Netgear Netgear CG3000/3100: Service info unavailable

that is happening to me right now. How do I fix it?

Hey there Omsio!

When you set up Internet Bridge Connection did you reset Xbox network settings back by default? Can you confirm if you have the Netgear CG3000 model. Did you unticked
UPnP when you set up Port Forwarding? Make sure your Netgear is running on the latest firmware. Visit manufactures website for firmware update.

I would suggest updating firmware if that doesnt help then visit netgears troubleshooting site for more info on port forwarding and port triggering netgear is the best for xbox though I have one and it kicks.

I'm a bit confused about what you mean by "this device is linked to an actual router".

From the specifications, the LB2120 takes a wired WAN (e.g. from a DSL or cable modem), and also supports 4G cellphone based connections.

Such a setup is fine for fault tolerance or speed boosts, if the 4G network is significantly faster than your DSL or cable connection.

However: most internet providers don't have enough IPv4 adresses for cellphone connections, and therefore use CG-NAT and tunneling techniques like DS-Lite to tunnel IPv4 through an IPv6 address. So multiplayer via cellphone connections hardly work properly.

As for your Nexxt Solutions router: If that really is a router, and not just a cable modem, then you have a double NAT, as the Nexxt router and your LB2120 are both NAT devices.

And, to top it off, your ISP might also do CG-NAT on your cable/DSL connection, which would give you a triple NAT.

Is there a specific reason to why you need the LB2012 for your Xbox? If it's about the "speed" you'd get from the 4G connection, you can use that speed only for downloading games faster. It will not help you for multiplayer or Party chat connections.

If possible, connect your Xbox as "close" as possible to the internet connection with as few devices between the console and internet. Which means to plug it into the Nexxt Solutions router.

When on the router, use your PC to sign into it's configuration page, and take a note of the Nexxt Solutions WAN IP address (i.e. the IP you get from your internet provider). Then surf to a page like https://www.whatismyip.com/ and
make a note of the "Your Public IP" address. If the public IP from the page and the WAN IP on your Nexxt Solutions router are different, your ISP is using CG-NAT and you need to contact him to ask for a proper public IPv4 Address that is not NATed.

Hi Blah Blah Blah!

Thank you very much for bringing this issue to our attention. Are you trying to connect an Xbox One or Xbox 360 to your WiFi? The answers stated above are all great troubleshooting steps to try in order to resolve this issue. We also recommend using this
article
Xbox One Network Connection Error Solution. These solutions are for the Xbox One. If you need the solutions for the Xbox 360, please let us know. Be sure to let us know the results!