I was first thinking that the output of stat64_aveTxFrameSize & stat64_aveRxFrameSize coutners in portStats64Show is in Bytes.
But now I'm not so sure. Is it in Words maybe?
The manuall only states: "Average Tx Frame size, based on the word and frame counts during the last fiveseconds." without specifying the units.
The output is in bytes, meaning Tx/Rx Average frame size is in bytes.