Charter Communications: Xbox One: IPv4 to IPv6

Do you connect through dual-stack?

So my roomate and I have a similar issue. We can both play simultaneously if we are not joined in a party. But if we do join in a party, we get the everlasting "Connecting..." message while trying to start a game.

Some random details about our setup:

ISP: Charter Communications

Modem: Cisco something or other

Router: Asus flashed with TomatoUSB

IP: IPv4 shared with NAT, and IPv6 "native" through Charter's 6rd tunnel with router advertisements sent onto the LAN with dnsmasq

I don't have a strong background in networking, nor the equipment to do much more than poke at this. But I did setup wireshark to do some packet sniffing, seems the XBox One sets up a teredo tunnel exclusively for Xbox Live connectivity (IPv6 tunneled over
IPv4), and downloads generic content over IPv4 from Akamai.

Best I can tell, I did not observe either Xbox One sending packets to the other at any point while trying to play as a party. It's somewhat tricky to really know though, since I can't get a command shell on the Xbox, and they don't report the IPv6 address
in the network menu.

Anyway... very frustrating, and I've no idea if the issue is in our setup (*everything* else works fine), Charter's 6rd infrastructure, Microsoft's teredo infrastructure, the Xbox One's networking code, or just a bug in Titanfall.

I have Charter Internet, and I only have IPv4. I checked on their website, and it says they will be implementing IPv6 in the "future". As long as "future" is less than 3 years away, I'm fine.

It does it automatically if your service provider supports IPV6. It will show as IPV4 & IPV6 under network status.

If it's only showing IPV4 then your provider does not support IPV6 and/or there is a communication problem between your router/modem and your Xbox.

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.