iperf was developed by NLANR/DAST as a modern alternative for measuring maximum TCP and UDP bandwidth performance. Iperf allows the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, and datagram loss.

iperf version 2 (in this repository) is no longer maintained by its original developers. Current ESnet development efforts are focused on version 3 of iperf (otherwise known as iperf3), which is available at:


Meanwhile, a third party has taken up development and maintenance of iperf2. As of this update (November 2017), this work can be found in the following repository:


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User Reviews

  • The quick and easy tool for testing multicast routing.

  • Iperf is good! Thanks.

  • I am not able to see the video of these tutorials. If I could it is really a good job

  • Iperf is good and this will help others also, please try to download and check it.

    4 users found this review helpful.
  • Unable to get any documentation on the application except the help command. Joined the site to try and get some help and found that I need to be a developer to get the documentation. Very frustrating first 30 minutes and still have not even run iPERF. Lou

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