Aha! figured I would just play around, and Changed Prefix Delegation from the default of disable to enable and that worked I now have full ipv6 Instructions didn't help ,this should be made known

Here is a screenshot of ipv6 section, with google dns selected it was the same with the Isp selected dns. I dont have a clue why its not working. My old router worked fine and not 6to4 tunnel as you...

I just installed a AC2600 and have the same issue. I have updated to latest firmware reset cable modem and rebooted router numerous times. Ipv6 address shows in router status but fails online test....