We've recently changed to VDSL and have had to get a new modem. We originally got a modem which had problems with the wireless signal cutting out and having reduced speed. We have since replaced that modem with the Dlink 2877AL. We are unable to connect to the internet using this modem. The green light for DSL is on but there is a red light showing under Internet. During the setup wizard we put the following settings in:

Internet connection type :VDSL
Country: New Zealand
Internet service provider: Others
802.1q: Activated
VlanID:10
Protocol:PPPoE
MTU: 1492
Username:Bigpipe
Password:Bigpipe

These were the only options given to us, we were unable to set the VCI and VPI during this process as they never came up. There are heaps of options that are able to be changed in the advanced settings but I don't know what they should be set to or what they do.

After putting in the above settings the modem 'internet' light turned red, indicating a failed internet connection according to the manual.
After ringing the dlink helpline they have said that the problem is connected to the settings that we have inputted that were provided by our isp.

We were able to play around with some settings which allowed us to get internet despite the red light still showing. The setting that allowed it to work was the IPV6RD setting '6RD Tunnel: Enabled', where it was previously disabled. This seems to make it work but it doesn't seem to be an ideal fix.

Has anyone else had issues with this modem or are able to provide some insight or advice that could help our situation?
Thanks in advanced :)