There is ifconfig and I may be able to use this for prrof of concept but otherwise I guess I have to dig into the config files to make it permanent.
Anyone here who knows how to?
While you wait for others to provide better solutions…
Perhaps you can simply add the needed commands to your ~/config/settings/boot/UserBootscript file?
I have figured out a workaround now by setting the IP addresses manually and although the wifi adapter drops the connection every few minutes, it’s good enough for now. Still the original problem on the wifi adapter persists, and the firmware driver needs to be fixed.