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 spectrum intelligence
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.
        
Spectrum Intelligence (SI) 
        
Radio frequency (RF) interference from devices 
operating in the unlicensed 2.4-GHz and 5-GHz
bands used by wireless LANs (WLANs) is a growing 
concern for organizations deploying indoor and outdoor 
wireless networks. A variety of RF devices are now 
available that can cause interference, including
cordless phones,Bluetooth devices, cameras, paging
systems,unauthorized access points, and clients in
ad-hoc mode.
        
Left unaddressed, RF interference can result in low
data rates and throughput, lack of sufficient WLAN
coverage, WLAN performance degradation, poor voice
quality, and low end-user satisfaction. This in
turn, can lead to decreased network capacity, an
increase in support calls, network downtime,rising
operational costs, and potential security
vulnerabilities from malicious interference.
        
Spectrum Intelligence, industry-leading solution from
Cisco detects, classifies, and locates devices causing
RF interference in the unlicensed 2.4-GHz and 5-GHz
bands.When the source of the interference is determined,
customers can remove, move, shield, adjust, or replace
the interference source. This helps organizations 
troubleshoot the wireless network to determine the
root causes of interference problems and optimize 
network performance.
        
Sensord
        
The Sensord software looks at the timing and frequency 
of interference bursts, and the discovered attributes
of the bursts such as the modulation type and identified
sync words.This high-level information is then used to
perform the final identification and separation of one
device from another.This final classification step
provides the powerful features of SI: Identifying the
specific source of the interference, where it is
located, and how it can be mitigated.
        
Persistent Device Propagation
        
Interference devices usually affect multiple wireless
access points.Using persistent device propagation
information regarding persistent interference devices
can be passed from one access point to another access
point effectively improving radio resource management.
        
Radio Resource Management ( RRM )
        
RRM is the system level control of co-channel 
interference and other radio transmission 
characteristics in wireless communication systems. 
        
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.