[Madwifi-devel] multiple wireless cards

[emilio a. <emi...@ii...>]

Hi there,

I have a problem using 2 Atheros based wireless cards at the same time.
Secifically, when each card works alone the driver works fine. However, 
when both cards work simultaneously, the per flow throughput of each 
cards is reduce of about 30-40%, even if the two wireless cards use 
different channels (1 and 11).
My testbed consisted of a soekris 4801 with 2 R52H High Power Mikrotik 
802.11a/b/g mPCI adapter runnig the madwifi 0.9.4 and the linux kernel 
2.6.22.
To see the throughput reduction I opened two outgoing asimptotic UDP 
flows (using the iperf tool) between the soekris board and two laptop.
The two wireless cards worked in ad-hoc mode and I used 54Mbps as the 
wireless transmission rate (I disable the autorate alghoritm).

Has anyone experienced the same problem?

I would be really grateful if anyone shared his experience relative to
my question.

Regards,
Emilio Ancillotti