@JasonNaughton This is a strange one. The linux kernel just doesn’t just invent mac addresses. It would be interesting to look up the first 6 characters of the mac address to see if you could identify the manufacturer.
So are you saying there are 4 physical nics in this computer. LOM, PCie 1, PCie 2? Does that mac address belong to the LOM?
I can say that we are dealing with 2 kernels here. The iPXE boot loader, and FOS Linux. Its technically possible to get to the fog ipxe menu and then when you start up FOS it doesn’t get an IP address because either the nic order has changed or there is missing firmware that is needed to init certain nics.