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 Light-weight LWAPP Access Points.

This MIB provides configuration and status information
about the 802.11 Access Points that have joined the
controller.                 

The relationship between CC and the LWAPP APs
can be depicted as follows:

+......+     +......+     +......+           +......+
+      +     +      +     +      +           +      +
+  CC  +     +  CC  +     +  CC  +           +  CC  +
+      +     +      +     +      +           +      +
+......+     +......+     +......+           +......+
..            .             .                 .
..            .             .                 .
.  .            .             .                 .
.    .            .             .                 .
.      .            .             .                 .
.        .            .             .                 .
+......+ +......+     +......+      +......+          +......+
+      + +      +     +      +      +      +          +      +
+  AP  + +  AP  +     +  AP  +      +  AP  +          +  AP  +
+      + +      +     +      +      +      +          +      +
+......+ +......+     +......+      +......+          +......+
.              .             .                 .
.  .              .             .                 .
.    .              .             .                 .
.      .              .             .                 .
.        .              .             .                 .
+......+ +......+     +......+      +......+          +......+
+      + +      +     +      +      +      +          +      +
+  MN  + +  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 it to the controller to which
it is logically connected.

Basic Service Set Identifier (BSSID)

The identifier for the service set comprising of
all the 802.11 stations under the control of
one coordinating Access Point.  This identifier
happens to be the MAC address of the dot11 radio
interface of the Access Point.  The wireless
clients that associate with the Access Point
get the wired uplink through this particular 
dot11 interface. 

Central Controller ( CC )

The central entity that terminates the LWAPP protocol
tunnel from the LWAPP APs.  Throughout this MIB,
this entity also referred to as 'controller'. 

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. 

Station Management (SMT)

This term refers to the internal management of the
802.11 protocol operations by the AP to work
cooperatively with the other APs and 802.11
devices in the network.

Link Latency 

Latency is round trip time between AP and controller.
There is a continuous heart-beat between AP and 
controller. AP calculates latency for each time and 
sends to controller.
	
	AMSDU
	
	Aggregate MAC Service Data Unit. A structure containing 
	multiple MSDUs, transported within a single (unfragmented)  
	or multiple (fragmented) Data MPDU. 

DTLS

Datagram Transport Layer Security (DTLS) protocol provides 
communications privacy for datagram protocols. The protocol 
allows client/server applications to communicate in a way 
that is designed to prevent eavesdropping, tampering, or 
message forgery. 

WIPS

Wireless Intrusion Prevention System (WIPS) is a network device 
that monitors the radio spectrum for the presence of 
unauthorized access points (intrusion detection), and can 
automatically take countermeasures (intrusion prevention).

SE

Spectrum Expert is an application software, which when 
connected to Spectrum Intelligent Access Point, provides 
detailed RF spectrum plots and data, and assist in diagnosing 
network problems. 

PPPOE

Point-to-Point Protocol Over Ethernet provides a standard method 
to build sessions for transporting multi-protocol datagrams between 
point-to-point links over Ethernet.

REFERENCE

[1] Part 11 Wireless LAN Medium Access Control ( MAC )
and Physical Layer ( PHY ) Specifications.

[2] Draft-obara-capwap-lwapp-00.txt, IETF Light 
Weight Access Point Protocol.