Changing ethernet adapter mac?

I tried sudo ip link set “vm name” address “mac addy”
But it just tells me it cant find the device/vm.
Changing wifi mac to random is completely different than what i want. I want every new virtual vm to display a unique mac. Does it read my hardware adapter mac or is it different? So far a couple of vm’s show the same mac but others are random when i check ipconfig/all inn.