Comment by kazinator

I made a Mobitex radio modem driver for Linux in 1998. I made it look like Ethernet, faking out the full 14 byte ethernet header in the sk_buff. Without that, a whole bunch of things don't work. Starting with ARP; if you look like Ethernet, you get ARP. Then you have things like MAC filtering (ebtables, now nftables), bridging, Tools like tcpdump like familiar headers, otherwise they need patching.

Mobitex has three-byte addresses, like the vendor space of Ethernet, so I just picked some OUI (or was it just three null bytes?)