Does anyone know what's the default TCP window size for iperf3? It is not mentioned in the manual and I also can't find it in the output, when running a test.
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You're best running a packet capture (Wireshark/tcpdump) to see what iperf is using by default on your system.
Personally, I'm seeing 29200 Bytes on Linux and 65535 on Windows.
Mark Riddell
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