You need to set it up as a PPPoE with the username needed as email@example.com only use a pass word if the router asks for one. If it does BT works fine.
I've got the exact same problem. I've setup the connection type as PPPoE with the user name as firstname.lastname@example.org. The Belkin AC1200 forces me to submit a password, so I enter a dummy password, which lets me apply the settings. Then nothing happens.
I've rebooted the modem, the router several times in different orders. Changed the Ethernet cable and still no internet connection. I've reverted back to the BTHomeHub and that is working OK.
Make sure you are connecting the router into Lan 1 port on the Openreach modem.
Yes - definitely am connecting to LAN Port 1 and the port marked modem on the router. I'm reconnecting the modem back to my HomeHub 3 router regularly to get the internet connection so the broadband connection is fine also.
Sorry, I don't know why it won't connect. Here is the user manual, just work your way through it to make sure you are connecting with the correct ports etc.
Just spoke to Belkin support. They took through me all the basic steps - which I've been through many times already - powering everything off, resetting everything, inserting in the cables, trying both PPPoA and PPPoE connection types, etc. but nothing. The router does recognise there is a cable plugged in to the modem, as it changes to a solid amber light from a flashing one when the cable is plugged-in, but it won't give an internet connection.
Belkin support insist the connection is not being made because I need to supply a password along with the user id of email@example.com as per my HomeHub router. The problem is everywhere I've read on the forums says that there is no need for a password, BT customer help even says that if the router insists on it then use 'password' and I've also seen and tried 'BT' as a password but to no avail. Belkin insist it needs a password and say to call BT to ask for a password. I know I'll call BT - wait for 30 minutes - and they'll say I don't need a password. So I'm well and truly stuck.
@ edgrundy & Skewers - Have you first of all tried a factory reset of the router, by holding in the reset button on the back, as detailed in the manual?
Also, other things I would recommend would be restore the router to factory defaults and checking belkin's website to see whether or not there is a more recent firmware version available for the unit.