BT Home Hub BT Home Hub 3: Xbox not connecting to modem

I am having the exact same issue, did you ever resolve this?

I'm in the UK and my router is a BT Home Hub 4 while my modem is a BT openreach.

What Country/State/Province do you live in? ::England/South Yorkshire/Doncaster::

Modem brand & model number: ::BT Home Hub 5/ BT Home Hub 3::

Router brand & model number: ::BT Home Hub 5/ BT Home Hub 3::

How many consoles do you have connected to this router? ::1::

Wired or wireless (for each console): ::Wireless, tried both routers::

If Wireless, are you using a white or black external adapter, or an internal (Xbox 360S) adapter? ::White Ex adaptor::.

Things you have tried: ::I have tried connecting using 2 routers, Home Hub 5 has fibre broadband connected, Home Hub 3 has copper broadband connected and is in the same room as my Xbox::

Is UPnP Enabled? Yes/no/Unknown :: Unknown ::

Do you have a NAT error? If so, what is your NAT type? ::Unknown::

Any Error Codes you encounter: ::You have been disconnected from XBox Live::

Who is your ISP(Internet Service Provider)? ::BT::

Hope this is helpful. I don't have the error code at the moment but will update once I'm playing the game. Thanks for your assistance

I'm currently using a BT home hub 3

Check if your Internet Provider and router support IPv6.

In case your internet provider can't give you IPv6 support, you might try to get a 6in4 tunnel through a tunnel broker (Wikipedia List of IPv6 Tunnel Brokers
here)

Be aware however, that your router HAS TO support IPv6, and has to have the ability to establish a connection to a IPv6 Tunnel broker!