Network | Option to set Ethernet MAC address

[MichaIng]

Creating a feature request

Is your feature request related to a problem? Please describe:

• On most Armbian-based images, the onboard Ethernet MAC address is assigned randomly on every boot.
• On Odroid XU4 we set it fixed via boot.ini for all systems.
• Both ist not optimal.

Describe the solution you'd like:

• Best default is to assign a new random MAC persistently on first boot via u-boot/cmdline config file.
• Bonus would be to add a dietpi-config option to allow changing the MAC (per-interface) or unset it to intentionally have a new random MAC on every boot.

Describe alternatives you've considered:

• There is not really one! Having an identical fixed MAC per image leads to collisions when using multiple devices in the same network. Having a rotation MAC breaks persistent DHCP assignments via router.

Additional context

• Generic u-boot variable ethaddr (eth1addr/...): Images | Update all images to Buster where possible #2979 (comment)

[dzubybb]

@MichaIng
I got error on fw_printenv :

Bad CRC, using default environment
bootcmd=run distro_bootcmd
bootdelay=2
baudrate=115200
stdin=serial,cros-ec-keyb,usbkbd
stdout=serial,vidconsole
stderr=serial,vidconsole
ethaddr=00:00:11:22:33:44
eth1addr=00:00:11:22:33:45
eth3addr=00:00:11:22:33:46
eth5addr=00:00:11:22:33:47
ipaddr=1.2.3.4
....

I've added ethaddr 6a:32:0b:30:91:7c to /etc/armbianEnv.txt but it's not working.
I'm going back to hwaddress ether 6a:32:0b:30:91:7c in /etc/network/interfaces.

[MichaIng]

Thanks, that is sad but good to know you found another solution. Best would be to apply MAC on early boot (before systemd even starts), but /etc/network/interfaces as least should work in a generic way.

But just to be sure, the device name is eth0, right?