Restricting broadcast of a SSID from specific AP's

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May 14th, 2009

We are using AIR-LAP1131AG-A-K9 AP's Cisco's WCS and Wireless LAN controllers. We have a SSID which we do not want to be broadast from specific AP's.. How would one go about doing this?

I have this problem too.
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rob.huffman Thu, 05/14/2009 - 07:47

Hi Gerry,

The feature you are looking for is called WLAN Override in WLC 4.x versions.

Enabling WLAN Override

By default, access points transmit all defined WLANs on the controller. However, you can use the WLAN Override option to select which WLANs are transmitted and which ones are not on a per access point basis. For example, you can use WLAN override to control where in the network the guest WLAN is transmitted or you can use it to disable a specific WLAN in a certain area of the network.

From this doc;

Once you create a new WLAN, the WLAN > Edit page for the new WLAN appears. In this page you can define various parameters specific to this WLAN including General Policies, RADIUS Servers, Security Policies, and 802.1x Parameters.

**Check Admin Status under General Policies to enable the WLAN. If you want the AP to broadcast the SSID in its beacon frames, check Broadcast SSID.

Note: You can configure up to sixteen WLANs on the controller. The Cisco WLAN Solution can control up to sixteen WLANs for Lightweight APs. Each WLAN has a separate WLAN ID (1 through 16), a separate WLAN SSID (WLAN name), and can be assigned unique security policies. Lightweight APs broadcast all active Cisco WLAN Solution WLAN SSIDs and enforce the policies that you define for each WLAN.

From this good doc;

In 5.x versions you will use AP Groups, because in WLC 5.x versions, WLAN Override has been replaced with the "AP Groups" feature;

Creating Access Point Groups

After all access points have joined the controller, you can create up to 150 access point groups and assign up to 16 WLANs to each group. Each access point advertises only the enabled WLANs that belong to its access point group. The access point does not advertise disabled WLANs in its access point group or WLANs that belong to another group.

Hope this helps!


gginty Thu, 05/14/2009 - 10:07

Thanks for the swift response which did the trick!

b.julin Tue, 05/26/2009 - 07:31

The 5,2 changes... ugh.

I just got bit by this.

They don't port your existing wlan-override configuration over when you upgrade, so you end up with all your WLANs published everywhere,

and you can no longer selectively publish by radio frequency.

And why do we have to reboot APs every time we change the published WLANs? (was a problem in 4.x as well.) That makes changes very disruptive.

Starthorn Tue, 05/26/2009 - 08:47

I wondered why you have to reboot too. I tried it without rebooting and it still seemed to work.

b.julin Tue, 05/26/2009 - 10:36

Yeah I noticed that today. Weird.

I think I'll leave some unbooted and see if anything goes all floppy.


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