"No network connection--please check your internet connection"?

I have the ATV 4K (2021) model and noticed the following: when the ATV is in Standby/Sleep mode, the Ethernet interface will switch to the lower 100Mbps speed, and then after a while switch back to Gigabit. I don't know if your ATV 4K is doing this or not. I found a work around for this was to make the ATV 4K a Home hub. Now the interface stays up all the time. I opened a thread on the "MacRumors forum https://forums.macrumors.com/threads/apple-tv-4k-2021-ethernet-switching-between-100-1000mbps-in-sleep-mode.2304654/

and got the tip to try setting it up as a Homehub. I don't have any HomeKit devices on my network, but they are not needed.

My ATV 4K is at latest code level.

Hey there!

Thanks for updating us. Ever since this issue started to occur, have you been able to reset your home network to see if that might help? If you've already done this with no success, the last troubleshooting step you can attempt with your Apple TV, would be to restore it back to factory settings. If you're not familiar with this step, check out the resource below:

Reset or restore your Apple TV to its factory settings - Apple Support

Now, if this step doesn't solve your issue, we strongly recommend that you reach out to Apple Support for additional help. They can investigate this issue further with you. Just in case, you can use the link below to reach them:

Get Support

Select More > Apple TV. Thank you for using Apple Support Communities. Cheers.

Yeah, I agree with you. I only did it as a temporary solution because the Ethernet link changes were filling up my logs on my Cisco managed switch.

I also have a ATV 4K (1st Gen) model and I think the Gigabit interface has gone bad. It won't even negotiate the speed to Gigabit anymore, it only works at 100Mbps. And to make things worse, when in Standby mode, the interface would go down and not come back up until the unit was powered on. That's when I decided to get the latest ATV 4K model.

My guess this is a software issue. What version of code level are you running and is it the 1st or 2nd Gen ATV 4K? I'm not sure I have an answer for you if you don't have any other Apple products to enable the Homehub function. Make sure to report this issue via the product feedback website: https://www.apple.com/feedback/

Hopefully, some other folks will provide feedback on this problem.

Leave it connected to Ethernet during the setup of Homehub. You may have to Google some steps for using the Mac. I did this on my iphone.

On the Apple TV Go to Settings > Users and Accounts > make sure you're logged in with your Apple ID, Home Sharing =Apple ID

Go to Settings > Airplay and Homekit > Airplay=on Access=Everyone, Conference Room Display=off, Airplay Display

Underscan=auto, and Room = Select a room... if i highlight Room, message

was saying "Currently syncing with icloud. this may take a few minutes" .. This is when I went to my iphone and started the Home application and from there it walks you through the setup, asked me to bring the iphone near the Apple TV so it could sync (i guess). It then prompted me for the room name that was assigned to the Apple TV. Once that was done, the Apple TV Room automatically filled.

One last thing is to make sure is that Two Factor Authenication is setup, otherwise, it will complain. Hope this helps...

I see other folks reporting this type issue on other forums..

https://www.reddit.com/r/appletv/comments/p5lx5e/youre_not_connected_to_the_internet_happening/

Hello warrenfromdublin 15.

Thank you for using Apple Support Communities. It sounds like you're experiencing issues when using your Apple TV. Specifically, you're getting prompted of a connection issue, however you're not losing connecting and your connected directly to your internet network. We can understand how this would be an issue. Allow us to investigate this issue and assist in any way we can.

You've done a tremendous job in troubleshooting your Apple TV. Just to confirm, if you connect your Apple TV to a different network, does this specific error message continue to populate? We would like to recommend a couple of helpful troubleshooting steps you can try. First, you can try to restart your Apple TV. Also, if you have any pending updates available for your Apple TV, it would be best to install them. Keeping your Apple TV fully updated can help resolve various issues and also help with overall performance. Just in case, the resources below can guide you:

Restart Apple TV - Apple Support

Update your Apple TV - Apple Support

We hope this information is helpful. Best of luck