How can I change the OUI24 top part of the MAC address of eth0, to one of my own, while leaving the bottom device specific 24 bits to be same. I can see clearly that it appears Jessie's default behavior combines Raspberry Pi Foundation's OUI of b8:27:eb with that of the CPUINFO's least 6 digits into the full HWaddr.
Serial : 0000000070813998 pi@raspberrypi:~ $ ifconfig eth0 eth0 Link encap:Ethernet HWaddr b8:27:eb:81:39:98
I do know /boot/cmdline.txt supports smsc95xx.macaddr=.... Unfortunately this is on the SdCard. I wish to preserve the uniqueness to follow the Pi Hardware and not the SdCard.
I do not see a 70-persistent-net.rules. So not sure if possible or how to write a complicated udev rule here. I also don't see evidence of write_net_rules or how that would work on the Pi.