NOTE: The iperf3 issue tracker is for registering bugs, enhancement requests, or submissions of code. It is not a means for asking questions about building or using iperf3. Those are best directed towards the Discussions section for this project at or to the iperf3 mailing list at A list of frequently-asked questions regarding iperf3 can be found at


  • Version of iperf3:

  • Hardware:

  • Operating system (and distribution, if any):

Please note: iperf3 is supported on Linux, FreeBSD, and macOS. Support may be provided on a best-effort basis to other UNIX-like platforms. We cannot provide support for building and/or running iperf3 on Windows, iOS, or Android.

  • Other relevant information (for example, non-default compilers, libraries, cross-compiling, etc.):

Please fill out one of the “Bug Report” or “Enhancement Request” sections, as appropriate. Note that submissions of bug fixes, new features, etc. should be done as a pull request at

Bug Report

  • Expected Behavior

  • Actual Behavior

  • Steps to Reproduce

  • Possible Solution

Enhancement Request

  • Current behavior

  • Desired behavior

  • Implementation notes