This documents and scripts the old Vonets VAP11G hardware revision (e.g.
HW Ver 5.0.0, Marvell-based, MAC OUI 00:17:13): the ~2011-2012 model with
no reset button, no web UI, and no IP stack on its ethernet port.
If you plug one in and see nothing — no ARP, no DHCP, ping fails, no
192.168.254.254 web page — the device is not broken. That is normal behavior
for this generation, and it drives people mad. The newer generation
(VAP11G-300 etc.) works completely differently (web UI at