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Cisco Wireless LAN Solution Product Guide
OL-7955-01
Chapter 1 Overview
Cisco Wireless LAN Controllers
Note Cisco recommends that you assign one set of VLANs for wireless LANs and a different set of VLANs
for Management Interfaces to ensure that controllers properly route VLAN traffic.
The Management Interface is assigned to one physical port through which it communicates with other
network devices and other access points. However, the Management Interface can also communicate
through all other physical ports except the service port as follows:
• Sends messages through the Layer 2 network to autodiscover and communicate with other Cisco
Wireless LAN Controllers through all physical ports except the service port.
• Listens across the Layer 2 network for Cisco 1000 series lightweight access point LWAPP polling
messages to autodiscover, associate with, and communicate with as many Cisco 1000 series
lightweight access points as it can.
Note When a controller fails its dropped lightweight access points poll the network for another controller.
When an online controller has any remaining lightweight access point ports, the Management Interface
listens to the network for lightweight access point polling messages to autodiscover, associate with, and
communicate with as many lightweight access points as it can. Refer to the “Cisco Wireless LAN
Controller Failover Protection” section on page 1-27 for more information.
Note The Management Interface cannot be assigned to the dedicated controller service port.
The Management Interface uses the burned-in Cisco Wireless LAN Controller Distribution System MAC
address, and must be configured for the following:
• VLAN assignment.
• Fixed IP Address, IP netmask, and default gateway.
• Physical port assignment.
• Primary and Secondary DHCP Servers.
• Access Control List, if required.
Refer to the “Verifying and Changing the Management Interfaces” section on page 7-2 for configuration
instructions.
AP-Manager Interface
The logical AP-Manager Interface controls Layer 3 communications between Cisco Wireless LAN
Controller and lightweight access points.
The AP-Manager Interface is assigned to one physical port and can be on the same subnet and physical
port as the management interface. The AP-Manager Interface can communicate through any physical
port except the service port as follows:
• Sends Layer 3 messages through the network to autodiscover and communicate with other Cisco
Wireless LAN Controllers.
• Listens across the network for Layer 3 lightweight access point LWAPP polling messages to
autodiscover, associate with, and communicate with as many lightweight access points as it can.
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