Connectivity between ap and WLC

Unanswered Question
Apr 18th, 2009


I am new in Cisco Wireless network. I am going to install 4 AP in the Office and One Integeted Wireless Controller in my 3825 router. How does AP and Controller connectivity? Please help me out in this issue.

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Overall Rating: 4 (1 ratings)
Scott Fella Sat, 04/18/2009 - 08:56

The communication between the wlc and lap is initially between the lap and the management interface of the wlc. When the lap joins the wlc, then the communication is between the lap and the ap-manager interface. Both the management and ap-manager interface should be on the same subnet. Here is a link that should walk you through setting up your device:

goutam_04 Sat, 04/18/2009 - 09:10

Thanks for your help.

I have cleared this connectivity. but in my network the Controller is integrated on Router, where in Controller one distributed port is there, how do I connect that one.

Can you plese give me that type of physical diagram and details, where the Controller is integrated with Router. Wireless as wel as wired users are there in the same LAN.

Scott Fella Sat, 04/18/2009 - 09:17

Take a look at the doc. Basically they are showing you logically how it is connected. They show the router and the wlc seperate just to give you an idea. Yes there is only one port, but you logically configure others to seperate you users from management. Sub-interfaces are created on the router to aloow the tagging of vlans from the wlc to the switch.

Here is another link that may help:

goutam_04 Sat, 04/18/2009 - 09:22

Where do I connect that distributed port? to connect all the LAP do I need to installed different Switch to Router? Physically how AP will be connected to Controller?

Scott Fella Sat, 04/18/2009 - 10:01

Yes you need a switch unless you have a switch module inbrhe router. This is where the ap's will connect.

goutam_04 Mon, 04/20/2009 - 07:49

Hi can you tell the physical location of the AP and WLC, is this must that would be in same network or between AP and WLC there can be 1 or more hop gap?

Scott Fella Mon, 04/20/2009 - 08:14

You can have L3 hops between the ap and the wlc... as long as you are not blocking upd 12222 or 12223. This would be the same setup if you had L3 connections from your closet to your core.

goutam_04 Mon, 04/20/2009 - 22:54

I have come to know that, NAC must be install in the same segment where WLC is to be installe. is it?

Or it can be install in different network or segment NAC and WLC. Do you have the configuration for NAC and whats the command would be in Switch.

gamccall Tue, 04/21/2009 - 05:22

With NAC 4.5 and WLC 5.1 release, the wireless NAC solution supports Out Of Band integration with NAC appliance. With earlier versions, NAC must be in-band.

goutam_04 Tue, 04/21/2009 - 05:33

You mean to say that I can install NAC in different Segment from the Segment where the WLC exist.

goutam_04 Tue, 04/21/2009 - 06:25

Thanks for your reply. Can we do it the same in different WAN Segment. I mean to say that. with my central office there are 3 circle office connected via Serial link. I have installed WLC in all the circle offices for wireless users but I would like installed NAC centrally in Central office for all Users. I dont want to install NAC in every Circle office. Is it possible.

gamccall Tue, 04/21/2009 - 06:59

"Cisco Wireless LAN Controllers must be Layer 2 adjacent to the Clean Access Server(s) with which they interoperate to support wireless client login."

Good catch. My mistake.

goutam_04 Tue, 04/21/2009 - 07:01

thanks....anyhow its not possible to install in different WAN the point..

thanks again


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