Home > General Administration > Tools and Troubleshooting > Troubleshooting client speed and traffic shaping using Jperf

Troubleshooting client speed and traffic shaping using Jperf

Table of contents
No headers

Jperf is a free Java-based GUI tool that performs all the functions as Iperf for those who prefer graphical output and point and click functionality. Jperf is a very useful and trustworthy tool to measure throughput and jitter between two devices in your LAN or WAN. Most online speed tests like speedtest.net or speakeasy.net are not highly accurate because they introduce considerable delays and uncertainty to the measurement. Factors like test server location, concurrent Internet activity, and/or proxy server participation can affect the online test results due to the additional network activity added to the measurement. Using Jperf allows to have an unbiased measurement of your LAN and WLAN throughput with no delays added by uncontrollable variables. This article describes how to install and use Jperf to test data throughput accurately. 

Prerequisites: To run this test you will need two networked computers which have access to each other through your local LAN/WLAN. Java must be installed and supported in both computers.


Test scenario

This article describes how to test wireless and wired throughput between two hosts interconnected by a Meraki AP and switch. One of them is connected via wireless access, the other one is connected via wired access. Please refer to the diagram below.



1) Download the Jperf (for Windows). 

2) Extract the Jperf file in your desktop. 

3) Open the Jperf  folder and execute the jperf batch file (You need Java installed in your workstation).  


4) The following GUI is going to open. Repeat this procedure in the two workstations.


5) On host B (server), please select "Server" under "Choose iPerf Mode". the "Listen port" by default is 5001. You can change it as desired. Click on "Run Iperf". 







Note: When prompted, please allow inbound access to the Iperf server ports in Windows firewall. 



6) On host A (client), please select "Client" under "Choose iPerf Mode". Specify the server's IP address and port (default port is 5001). Click on "Run Iperf". 


7) You will get a Bandwidth and Jitter graph. A command output is also available with the test results. 


Last modified



This page has no classifications.

Explore the Product

Click to Learn More

Article ID

ID: 1740

Explore Meraki

You can find out more about Cisco Meraki on our main site, including information on products, contacting sales and finding a vendor.

Explore Meraki

Contact Support

Most questions can be answered by reviewing our documentation, but if you need more help, Cisco Meraki Support is ready to work with you.

Open a Case

Ask the Community

In the Meraki Community, you can keep track of the latest announcements, find answers provided by fellow Meraki users and ask questions of your own.

Visit the Community