Bandwidth Test Print

How to Run a Bandwidth Test with iPerf3

What is iPerf3?
iPerf3 is a tool used to measure network bandwidth between two hosts. It’s commonly used to test upload and download speed between your server and a remote test server.

Step 1: Install iPerf3

On most Linux distributions, you can install it with:

apt install iperf3

Step 2: Run a Test

To run a test, use the following command:

iperf3 -c ping.online.net -p 5208 -P 25

• -c → specifies the server to connect to (in this case ping.online.net).
• -p → sets the port number (example: 5208).
• -P → number of parallel streams (use 25 for heavy test or 3 for lighter test).

Example with fewer streams:

iperf3 -c ping.online.net -p 5208 -P 3

Notes

• The higher the -P value, the more parallel connections are tested.
• Using 25 streams puts higher load on your connection, showing maximum possible bandwidth.
• Use 3 streams for a lighter test.