How to configure the Lightweight Access Point in order to join the respective Wireless LAN Controller

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Jun 17, 2009 10:10 PM
Jun 17th, 2009


Introduction

How to configure the Lightweight Access Point in order to join the respective Wireless LAN Controller

Resolution

Priming is a process by which the Lightweight  Access Point (LWAP) can be configured to associate to the respective Wireless LAN Controller (WLC). Priming can be done with the use of CLI commands or GUI configuration.

These are the steps to configure Priming in LWAP. Before you configure the access point, make sure that the access point discovers the Controller.

The different methods by which the access point (AP) discovers the controller are:

  1. The AP issues a DHCP DISCOVER in order to obtain an address.

  2. Layer 2 attempts LWAPP WLAN controller discovery and Ethernet broadcast.

  3. Layer 3 attempts LWAPP WLAN controller discovery : 
           
    • LWAPP discovery broadcast on local subnet
                   
      • ip helper-address

      • ip forward-protocol udp 12223
             
    • Over-the-air provisioning

    • Locally stored controller IP address(IP addresses of the controller learned from previously joined mobility group )

    • DHCP option 43

    • DNS resolution of CISCO-LWAPP-CONTROLLER.localdomain

       
  4. Once the APs join the controller, the primary, secondary and tertiary controllers of the AP can be manually configured to join upon the next bootup, through the Command Line Interface (CLI) on the controller, as shown:

WLC>config ap primary-base [Switch name] [Cisco AP]

WLC>config ap secondary-base [Switch name] [Cisco AP]

WLC>config ap tertiary-base [Switch name] [Cisco AP]

WLC>save config

Note: Switch name refers to the primary, secondary and tertiary controller names.

After the configuration is saved, issue the WLC> config ap reset command in order to clear the AP from the CLI. Upon reboot, the AP joins the primary-base controller that is configured for that AP.

GUI Configuration

From the GUI, click the Wireless tab in the menu at the top of the window, select the AP from the list of APs that are registered to the WLC, and clickDetail beside the AP.

The All APs > Details window appears.

wlc_failover-7.gif

In this window, define the primary, secondary, and tertiary controllers.

Note: Define only system names under the primary, secondary, and tertiary controller name fields. Do not enter the IP address or the MAC address of the controller in these fields.

Note: This example does not add a tertiary controller name because there are only two controllers.


Products


Access point

Wireless LAN Controllers

Reference Links



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Comments

justin_barnes Wed, 04/06/2011 - 00:35

or you could just plug the AP in, console into it, and enter in the command: lwapp ap controller ip address

<xxx.xxx.xxx.xxx> that normally saves a lot of headache, so long as the infrastucture is set up correctly

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