IPoE bridged to opnsense

[Scooter]

Hi Guys,

Appreciate any help or direction.
I'm from Australia and Just got my new NBN connection which is VDSL2 IPoE with ISP iiNet.
I have a thompson/telstra tg799vac which handles the vdsl fine.
When I bridge the modem I cannot get opnsense to connect.
I have set the WAN to DHCP, form what I've read that should connect and sync.
When I have the modem in router mode, it connects fine without any username or password so I don't think that is the issue.
Once I bridge the modem, the webgui for the modem shows the dsl is connected, I just cant get opnsesne to get through to the net.

Any ideas would be appreciated.