Persistent Channel 13 Dynamic Channel Assigment (DCA)

wirelessman · ‎03-10-2014

Dear WiFi Experts,

Why is AP still choosing channel 13 when Dynamic Channel Assigment is enabled and channels 1,6,11 are the only channels selected/checked in the DCA list?

Can't the AP choose only 1, 6, and 11 and nothing more?

WLC country code is set to SA (Saudi Arabia).

WLC code 7.0.98

Sandeep Choudhary · ‎03-10-2014

HI ,

It chooes the best channel.

Just info:

Here is the list of channels (and frequencies) of the ISM (industrial, scientific and medical band) (2.4 GHz) used in the WiFi technology:

Channel 1: 2.412 MHz
Channel 2: 2.417 MHz
Channel 3: 2.422 Mhz
Channel 4: 2.427 Mhz
Channel 5: 2.432 Mhz
Channel 6: 2.437 Mhz
Channel 7: 2.442 Mhz
Channel 8: 2.447 Mhz
Channel 9: 2.452 Mhz
Channel 10: 2.457 MHz
Channel 11: 2.462 MHz
Channel 12: 2.467 MHz
Channel 13: 2.472 MHz
Channel 14: 2.484 MHz

If you want then you can manually change Channle per AP:

Here is the process:

1. Login WLC GUI

2. Go to Wireless > Access Points > 802.11a/802.11b then on far right side of AP from drop dpwn menu click on configure.

Under RF channel assignment you can change the channle manually.

Regards

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wirelessman · ‎03-10-2014

thanks for your reply, Sandeepchoudhary21!

But why is it choosing channel 13 when it is not checked as one of the channels to choose from.

1,6 and 11 are the only channels selected on the DCA list.

but some AP's still chooses channel 13. and when that happens, clients, which do not recognize channel 13, are unable to access the wlan.

The AP is having the part number AIR-LAP1131AG-E-K9 and the controller is set to SA as country code.

flychik0178 · ‎11-02-2016

Good day!

Do You resolve this problem? I have the same issue. I have WLC 5508 + AP 1552. Sometime some APs set 13 channel though all clients doesn't support it. Just 1,6,11 channels are selected on the DCA list. To change 13 channel I need to reset it manually on every AP. It is bad deсision