Explanation/Reference:
Section: Considerations for Expanding an Existing Network Explanation
Explanation:
Lightweight Access Point Protocol (LWAPP) uses User Datagram Protocol (UDP) port 12222 for data traffic and UDP port 12223 for control traffic. LWAPP is a protocol developed by Cisco and is used as part of the Cisco Unified Wireless Network architecture. LWAPP creates a tunnel between a lightweight access point (LAP) and a wireless LAN controller (WLC)? in LWAPP operations, both a LAP and a WLC are required. The WLC handles many of the management functions for the link, such as user authentication and security policy management, whereas the LAP handles real-time operations, such as sending and receiving 802.11 frames, wireless encryption, access point (AP) beacons, and probe messages. Cisco WLC devices prior to software version 5.2 use LWAPP.
Control and Provisioning of Wireless Access Points (CAPWAP) uses UDP port 5246 for control traffic and UDP port 5247 for data traffic. CAPWAP is a standards-based version of LWAPP. Cisco WLC devices that run software version 5.2 and later use CAPWAP instead of LWAPP.
Neither LWAPP nor CAPWAP use Transmission Control Protocol (TCP) for communication. TCP is a connection-oriented protocol. Because UDP is a connectionless protocol, it does not have the additional connection overhead that TCP has? therefore, UDP is faster but less reliable.
Reference:
Cisco: LWAPP Traffic Study
IETF: RFC 5415: Control And Provisioning of Wireless Access Points (CAPWAP) Protocol Specification