USG does'nt connect with PPPoE to the ISP

Please first make sure, that the router/modem in front of the USGs WAN interface is definitely in bridge mode!

Depending on the provider and model you can already tag a VLAN on the bridge.

Make sure, that you verify with your provider that the following details are correct:

- Authentication Type

- your user name and password

- if compression is needed

- if a VLAN tag is needed

The PPPoE interface can then be assigned to your physical interface like this:

Setting up a VLAN on a WAN PPPoE-Interface

If the PPPoE still won´t establish a connection, then you can run a packet capture, which you can send to your provider or us for a more in-depth checking.
You can follow this guide for the packet capture (just keep in mind to select the correct interface):

USG Series - Packet Capture