My 2750 works fine on wifi but as soon as I bring up a wired connection to the router it drops the VDSL side and it will not reconnect until I remove the wired connection. I've tried new cables and also changing speed/duplex settings etc also different switchports on the Vigor all with the same result.

Has anyone else experiences this issue? On wifi alone it works fine no issues is only when I bring up a wired connection!