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Whenever I try playing League of Legends (a multiplayer game) or be in a Microsoft Teams call, etc. it keeps disconnecting every few seconds, and then reconnects after a few seconds as well, and keeps on like that in a never ending loop. But when I play a different multiplayer game like CSGO, or be in a Zoom call, everything is fine. The internet itself is also working fine, connected and getting my max download/upload speeds.

When I use a VPN (A commercial VPN, like Nord/IPVanish) everything is fixed, but I can't rely on a VPN, primarily because I need to have work meetings on my work laptop that is connected to the company's VPN as well.

I tried contacting my ISP several times, but they keep saying everything is fine on their end.

I tried changing my DNS to Google/Cloudflare and the problem still occurs. I also tried disabling IPV6. I am not behind CGNAT and I have UPnP enabled and working. I also tried turning off my router's firewall.

This problem occurs in multiple computers, different RJ45 cables, etc. So the only culprits in my opinion are either the modem&router or the ISP.

Is there anything I can do to further troubleshoot this problem on my end? My modem&router is SAGEMCOM F@ST3686VB

Thanks in advance.

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  • If you can try another modem&router, this will give additional info about the cause.
    – harrymc
    Jun 2 at 19:37

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