Sagemcom F@st 5250: MY Xbox1 wont connect to the internet with a direct wired connection,...

Hello!

When in doubt, hard wire it out. Usually fluctuation in performance or internet speeds is due to wireless interference that can come from many sources. Even if it is not realistic to have it hardwired via eithernet as a long term fix, I would try it and
run your speed tests again to see if that is the issue. If this solves your problem you can start to figure out where the source might be coming from.

Good Luck, Hope this helps

Obie

Hi, IPV6 can only be provided by your internet provider. You will need to contact them and ask them if they support it or not.

They do support it and it is enabled on my router settings IPv6 is enabled on my sagemcom router

That sounds annoying. Please try doing a factory reset on the console. There's an option to keep installed games and apps so you won't need to redownload them and your saves will be safe on the Cloud.

You can read how to do the reset via this link https://support.xbox.com/en-US/xbox-one/console/reset-console-to-factory-defaults

Check this link for a possible solution:
https://support.xbox.com/en-US/xbox-one/networking/unable-to-connect-solution

Don't waste your money with Geeksquad. You've already talked to your ISP and they weren't able to help? Why do you need IPv6?