStackSwitchRcvdFrames counter climbs unexpectedly. This is the per-port breakdown that lets an admin trace a switch-wide software-load spike back to one specific misbehaving port or attached device.