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Cisco WLC slow performance

Unanswered Question
Apr 30th, 2014
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Hi im having trouble with Lan speeds, the network consists of one cisco 887 router a Cisco 2504 WLC and 7 1600 series CAP access points.

i have tested today with just the Router connected to the Lan controller and the ap powered from the Lan controller, so there are no other devices connected, i have also created a new SSId and disabled the SSID that was in production, i have 1 registered connection in the lan controller summary.

i have run numerous iperf to a local iperf server test and am getting a max of 16mb, the wireless network is WPA 2 aes and i have a wireless connection speed of 144Mb.

can anyone give me some advice as to what may be the problem, Oh and i have tried different access point and cat 5 cables just in case.

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Rasika Nayanajith Wed, 04/30/2014 - 11:59
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Hi Nick,

Post below output from your WLC while your client connected & getting this performance.

(WLC) >show client detail <MAC addr>

Also if possible do a iperf test while iperf server is another wireless client connected the same AP as iperf client.



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Nick Canacott Fri, 05/02/2014 - 02:10
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Hi All

i managed to fix the problem, QOS of the WLAN was set incorrectly, now im getting 70MBPS through iperf.


thank you for your time.

CableWiFi Fri, 05/02/2014 - 04:06
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Would you please share with us the QOS values you changed. Sounds like a good learning oppt.


Leo Laohoo Thu, 05/01/2014 - 15:40
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How is this "local iperf server" connected?  Is it connected to the router? 


Can you try connecting two wireless clients to the SSID and do an iPerf test over wireless?


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