I booted with a freshly installed (by the Setup) USB-Stick and i did pick up my network settings. No other units (hard drives) were available at this time in volume manager.
CMOS, Online, ...
Where did it get the settings?
BTW, i had to activate again.
The config is stored on the USB and the system partition of the volume. You can also save and download this in MAINTENANCE -> miscellaneous -> Function: Save settings.