after shutting down (init 0) an APU2 all LEDs of RJ45 PCB JModular jack show 'link-down' status (port LEDs are all off). A Gbit switch port connected also shows 'link-down' state. No wonder that sending a Wake-on-LAN UDP discard packet (magic packet) to the APU2 is ignored then.
doing the same with APU1 works without problems though. In particular the associated LAN switch port still shows 'link-up' even after APU1 shutdown. A Wake-on-LAN packet works as expected (i.e. wakes up the board).
is it intended behavior that APU2 no longer supports WakeupOnLan?
is it a hardware problem specific to APU2B4 (beta status) ?
I now contacted pcengines directly. The solution is:
WoL works but only on the NIC next to the USB port
thank you for your rapid support!