1141N Access Point

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Apr 13th, 2010
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Can you shed light on this issue?

Hi I have an 1141 AP, single-band radio.


A client has existing 11g and 11n wireless users. His concern was to have the AP run on 11n mode.

My understanding on this is when you have an 11g and 11n users on the same AP, the AP radio operates at 11g mode to cater both the 11n and 11g users. To run the AP in 11n mode, you have to evade the 11g users from connecting the AP. If I have to set the AP in 11n mode only, 11g users can't connect to the AP.

Am I right?

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rdvorak Tue, 04/13/2010 - 07:16
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if you disable backward compatibility (=protection mode) then only 802.11n clients could connect, if you have it enabled also 802.11g stations could connnect.

The online downside is that the 802.11g need more time to tx a frame (because of the lower speed) so they use/block the air longer which result in a lower thruput of the 802.11n clients.

You could read a little bit more here http://en.wikipedia.org/wiki/IEEE_802.11n-2009

...or here the Cisco 802.11n Design and Deployment Guidelines in section --> "Coexistence in an 802.11a/b/g/n Network" -->


Have a great day,



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