ipv6 dns servers and settings
I've used xfinity for 6 years and always had ipv6 connectivity. About 5 months ago I got a new router and used the same settings for ipv6 that my last router used. But I'm not getting ipv6 - all my wifi devices are running at 433mbps. In the past when ipv6 was working wifi devices all ran at 867mbps.
I was using a netgear R6400 router when ipv6 was working. I upgraded to Netgear R6700v3 to get more bandwith because I've added 2 Fire TV sticks.