Ethernet keeps disconnecting and connecting

Hello there @JackieHorner, I hope everything is going well!

Thank you for reaching Microsoft Xbox Forum support. I am sorry to know about the connection situation, but I want you not to worry about it because I am here to help you out! I believe your console might need either a network reset or just a system refresh.
I would like you to go through the following steps to clear the Mac address and then perform a quick power cycle on your console:

Settings > Network Settings > Advanced Settings > Alternate Mac Address > Clear it and the console should restart. It would definitely help if you could restart the internet router while the console is restarting.

After going through the troubleshooting steps mentioned, I invite you to perform a quick power cycle by turning off the console and then unplugging all the cables. After 2 to 3 minutes, re-plug them back again, then restart your console to check if it's
installing this time.

Another thing you should check is your NAT type. I would like you to check your NAT type if open because that could sometimes interfere. to check for the NAT type you can follow the steps below:

Settings > Network Settings > NAT type => It should be open.

If the NAT type is not open, you will need to open some ports with your internet provider. These ports must be open for Xbox Live to work: Port 88 (UDP) Port 3074 (UDP and TCP) Port 53 (UDP and TCP) Port 80 (TCP) Port 500 (UDP) Port 3544 (UDP) Port 4500
(UDP).

In case the issue still persists after the previous steps have been performed here is the official link to all the network troubleshooting steps that can help sort this out for you.

The link: Troubleshoot your network connection speed | Xbox Support

In case the issue still persists, the next step would be to perform a reset on the console. To do so you will need to follow the steps below to perform a reset on the Xbox :

Settings > System > Console Info > Reset This Xbox > Reset and Keep my Games and Apps.

Note =>The "Reset and Keep my Games and Apps" option will not cause losing your games, but please be aware that you need to be completely aware of the email address as well as the password of your account before going for it because it will require you
to sign in to the account.

I wish you a lovely day, and I hope this helps you out! All the best!

Kind Regards

Stay safe, and happy gaming!

Feel free to give us your feedback by voting below if the reply was helpful!

Let me know how that is working out for you. Also, if you can connect directly with an ethernet cable to sharpen your connection, that might help prevent the disconnects. Pop back onto the forums and keep in touch.

Are you using a wired connection? If your Xbox says the ethernet cable is not connected, have you tried disconnecting and reconnecting the ethernet cable?

Is the console always disconnecting on the (more or less) exact time at night?

A lot of internet providers force a disconnection every 24 hours to prevent you from running a server on your internet connection, as the disconnect will give you a new external IP.

Can you try to connect the console via an ethernet cable just for testing purposes to see if the disconnects still happen, so we can limit troubleshooting to the wireless connection (if the ethernet cable works the whole time), or if we need to troubleshoot
"further up" if the ethernet cable also disconnects at night?

Not with ethernet I meant, but with Wi-fi it seems to connect fine. Is it possible to have good connection on ethernet? I disconnect when I use it now for some reason.