Comment 24 for bug 1639202

9c-eb-e8-3c-52-cc is the mac address of the USB C Network adapter. Apologies that I hadn't already made this clear on this thread.

I'd already looked into the mac address pass-through issue before opening this case. At the time, upgrading the BIOS from 1.2.10 to 1.2.14 didn't work. While running MAAS 2.0, BIOS version 1.2.10 worked fine.

There was a BIOS update (1.2.16) released by Dell on the 1st Dec. This seems to have fixed it! To be sure I tested with BIOS version 1.2.10 and 1.2.14 again, but got the same problem. So it looks like the fix is included with 1.2.16.

Now, when I boot up, I immediately see the mac address of the on-board device (not the usb-c)...which allows me to install Ubuntu 16.04.1 from MAAS 2.1 to the Dell Precision 5510.