@Sebastian-Roth Dell has got a ServiceTag (serialnr) for each system that is unique. Is it possible to use that as an identifier?

@george1421 No, as we are using Dell as a prefferd supplier we only have Dell hardware

I could bring in my personal HP laptop if it can be any help for you?

In our company we have several new Dell XPS-13 laptops witch do not come with an internal ethernet card.
Therefore we have several USB to Ethernet dongles witch work fine with PXE boot.

The only issue is that the MAC address that is used to identify systems is collected from the dongle. If the dongles get lost, swapped or as the IT staff uses their own dongle, the system is not seen correctly. Is there a way to work around this? The option To use the Pass-trough MAC-address does not work with the dongles we have right now. Is there no other way in the FOG server than to recognize the system other than by the used MAC address?