Cisco Wireless LAN Controller Configuration Guide, Release 7.4
Configuring the AP-Manager Interface
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Configuring the AP-Manager Interface

Configuring the AP-Manager Interface

Information the About AP-Manager Interface

A controller has one or more AP-manager interfaces, which are used for all Layer 3 communications between the controller and lightweight access points after the access points have joined the controller. The AP-manager IP address is used as the tunnel source for CAPWAP packets from the controller to the access point and as the destination for CAPWAP packets from the access point to the controller.


Note


The controller does not support transmitting the jumbo frames. To avoid having the controller transmit CAPWAP packets to the AP that will necessitate fragmentation and reassembly, reduce MTU/MSS on the client side.


The AP-manager interface communicates through any distribution system port by listening across the Layer 3 network for access point CAPWAP or LWAPP join messages to associate and communicate with as many lightweight access points as possible.

Restrictions for Configuring AP Manager Interfaces

  • The MAC address of the management interface and the AP-manager interface is the same as the base LAG MAC address.
  • If only one distribution system port can be used, you should use distribution system port 1.
  • An AP-manager interface is not required to be configured. The management interface acts like an AP-manager interface by default, and the access points can join on this interface.
  • If link aggregation (LAG) is enabled, there can be only one AP-manager interface. But when LAG is disabled, one or more AP-manager interfaces can be created, generally one per physical port.
  • Port redundancy for the AP-manager interface is not supported. You cannot map the AP-manager interface to a backup port.

Configuring the AP-Manager Interface (GUI)


    Step 1   Choose Controller > Interfaces to open the Interfaces page.
    Step 2   Click AP-Manager Interface.

    The Interface > Edit page appears.

    Step 3   Set the AP-Manager Interface parameters:
    Note   

    For Cisco 5500 Series Controllers, you are not required to configure an AP-manager interface. The management interface acts like an AP-manager interface by default.

    • Physical port assignment
    • VLAN identifier
      Note   

      Enter 0 for an untagged VLAN or a nonzero value for a tagged VLAN. We recommend using tagged VLANs for the AP-manager interface.

    • Fixed IP address, IP netmask, and default gateway
    • Primary and secondary DHCP servers
    • Access control list (ACL) name, if required
    Step 4   Click Save Configuration to save your changes.
    Step 5   If you made any changes to the management or virtual interface, reboot the controller so that your changes take effect.

    Configuring the AP Manager Interface (CLI)

    Before You Begin

    For Cisco 5500 Series Controllers, you are not required to configure an AP-manager interface. The management interface acts like an AP-manager interface by default.


      Step 1   Enter the show interface summary command to view the current interfaces.
      Note   

      If the system is operating in Layer 2 mode, the AP-manager interface is not listed.

      Step 2   Enter the show interface detailed ap-manager command to view the current AP-manager interface settings.
      Step 3   Enter the config wlan disable wlan-number command to disable each WLAN that uses the AP-manager interface for distribution system communication.
      Step 4   Enter these commands to define the AP-manager interface:
      • config interface address ap-manager ip-addr ip-netmask gateway
      • config interface vlan ap-manager {vlan-id | 0}
        Note   

        Enter 0 for an untagged VLAN or a nonzero value for a tagged VLAN. We recommend using tagged VLANs for the AP-manager interface.

      • config interface port ap-manager physical-ds-port-number
      • config interface dhcp ap-manager ip-address-of-primary-dhcp-server [ip-address-of-secondary-dhcp-server]
      • config interface acl ap-manager access-control-list-name
      Step 5   Enter the save config command to save your changes.
      Step 6   Enter the show interface detailed ap-manager command to verify that your changes have been saved.

      Configuration Example: Configuring AP-Manager on a Cisco 5500 Series Controller

      For a Cisco 5500 Series Controller, we recommend that you have eight dynamic AP-manager interfaces and associate them to the eight Gigabit ports of the controller when LAG is not used. If you are using the management interface, which acts like an AP-manager interface by default, you must create only seven more dynamic AP-manager interfaces and associate them to the remaining seven Gigabit ports.

      Figure 1. Dynamic Interface Example with Dynamic AP Management. This figure shows a dynamic interface that is enabled as a dynamic AP-manager interface and associated to port number 2.

      Figure 2. Cisco 5500 Series Controller Interface Configuration Example. This figure shows a Cisco 5500 Series Controller with LAG disabled, the management interface used as one dynamic AP-manager interface, and seven additional dynamic AP-manager interfaces, each mapped to a different Gigabit port.