Hello.
There is major error on https://wiki.mikrotik.com/wiki/Random_MAC/Ethernet_address_generate_and_apply page.
Random MAC address MUST have second-lowermost bit SET in first octet!
Please, change it to some of 2,6,A,E.
I have deleted that page. It was not part of the official documentation and was made by a user, when we still allowed users to make articles.
Not that it matters in this context (after @Normis removed the misleading article), but anyways:
Actually it can be one of 2,3,6,7,A,B,E,F … all those have the second LSB set (and the first LSB doesn’t matter).
I believe that the LSB value 1 indicates a multicast address regardless the value of the UAA/LAA indicator, and no interface’s own MAC address should be a muticast one. So I’d stick with 2,6,a,e as the lower nibble of the first byte.
Exactly!