How to Prove Your ISP Is Throttling You, With Real Data - iPerf3 Blog (iperf3app.com)
You can prove ISP throttling with iperf3, but only if you set the test up correctly. Here is what throttling looks like, and how to gather evidence.
Support says the line is fine. Rule out your Wi-Fi with a LAN test, then hit the same remote endpoint every hour and log it.
A dip that lands at the same evening hour survives a modem reboot, and support has to answer that graph.
[iperf3app.com](iperf3app.com/blog/prove-i...)
