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pass4sure cisco dumps.Step 2 At the AP, the AP adds a LWAPP header with the C bits set to 0 to the frame, and then encapsulates this LWAPP header along with the 802.11 frame in a UDP packet for IP-based transmission. This source IP address is the address of the AP's IP and the destination IP address is the AP Manager address of the WLC. This source UDP port is a temporary port based on a hash of the APMAC address. The destination UDP port is 12222.Step 3 The IP packet is encapsulated in the Ethernet as it leaves the AP and is then transmitted through the switching and routing network to the WLC.Step 4 On the WLC, the Ethernet, IP, UDP, and LWAPP headers are removed from the original 802.11 frame. Step 5 After processing the 802.11MAC header, the WLC extracts the payload (IP packets from host A), encapsulates itinto an Ethernet frame, then typically adds an 802.1qVLAN tag and forwards it to the appropriate wiredto the appropriate wired network. Step 6 The packet is then transmitted over the wired switching and routing network to Host B. When Host B receives the packet, Host B is likely to respond, so the process is reversed as follows. Step 1 The packet is transmitted over the wireline switching and routing network to the WLC, where the arriving Ethernet frame uses the MAC address of Host A as the destination MAC address.MAC address as the destination MAC address. Step 2 The WLC removes the Ethernet header and extracts the payload (the IP packet destined for Host A). Step 3 The original IP packet from Host A is encapsulated with a C-bit location. of the LWAPP header is encapsulated together.149 Chapter 11 Discovering and Associating Controllersand then delivers it in UDP packet format over the IP network to the APO The packet uses the WLCAP manager's IP address as the source IP address and the AP's IP address as the destination address. The source UDP port is 12222, and the destination UDP port is a temporary port from the APMAC address hash. Step 4 This packet is delivered to AP0 via the switching and routing networkStep 5 The AP removes the Ethernet, IP, UDP, and LWAPP headers and extracts the payload, which is then encapsulated in an 802.11 frame and transmitted to Host A over the RF network. For Layer 3 LWAPP, the MTU (Maximum TransmissionUnit) is assumed to be 1500 bytes. The default value for this value is 1500 bytes, but can be modified.11.2.2 How the LWAPPAP discovers a controllerWhen an AP discovers and joins a controller, that AP goes through several states. In Figure 11.2, you can see these states and when they occur.