Download iperf3 3.13 (Mac) – Download Free

iperf3 A measurement tool for TCP, UDP and SCTP networks that can be used to assess bandwidth usage. Also, iperf3 is a command-line utility developed by Energy Science Network (ESnet).

Test your network bandwidth via the command line

The latest iperf3 version is only available as source code, so to use its functionality you must manually compile and install it through the Terminal application. Note that you can find installation instructions in the iperf3 archive, but the application follows the typical process.

At the command line, you must type the following commands consecutively: ./configure; make; to install. If all goes according to plan, just type the iperf3 command to see the instructions.

Note that the iperf3 options you see on the command line represent the latest documentation available for the tool, so you will have to study that guide to see how to access certain parameters or commands.

Depending on your command, iperf3 will start monitoring different parameters related to bandwidth usage, data loss, protocol, buffers, timing, etc.

Network Bandwidth Test and Measurement Tool

iperf3 allows you to specify the port to listen on, the format of the report (if you want the application to run in server or client mode), and more. Collected data can be sent to log files or in JSON format.

Also, iperf3 enables you to set the maximum size of a TCP or SCTP segment, works only with IPv6 or IPv4, and so on.

In summary, iperf3 packs measurement tools for sizing maximum bandwidth and observing various network bandwidth parameters, but take into account that you have to compile the project from source and learn the correct syntax to use its features via the command line.