On Tue, Mar 29, 2011 at 12:14:18AM +0800, 清 廖 wrote: > I use two PCs and one router to establish a 802.11b network in my lab.
Afaik, 802.11b is limited to 11Mbps (b, not B). > And I let a client use 54M udp bandwidth(-b 54M) to send data to > another pc through router. But the result is only 13MBytes/sec. I noticed in the past that the order of the option matters for Iperf to take it into account or not. However, I find it surprising that you even get 13MBps, that is 104Mbps on a physical network theoretically limited to 11Mbps, not taking encapsulation into account. Are you sure you're using 802.11b rather than g (54Mbps, so it's not consistent with your results either) or more recent amendments. > Furthermore, I use "iwconfig wlan0 rate 1M" to set the client wireless > adapter rate. But the result of iperf is not be influenced by this > command. This would limit the 802.11 rate to 1Mbps, if the driver is compliant. Are you sure your traffic goes over the right interface? > Could anyone tell me how to let the iperf result reach to the 54M, > because the interference between two pc is not large through the > spectrum analyzer examination. Well, you should first make sure you now what you are dealing with precisely. Also know in what the units are. Bytes are 8 bits long. -- Olivier Mehani <sht...@ssji.net> PGP fingerprint: 4435 CF6A 7C8D DD9B E2DE F5F9 F012 A6E2 98C6 6655
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