IPv4 only no IPv6 network connection

what worked for me: Disabling IPV6 for the network - so only IPV4 is used to connect to the router!

Was hoping one of them would explain it!

Not sure what else to suggest really as I am not an expert at networks etc. Might be worth looking into whether your router is using IPV4 or IPV6 and, if on IPV4, adjusting it so it connects using IPV6 (assuming your ISP even allows IPV6..mine doesn't). IPV4 allows networks to connect to IPV6 by using a Virtual Adapter (not sure how to describe it better but your get the idea)..however, the adapter is problematic at times

Hello John, this is Manuela!. I'm an Independent Advisor and community user like you, ready to assist with this.

Theoretically, IPv6 is better than IPv4 because IPv6 has more improvements. If your ISP and router supports IPv6 your Xbox is going to use it automatically and the Xbox network is prepared to work with IPv6, if maybe that's not the case you don't need to worry if your Xbox only uses IPv4.

You can learn more about IPv6 on Xbox by visiting the next article:
https://support.xbox.com/help/hardware-network/...

It might be that your ISP is using IPv6 and tunneling IPv4 via CG-NAT and DS-Lite.

While IPv6 is generally a Good Thing to have (as the Xbox One primarily uses IPv6, and even if you only have IPv4, it will use IPv6 tunneled through IPv4), you might want to check with your ISP if they offer you a "Dual Stack" connection with IPv6 and a
real public IPv4 in parallel.

There really isn't much you can do on the console itself, as it does check automatically what IP protocol your ISP provides, and if it's IPv6, then the console will use IPv6. If it's a Dual Stack, where you have IPv4 natively (not tunneled through IPv6)
and IPv6, then the console will use both, and if it's an IPv4 connection, it'll tunnel IPv6 through IPv4 through Teredo.

Most people have a home network behind a router/modem from their provider. The home network is not public at all and the only item with a public IP is the providers equipment; essentially your local demark point to the internet.

What you do inside that private network doesn't really matter.

IPv6 on Xbox One

Xbox One can connect to networks using two protocols that allow devices to transmit information: the traditional IPv4 communications protocol, and its newer version, IPv6. For Xbox One to connect to the internet using IPv6, your home router needs to have
IPv6 enabled, and your internet service provider (ISP) must support IPv6.

What’s IPv6?

Internet Protocol version 6 is the most current network protocol, bringing several improvements over IPv4. Most important, IPv6 expands the number of possible IP addresses (the unique numbers that represent every device on the internet). And—most useful
for Xbox—the expansion removes the need for
Network Address Translation (NAT), which can interfere with multiplayer gaming and chat over IPv4 networks.

What if my Xbox One isn’t connected using IPv6?

Your Xbox will work normally without IPv6 connectivity. However, for the best possible experience, we recommend enabling IPv6 on your network. Several Xbox One features already make use of IPv6, and we’re building more.

How can I tell if my Xbox is connected using IPv6?

Here’s how to check:

1. On your controller, Press the Xbox button
   to open the guide.
2. Select System > Settings > Network.
   
3. Select Network settings.

If your Xbox One has IPv6 connectivity, your Current Network Status will read
IPv4 & IPv6. (To see your actual IP and gateway addresses, select
Advanced settings.)

My Xbox is using only IPv4. What should I do to add IPv6?

Several home routers support IPv6 but disable it by default. Check the manual for your router, or visit our
Networking Hardware Information support forum.

My router has IPv6 enabled, but my Xbox is connected on IPv4. What else can I do?

Try contacting your ISP to see if IPv6 is available in your area.