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MAC change every reboot on NanoPi Neo (1.4)

bfgmatik
in Allwinner sunxi

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I'm running a fresh installation of Armbian 20.11 Focal with Linux 5.8.16-sunxi on NanoPi Neo board with Allwinner H3.

  

root@nanopineo:~# uname -a
Linux nanopineo 5.8.16-sunxi #20.08.14 SMP Tue Oct 20 22:15:32 CEST 2020 armv7l armv7l armv7l GNU/Linux

 

The problem is that MAC address changes on every boot. This is very problematic for systems where an IP is assigned by DHCP based on MAC address table.

I have two important questions:

1) Why MAC address is not generated based on processor unique ID? This seems to be the most sensible solution.

2) What part of code/startup script is assigning the random MAC address? Unfortunatelly I was not able to find startup script (or firstrun script) which does the thing. Is the random mac address assigned by device driver or the kernel? Changes in /boot/armbianEnv.txt or /etc/network/interfaces didn't give me a static MAC address (it is still random after every boot).

Solved by Werner

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