yes, I am only interested in IB as I can't do native Ethernet since the switch is not managed.
I can confirm that the MCX354A is running FW ver 2.36.5000 and I am using WinOF v5.1. (although I was actually previously using v4.8)
Switch is a SX6015 running latest FW 9.3.8000.
I have checked the port stats with adapter port 1 plugged into switch with perfquery and there is traffic on the ports and NO errors at all, but ibstat lists the speed is listed at 40 (FDR10)
I switched the cable back into 'loopback' (plugging the switch end of the cable into port 2) and perfquery shows no errors there either. The ibstat command indicates a 56 link rate.