I checked different android firmware, official HK1, Vontar x4, x96 x4, and custom Android TV, slimBox. All of them have working stable 1Gb link on Android, but no one have “mac” in the enviroment. Some do not have a MAC address at all in the environment, some have MAC in “ethaddr”.
@emveepee, autostart.sh is working for me too, stable 1Gb link, tnx