I have IPv6 running fine at many other sites, just not one Gigablast fiber home site works (yes, in Phoenix area). Hardware is a mix at the sites: Unifi, Fortinet, SonicWall. All, same issue.
I have spoken to support many times over the years, and they tell you it is not supported for home fiber. Most recently just over a month ago when I had one of my ONT's replaced, I decided to give it another go, same results.
It doesn't sound like you don't want to troubleshoot so I suggest again to contact Cox directly. You have gotten input from users but you don't seem to believe it. The best Cox will be able to do is confirm if IPv6 works on fiber in your area. They won't support your hardware. They will probably try to up-sell you to Cox Complete Care. Good luck. Feel free to report here what you find out so it can help others.
