How do I enable IPv6?

Hello John, sorry to hear you're having trouble with your connection.

Once you turn on IPv6 in your modem/router it should automatically connect on your console. If you have turned it on and it's not connecting then that suggest your service provider may not support it or the plan you have doesn't. I'd recommend getting in touch with them for more help.

IPv6 is enabled automatically by the Xbox if you have it. You can only have IPv6 if your internet provider supports it. If you have IPv6 then double-check the router settings. It may need to be switched on. If you do not know how to do this, then you will need to check how either on your router manufacturer's website or the manual it came with.

if your isp supports it and your router has been configured for ipv4 and ipv6 then the xbox would auto setup for ipv6. it is not important and ipv4 will work just fine.

Talk to your ISP about enabling IPv6 on your network hardware. There are advantages for playing multiplayer games with IPv6 connectivity.

More information on Microsoft Xbox support link, IP6 on Xbox

Check the age of your network hardware. It may need updating to a newer model and/or version of hardware.

Your ISP should advise you.

Follow the instructions on here https://support.xbox.com/en-US/help/hardware-network/connect-network/ipv6-on-xbox-one