This is the average of the periodic packet-delta samples UCS Manager took across the current reporting interval for this object. It matters on the live receive-side counter set UCS Manager keeps for one Ethernet endpoint (a blade's vNIC adapter port, an I/O Module uplink, or a fabric-interconnect server port) inside a UCS domain because it is the steadier figure to trend over time, since a single delta sample can be skewed by one short burst. A totalPacketsDeltaAvg holding around 8,000 packets per sample on this interface week over week is the baseline an admin would use to notice a gradual, rather than sudden, increase in load.