simonebortolin nel caso specifico parlavo proprio di Unidata.
Ho trovato la fonte di cui vi riporto un estratto:
I managed to get it working as follows:
make sure the the FB has it's own DHCP range that does not conflict with the USG networks
leave the ISP's PPPoE credentials / connection active on the FB
enable PPPoE passtrough on the FB
Fill in the same PPPoE credentials on the USG (without selecting a VLAN for it)
remove the credentials from the FB (make them invalid, i just replaced the @ sign)
connection drops on both the FB & USG
after a minute or so the USG is able to connect
.. et voilla, I know have 1PPPoE sessions with my ISP comming from the USG
