I understand that Cox now supports Ipv6 and my Asus RT-N66 supports that...

 ...but I need several ISP settings from Cox and the agent in tech support was completely clueless. All the Ipv6 postings here seem to be 3 to 5 years old.

The agent in tech support chat was completely clueless, saying it's all automatic (?). He even linked me the Asus router page that says to "get these settings from your ISP." lol. Yeah, thanks a lot. That's why I'm here with you on chat.

I'm surprised Cox doesn't have a web page with the needed settings. Asus says to ask ISP for:

Ipv6 Prefix

Prefix length 

Gateway

LAN settings

DNS settings

DNS Server