Cisco® wireless LAN controllers are ideal for enterprise wireless LAN deployments and provide system-wide wireless LAN functions, such as
security policies, intrusion prevention, RF management, quality of service (QoS), and mobility. They work in conjunction with Cisco 1000 Series
lightweight access points and Cisco Wireless Control System (WCS) Software to support business-critical wireless applications. From voice and data
services to location tracking, WLAN controllers provide the control, scalability, and reliability that IT managers need to build secure, enterprise-scale
wireless networks—from branch offices to main campuses.
Cisco wireless LAN controllers smoothly integrate into existing enterprise networks. They communicate with Cisco 1000 Series lightweight access
points over any Layer 2 (Ethernet) or Layer 3 (IP) infrastructure using the Lightweight Access Point Protocol (LWAPP) (Figure 2). This emerging
IETF standard helps ensure that communication between access points and wireless LAN controllers remains secure, and it enables important
wireless LAN configuration and management functions to be completely automated for cost-effective wireless LAN operations.