How to fix iperf connect failed: Operation in progress
Problem:
When running iperf -c [IP address] you see this error message:
iperf_error.txt
connect failed: Operation in progressSolution
You are running different iperf versions on the server and the client. Typically this error occurs if the client is running iperf 2.x whereas the server is running iperf 3.x.
Check using iperf --version. In my case, on the client, it was
iperf_version.txt
iperf version 2.0.13 (21 Jan 2019) pthreadson OpenWRT.
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