Aironet 1250 channel bonding - config 802.11a chan_width

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Jan 17th, 2008
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Hi ,

I tried to bond two 20MHz channels on a 1250 (802.11A - LWAPP - 12.4(10b)JA) but get the following error:

' Slot is not Disabled or Customize is not enabled'

I have disabled the 802.11network/ radios etcetc but no luck yet.



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Overall Rating: 5 (2 ratings)
irisrios Wed, 01/23/2008 - 09:44
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You can not club to channels for usage with wireless network. You only have an option to add a channel available to be allocated. You use the command config 802.11 channel ap for this purpose.

fielderj Wed, 04/09/2008 - 11:35
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I am having the same issue while in LWAP mode.

According to this document:

40mhz is supported on WLC's, it even gives steps on how to enable it, but I am receiving the same error as the original poster.

I was able to successfully deploy 802.11n @ 40mhz in autonomous mode, but the operation fails in LWAP mode.

I am going to open a TAC case to see if this is a bug.


Scott Fella Wed, 04/09/2008 - 14:51
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You have to set the channel first then change the channel width. You might have to set the power also...

If you want to set above 40MHz use these channels: 36,44,52,60,100,108,116,132,149.157

If you want to set below 40MHz use these channels: 40,48,56,64,104,112,136,153,161

Hope this helps.

edward_bacon Wed, 11/12/2014 - 09:45
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Hi Jeremy, I see your post is very old but I wanted to reply in case Cisco TAC was able to solve your issue and ask if you know of a way to set the Channel Width with Templates or CLI.




Rasika Nayanajith Wed, 11/12/2014 - 11:37
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Hi Ed,

Did you try something like below. Replace your AP name with LAP1 below.

(5508-1) >config 802.11a disable LAP1
(5508-1) >config 802.11a chan_width LAP1 40 
(5508-1) >config 802.11a enable LAP1

(5508-1) >save config 

Are you sure you want to save? (y/n) y




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edward_bacon Wed, 11/12/2014 - 12:25
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The AP I was testing was on the wrong channel for 40mhz width. 



Abhishek Abhishek Tue, 11/18/2014 - 18:08
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I am sorry to say that you cannot mix the channel 20MHz channels on a 1250 (802.11A - LWAPP - 12.4(10b)JA)

gohussai Mon, 07/06/2015 - 12:59
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Yes i tested.


Try this from Controller console.


First disable the 802.11a then mention the below commands for your LAP.


config 802.11a chan_width LAP1 40 

config 802.11a enable LAP1

save config 


hope this will work.


Note: If problem persist ,reimage the lap and try again.



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