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Layer 2 and Layer 3 Network Operation

The access points support Layer 2 or Layer 3 network operation. In Layer 2 configurations, the access

point and the controller are on the same subnet and communicate with encapsulated Ethernet frames

using MAC addresses rather than IP addresses. Layer 2 configurations are typically not scalable into

larger networks. Additionally, Layer 2 operation is supported only by the Cisco 4400 series controllers.

Access points and controllers in Layer 3 configurations use IP addresses and UDP packets, which can

be routed through large networks. Layer 3 operation is scalable and recommended by Cisco.

Figure 6 illustrates a typical Layer-3 wireless network configuration containing access points and a

controller.

Figure 6

Overview

Typical Layer 3 Access Point Network Configuration Example

LWAPP

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