84
www.cooperbussmann.com/wirelessresources
Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 2.19
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 (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 give 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 ensure that the module has been reset. See “3.10
Advanced Radio Configuration.”
NOTE TCP throughput test must be run using Microsoft Internet Explorer 8 or later.
Figure 87 Throughput Test Configuration
To run an internal throughput test:
1. Connect to the webpage of the module that will be performing the Iperf test.
2. Select “System Tools” on the right pane of the webpage, and then select “TCP Throughput Test.”
The screen shown in Figure 88 appears.
Figure 88 Throughput Test
