This MIB is intended to be implemented on all those devices operating as Central Controllers (CC), that terminate the Light Weight Access Point Protocol tunnel from Cisco Light-weight LWAPP Access Points. Information provided by this MIB is used to manage AAA information on the controller. The relationship between CC and the LWAPP APs can be depicted as follows: +......+ +......+ +......+ + + + + + + + CC + + CC + + CC + + + + + + + +......+ +......+ +......+ .. . . .. . . . . . . . . . . . . . . . . . . +......+ +......+ +......+ +......+ + + + + + + + + + AP + + AP + + AP + + AP + + + + + + + + + +......+ +......+ +......+ +......+ . . . . . . . . . . . . . . . . . . . +......+ +......+ +......+ +......+ + + + + + + + + + MN + + MN + + MN + + MN + + + + + + + + + +......+ +......+ +......+ +......+ The LWAPP tunnel exists between the controller and the APs. The MNs communicate with the APs through the protocol defined by the 802.11 standard. LWAPP APs, upon bootup, discover and join one of the controllers and the controller pushes the configuration, that includes the WLAN parameters, to the LWAPP APs. The APs then encapsulate all the 802.11 frames from wireless clients inside LWAPP frames and forward the LWAPP frames to the controller. GLOSSARY Access Point ( AP ) An entity that contains an 802.11 medium access control ( MAC ) and physical layer ( PHY ) interface and provides access to the distribution services via the wireless medium for associated clients. LWAPP APs encapsulate all the 802.11 frames in LWAPP frames and sends them to the controller to which it is logically connected. Light Weight Access Point Protocol ( LWAPP ) This is a generic protocol that defines the communication between the Access Points and the Central Controller. Mobile Node ( MN ) A roaming 802.11 wireless device in a wireless network associated with an access point. Mobile Node and client are used interchangeably. Terminal Access Controller Access-Control System ( TACACS ) A remote authentication protocol that is used to communicate with an authentication server. TACACS allows a remote access server to communicate with an authentication server in order to determine if the user has access to the network. Remote Authentication Dial In User Service (RADIUS) It is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. It is intended to work in both local and roaming situations. Wireless LAN ( WLAN ) It is a wireless local area network, which is the linking of two or more computers without using wires. It uses radio communication to accomplish the same functionality of a wired LAN. PAP - Password Authentication Protocol CHAP - Challenge Handshake Authentication Protocol MD5-CHAP - Message Digest 5 Challenge Handshake Authentication Protocol LSC - Local Significant Certificate LSC can be used if we want our own public key infrastructure (PKI) to provide better security, to have control of our certificate authority (CA), and to define policies, restrictions, and usages on the generated certificates. REFERENCE [1] Wireless LAN Medium Access Control ( MAC ) and Physical Layer ( PHY ) Specifications [2] Draft-obara-capwap-lwapp-00.txt, IETF Light Weight Access Point Protocol