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245U-E Wireless Ethernet Modem User Manual
121
Rev Version 2.24
Appendix D - EXTERNAL IPERF TEST
This appendix shows how to set up and use the Iperf application to test the throughput of Ethernet
modems. Iperf is a tool used to measure the throughput and quality of a network link. Jperf is used in
conjunction with Iperf and displays the Iperf data results graphically. The following instructions cover Iperf
and Jperf, but not the setup and configuration of the modems. Modem setup instructions are provided in
earlier sections of this manual.
Materials
• 2 x Ethernet Modems configured as a bridge.
• 2 x PC computers with Ethernet ports.
• Suitable power supplies for the Ethernet modems.
• Straight-through Ethernet cables.
• Iperf / Jperf application.
Installation
1. Download the application from the link, http://sourceforge.net/projects/iperf/, and save to a location
on your PC.
2. Extract the zip file to the ROOT directory ( C:\ ) on your PC.
The extracted folder contains the main Iperf application as well as the Jperf graphical interface.
3. Copy the extracted folder to the second PC, or download to the second PC and extract as described in
steps 1 and 2.
Iperf Applications
The Iperf /Jperf application needs to be run on the PC or laptop at each end of the wireless link that is to be
tested.
1. At the server PC, open a command prompt by opening the Windows Start menu, choosing Run and
entering “CMD”.
2. When command prompt appears, set the directory to where the Iperf application resides (the location
where it was saved in the previous procedure). From here run the Iperf server command “iperf –s” (see
Figure 101).
Iperf server application is now running and waiting for a client connection.
NOTE If you get a security pop up on the PC, select Unblock for the application to run.