Comment 21 for bug 1639202

Do you know where the 9c-eb-e8-3c-52-cc originates from? There is nothing we can do so long as the request to maas originates from the 9c-eb-e8-3c-52-cc mac address. If the firmware is somehow masking the actual mac address with the above then that needs to be fixed in the firmware, or via a firmware setting.

Please attempt to figure out where the 9c-eb-e8-3c-52-cc is.
If it helps a mac search on 9c-eb-e8 yeilds: BizLink (Kunshan) Co. Ltd.
A mac search of 84-7b-eb yeilds Dell Inc.

I suspect they are really the same device. I have a feeling the usb-c adapter or docking station you are using is really just Bizlink device that Dell has rebranded.

This really looks like a firmware bug, where the firmware uses the non-rebranded mac of the device for pxe while in efi, and the rebranded mac address in the OS after boot.

Have you tried updating the firmware on your machine, and possibly also the firmware of the usb-c device?

Thanks,
Dave Chiluk