I am also using the systemd-tool initramfs hook for remote root cryptsetup unlock, but I think it was randomized even with the default setup as described in the wiki. Sep 14 22:08:05 alarm systemd-udevd: Could not generate persistent MAC address for eth0: No such file or directory Sep 14 22:08:05 alarm systemd-udevd: Could not set offload features of eth0: Device or resource busy Sep 14 22:08:05 alarm systemd-udevd: link_config: could not get ethtool features for eth0 To view the device hostnames connected to your network, run sudo nbtscan 192.168.0.1-192.168.0.255, assuming the host is at 192.168.0.1 and uses a subnet mask of 255.255.255.0. Run sudo apt-get install nbtscan to install. Sep 14 22:08:05 alarm systemd-udevd: link_config: autonegotiation is unset or enabled, the speed and duplex are not writable. On Linux, you can use nbtscan to achieve what you seek.

Interestingly, the actual mac address seems to be even different to the one in the log. The random MAC address is assigned even before boot.scr is read. I am booting from eMMC if that makes a difference. Warning: (eth0) using random MAC address - 1e:5a:5a:69:a5:28 Unfortunately, modifying the boot.txt like in the wiki does not help.

I would like to define a static mac address for my rock64.

Arch linux get mac address