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AP Automatically disables 'n'

Hi all,

Some of 'n' supported ap`s (3500 & 3600) registered to 5508 wlc, automatically shows down for 5Ghz and only b/g is up. Code of wlc is

What could be the reason..?

VIP Purple

Re: AP Automatically disables 'n'

HI Viajy,

Can you check this:

802.11a is enabled or not?


Ensuring 802.11n Rates are Enabled

Step 1 Under the `Wireless' tab on the controller GUI, click on the `802.11a/n' or `802.11b/g/n' network setting.

Step 2 Click `High Throughput (802.11n)' to open the configuration page.

Step 3 Ensure that `11n Mode' is enabled. By default, all of the MCS (or 802.11n data rates) are enabled.


Enable the 802.11n support on the 802.11a network.

(Cisco Controller)>config 802.11a 11nsupport enable

If its not then enable it.


Hall of Fame Super Silver

AP Automatically disables 'n'

If not all AP's experience this, it can be a bug.. I have seen this in the past and see it also on v7.6 with 1142's and 2602's.  I would have to disable the access points radio and then enable it again to see the radio up.  Like on your other post, its best to go with of  I have noticed also that changes to the wlan will cause the radios to disable... not all, but a few and I would have to disable and enable the radios again. 



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Hall of Fame Super Silver

Re: AP Automatically disables 'n'

Let me correct what I posted. It's v7.4.110.0 that we are seeing this with 1142's and 2602's, mainly 2602's.

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