Windows iperf3: Difference between revisions
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If you're needing to speed-test your internet service then you can use web-based speed testers such as https://speedtest.aa.net.uk, but they may not always give you accurate results. An alternative is using a tool called iperf3 to run a speed test against an iperf3 server that is hosted at your ISP. |
If you're needing to speed-test your internet service then you can use web-based speed testers such as https://speedtest.aa.net.uk, but they may not always give you accurate results. An alternative is using a tool called iperf3 to run a speed test against an iperf3 server that is hosted at your ISP. |
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iperf3 is a program that is easily installed on many Linux distributions, but is a little harder to use on Windows. |
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Here is how to download and run iper3 on Windows and how to test single and multi-thread upload and download speeds. - This uses the Andrews & Arnold speed test server, which is only available to customers. |
Here is how to download and run iper3 on Windows and how to test single and multi-thread upload and download speeds. - This uses the Andrews & Arnold speed test server, which is only available to customers. |
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Revision as of 12:47, 12 Haziran 2023
If you're needing to speed-test your internet service then you can use web-based speed testers such as https://speedtest.aa.net.uk, but they may not always give you accurate results. An alternative is using a tool called iperf3 to run a speed test against an iperf3 server that is hosted at your ISP.
iperf3 is a program that is easily installed on many Linux distributions, but is a little harder to use on Windows.
Here is how to download and run iper3 on Windows and how to test single and multi-thread upload and download speeds. - This uses the Andrews & Arnold speed test server, which is only available to customers.
The version of iperf3 we have here is 3.13 from June 2023 - and is newer than the version that is hosted on the official iperf.fr website and so has a lot of bug fixes. - thanks to Mini for compiling this.
1)
Download File:Iperf-3.13-windows-x64.zip and save it to your computer, eg in your Downloads folder.
2)
Right click on it, and select Extract all.
3)
Open up the Command Prompt - Click Start then type cmd and click on the 'Command Prompt' icon.
4)
In the black box type: cd Downloads\iperf-3.13-windows-x64
5)
Run an speed test by typing: iperf3.exe -c speedtest.aa.net.uk (you may need to click 'allow access' if a Windows Defender window pops up
By default, this will run a single-thread upload speedtest (sending traffic TO the speed test server). As you can see in the screenshot, the upload speed this line happens to get is just over 19Mb/s.
Variations
There are variations you can do to test the speed as follows by using the -R (reverse) and -P Parallel options:
- Run a single-thread Download test:
iperf3.exe -R -P1 -c speedtest.aa.net.uk - Run a single-thread Upload test:
iperf3.exe -P1 -c speedtest.aa.net.uk - Run a 10-thread Download test:
iperf3.exe -R -P10 -c speedtest.aa.net.uk - Run a 10-thread Upload test:
iperf3.exe -P10 -c speedtest.aa.net.uk
What to look for:
- The results should be near to the speed you'd expect for your line.
- You may want to run the tests at different times of day so as to see if there is any peak-time congestio0n affecting you.
- Hopefully the single and multi-thread tests give similar results - if not, there may be some sort of problem.