Hey everyone, I've been having a frustrating issue with my home internet for about 2.5 years now. It cuts out for approximately 1 second, exactly every 30 seconds, which I can predict using a ping test. This happens across all my devices, including laptops and phones, regardless of whether I'm on Wi-Fi or using an Ethernet cable. I've tried resetting my router and updating everything, but the problem persists. The internet works fine on other networks and when using mobile data. I believe the issue might be with my ISP because they haven't been able to detect anything wrong despite multiple calls. I'm hoping someone out there can help me troubleshoot or point me in the right direction. Thanks!
4 Answers
Have you checked if there's an unintentional LAN loop in your setup? Sometimes cables get crossed or connected incorrectly by accident, leading to all kinds of connectivity issues. Might be worth a look!
Since you've ruled out the hardware by replacing the router and the issue appears on all devices, it looks like it could be a misconfiguration or an issue with your ISP's network. I recommend doing a concurrent ping test where you ping both your router and an external site at the same time. This will help narrow down whether the issue lies with your local network or beyond.
Also, consider checking your SFR router's settings for any power-saving features or firewall settings that might affect the connection. Features like "Eco Mode" should be disabled to see if they’re causing the interruptions. If you find anything odd, let SFR know about the documented behavior at the second hop of your traceroute – they might respond better to specific technical details.
Just a tip: using WinMTR can really help identify where the connection drops are happening. It combines ping and trace routes, showing you if there's packet loss at different hops on the route. It's a great way to gather evidence for your ISP!

I looked into that and don't think I have any loops. All my cables seem fine, and I haven’t made any changes to the network except while troubleshooting this issue.