Network issues only on my Mac

[IAmAndre]

Hi,

 

So I recently moved to a new house and I'm having some internet issues. I have fiber at home at 100mbps and I'm able to get that speed on some devices but not on others.

 

I have the main router installed in the living room by my ISP, which is then linked to a central box that handles the ethernet ports in every room of the house. I then installed my own router in my bedroom/office. My main PC is connected to this router via an ethernet cable and I'm able to get full speed without any problem. My phone also connects to this router via WiFi and it works just fine. Now when I try to use my Mac on that router, I'm often disconnected. So I still appear as "connected" to the network, but every 5-10 minutes I have no internet access for about a minute. Every time this happens, all my other devices are working just fine, I can use the internet at full speed on them. For example, I can't watch a Twitch steam on the Mac, I have to use my phone to avoid interruptions. This morning, it went even worse because I had no internet at all on the Mac. I rebooted it and it went back to working as before with a disconnection every now and then.

 

Now this only happens on this particular network. I never encountered this issue on any other WiFi network. It does happen a bit when I connect the Mac to the main router provided by the ISP, but it's much rarer. What could be the issue here?

 

Now I also have a similar issue, but on my TV. It's a new TV so I don't know if the TV has an issue or not, but it's connected via WiFi to the main router. Again, all devices work fine besides the TV. When I test the internet speed using the built-in web browser, I'm getting around 30-50 mbps, which should be more enough for YouTube. However, I often have playback issues, with videos pausing sometimes for several minutes. This happens more often with 4K 60fps videos but even regular videos pause every now and then. There is a network troubleshooting tool on the TV and when I use it, it sometimes shows that the TV properly connected to the router, but the router doesn't have internet access. When this happens, all the other devices are able to connect to the internet just fine.

 

So I'm quite confused right now. Why is it that some devices don't seem to like that router while other work just fine? Could it be that the router is faulty, or are there any steps I could take to troubleshoot the issue?

 

Thanks