[Soekris] net4521 and 802.11a performance

krishna krishna at cs.ucsb.edu
Tue Dec 13 16:47:16 UTC 2005


>> please correct me if i am wrong, I would be really happy if  
>> somebody  can show me how to make things as fast as 108 mbit/sec  
>> on a soekris.
>
> Coming from a real-life standpoint, you're never going to get  
> 108mbit/sec from 802.11a.  Just like 802.11b only has about 6Mb of  
> usable bandwidth, 802.11a is only realistically ever going to get  
> at most 35Mb.  There is so much overhead in the protocol that you  
> can't help it, not to mention that the advertised speed of the  
> given standard (11, 54, etc) _is_ the top speed - you're not going  
> to get "108" with "full duplex".  These monkeys that advertise  
> "108" speeds are actually usually using two channels and trying to  
> approximate "duplex".

Yet, about 10 MBits/sec is far too low. I used pebble for my testing.  
In fact, yesterday I was able to get 40 MBits/sec consistently with a  
second laptop. The bit rate in all my tests is 54M fixed.

>
> Anyone is welcome to prove me wrong, but this is from 2.5 years'  
> experience with commercial-grade equipment in the largest retail  
> environment in the world.
>
> RB
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