sctp cmt problem:using two wireless cards the speed is lower than using one wireless cards

Julian Elischer julian at freebsd.org
Wed Sep 14 17:03:17 UTC 2011


On 9/14/11 5:56 AM, jyl_2006 wrote:
> Before testing cmt in wlan,we also turn on sysctl states by setting
> sysctl net.inet.sctp.cmt_pf=1
> sysctl net.inet.sctp.cmt_use_dac=1
> sysctl net.inet.sctp.cmt_on_off=1
>
> My Os is Freebsd8.2, I write a simple tarball  to send data ,  and get data
> from wireshark .
> The result shows that both two path have data , but the time of two path is
> much higher than one path.
>
> Can anyone point out something we did wrong or steps we missed?
> Thanks in advance.

are they on the same band?
if so then they may be interfering with each other, leading a great 
reduction in throughput on BOTH cards.

(radio interference, not software)


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