How to set up ipv6 on my xbox

you don't, you're assigned an IP address by your Internet provider which may or may not be in the IP six range depend depending on whether they support it or they assigned that to you

IPv6 will not improve your NAT issues as those are all local on your router. You need to open your ports.

https://support.microsoft.com/en-us/topic/open-these-network-ports-for-xbox-one-94d5f68a-387c-1982-7163-6e12a4d9e981

Do you know if you ISP supports IPv6? Your router could be tunneling your IPv4 connection to an IPv6 which basically means it is sending IPv6 packets through an IPv4 connection to communicate with IPv6 servers. I found out myself the xbox doesn't
like this at all. My ISP doesnt support IPv6. When I would look at my connection on my xbox it would say IPv4 and IPv6. So O went into my router settings and sure enough my router was set to tunnel IPv4 to IPv6. I went through set to IPv4 only and it solved
my problem. This causes a teredo error in your xbox.

I'm not sure. How can I check if my router is tunneling it through Ipv4?

Hi, Gina. My name is Ron, I'm an independent advisor. I will be more than happy to help you.

Only selected home routers support Ipv6. I would recommend checking it on the manual of your router or contacting your Internet Service Provider if they support Ipv6. They should also provide you with the correct steps need to be done on your router settings to set it up.

The Xbox will automatically go on ipv6 if your internet provider supports it.

I have the same issue.

I am connected in IPv4 but my ISP has IPv6. MY set up - I have my xbox plugged directly into my modem a Hitron CGN 3.0. I have checked my Modems settings and there is no setting to turn IPv6 off or on. AM I missing something?