Model :

Hardware Version : Not Clear

Firmware Version :

ISP :

Hello,

I have a TP-Link TD-8840T and I have tried setting TD-8840T to bridge mode to let my router (Asus RT-56U) do the routing part and use TD-8840T as just as a modem.
But I can't seem to do it right, or I am missing something.

My connection is ADSL2+, Dynamic IP and IPoE, most settings on both devices are factory settings and both devices use the latest official firmware.
I set the bridge mode by going to 8840T's GUI -> quick setup -> next -> insert VPI (0) and VCI (100) -> select Bridge -> save
Now i get a page with "WAN Connection Releasing: Succes" and "WAN Connection Configuring: Succes" indicating it should be working properly, also the internet LED turns off from the device, as it should.
Now the TD-8840T should be in bridge mode and work as a modem only, right?
Windows says I have internet connection, my router (RT-56U) says I am connected to the internet, but I can't actually acces internet at all, no pages load at all. I can still acces both the TD-8840T and RT-56U.

TD-8840T is connected from phonejack to TD-8840T WAN, TD-8840T LAN1 to WAN in RT-56U and the power cable is on.
RT-56U is connected WAN to TD-8840T LAN1, RT56U LAN1 to PC1, RT56U to LAN2 and the power cable is on.

Using TD-8840T as both router and modem, with quick connect selecting Dynamic IP and same physical connections, the internet is accesable so neither device should be faulty.

Am I missing something? Have I forgot to do something? Should I do something more?

Please help,
Thank you :)