@Sevii

As I said, the problem is certainly not the Internet box but your switch with the connection.

With this error message, is the switch not connected directly to the Internet box with a short LAN cable?

Assume you have already unplugged the switch from the power supply shortly after restarting the Internet box.

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@Sevii wrote:

@WalterB I tried with the short cable, the same problem. I also tried the 5 seconds after reboot. Neither worked.

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Is that correct if you connect the long cable to the PC without a switch as a test? Then it will work without any problems for a long time and a speed test with the PC also shows the speed of the Internet box?

This TV on the switch is the one without TV-Box but only with the apps?

@Sevii

So my guess is that this switch is the problem and not the Internet box and the connected devices.

You don’t have this switch but another one?

[https://www.swisscom.ch/de/privatkunden/produkte/netzwerkzubehoer/details.html/ethernet-switch-11028114?useCase=HARDWAREONLY&quantity=1] (https://www.swisscom.ch/de/privatkunden/produkte/netzwerkzubehoer/details.html/ethernet-switch-11028114?useCase=HARDWAREONLY&quantity=1)

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@Sevii wrote:

@WalterB Yes, I have exactly this switch and everything was running smoothly this morning, see screenshot. It was still connected this morning, but suddenly it wasn’t anymore

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At the very beginning you stated this, is that no longer the case?

[https://www.digitec.ch/de/s1/product/zyxel-gs-105b-v3-5-ports-netzwerk-switch-5665074?supplier=406802] (https://www.digitec.ch/de/s1/product/zyxel-gs-105b-v3-5-ports-netzwerk-switch-5665074?supplier=406802)

@Sevii

Try the internet box at the back again for 10 seconds. Turn it off and on and I wouldn’t do a reset for the time being because that’s really only necessary if there are major problems.

Then turn on the switch for 10 seconds. Switch it off and on, but only when the LED on the Internet box has been lit white for 5 minutes.

N.b. Is that correct when the switch has power again then the “Power” LED lights up and the other LEDs where devices are connected and switched on also flash?

@Sevii

The switch is described at the link, important if you reset the switch (emergency) then the special configuration file must be downloaded and installed.

[https://www.swisscom.ch/de/privatkunden/hilfe/downloads.html#tab=heimvernetzung&acc-5zUEyw%5Bselected%5D%5B%5D=0] (https://www.swisscom.ch/de/privatkunden/hilfe/downloads.html#tab=heimvernetzung&acc-5zUEyw%5Bselected%5D%5B%5D=0)

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@Sevii wrote:

@WalterB I tried with the 5 seconds for both, it didn’t work. It detects that it is connected but no internet is detected.

Where do I upload the configuration file?

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Yes, you have reset the switch, which is not good if you are not very familiar with it, the configuration file is available at the link.

Assuming it’s the SG 2008 Switch?

Is the switch now displayed in the Internet box menu?

What do you mean by no internet displayed, how do you get into the community now?

You once mentioned it always works via WLAN, are you now using a notebook to access the Internet?

N.b. I mentioned above in minutes because the Internet box needs several minutes when switching off and on until the white LED lights up and then wait another 5 minutes before switching the switch off and on.

@Sevii

You don’t change the IP6 address but adapt the IP4!

Sevii

Try deactivating IPv6 if it is activated and then switching the Internet box off and on again, including the switch process.