Weidmuller Wireless Ethernet Modem & Device Server WI-MOD-E-G/A User Manual
Rev.
2.16
www.weidmuller.com
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4.4 - Throughput Test
The performance of a wireless link is best measured in terms of the maximum throughput that can be achieved. The
recommended method of measuring throughput is with the "Iperf" utility. Iperf has client and server functionality, where the
server waits for a client connection. For wireless links, it is recommended that Iperf throughput testing is performed on
point to point links while the remainder of the wireless network is inactive (i.e. not sending any data).
Iperf is built into the modems for convenience, and allows measurement of TCP throughput with default Iperf parameters.
The internal Iperf utility always gives a lower result than running Iperf externally because of the additional load placed on
the internal microprocessor. Even so, the throughput results still gives an excellent indication of link performance as long
as you compare the measured result against the expected result in the table. See APPENDIX D - “External Iperf Test” for
details on running this application externally.
Internal Throughput Test
Before testing ensure that the end node of the Wi-Fi Link that you
wish to test has the Iperf Server enabled under the Advanced
Radio Settings page and Saved to Flash and the module has been
reset. See 3.10 - “Advanced Radio Configuration”
Connect to the web page of the module that will be performing the
Iperf test, select “System Tools” link on the right hand side of the
webpage and then select “TCP Throughput Test” and you will see
the Screen as shown below.
Figure 77 - Throughput Test
Note: TCP Throughput test must be run using Microsoft Internet Explorer 8 or later
Enter the IP address of the remote device that you wish to test and press the “Measure Throughput” button.
Figure 78 - Iperf
The specified IP address must be running Iperf in Server mode (if the remote modem does not have the Iperf server
running then you will get the following Error message on the web page, “Iperf error, check connectivity to server.” Ensure
Figure 76 - Throughput Test Config
