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.

Information represented by this MIB is passed by the
controller to those Cisco LWAPP APs, that can
operate in stand-alone mode.  

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 them to the controller to which
it is logically connected.

Central Controller ( CC )

The central entity that terminates the LWAPP protocol
tunnel from the LWAPP APs.  Throughout this MIB,
this entity is 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.

Native VLAN ID

A switch port and/or AP can be configured with a
'native VLAN ID'.  Untagged or priority-tagged
frames are implicitly associated with the native
VLAN ID.  The default native VLAN ID is '1' if
VLAN tagging is enabled.  The native VLAN ID is '0'
or 'no VLAN ID' if VLAN tagging is not enabled.

Remote Edge Access Point ( REAP )

The LWAPP AP that can also act as a stand-alone AP
when it loses communication with the controller
it was associated with.

When REAP can reach the controller (connected state),
it gets help from controller to complete client
authentication. When a controller is not reachable by
REAP, it goes into standalone state and does client
authentication by itself.  All data packets from
clients are either bridged locally (local-switch)
or forwarded to the controller (central-switch)
depending on the WLAN configuration.

Virtual LAN

VLAN defined in the IEEE 802.1Q VLAN standard
supports logically segmenting of LAN
infrastructure into different subnets or
workgroups so that packets are switched only
between ports within the same VLAN.

VLAN ID
Each VLAN is identified by a 12-bit 'VLAN ID'.
A VLAN ID of '0' is used to indicate 'no VLAN ID'.
Valid VLAN IDs range from '1' to '4095'. 

Home AP 
A REAP AP can be installed at end-user home. Home 
AP ethernet port will be connected to DSL or cable
modem at home. Home AP will be primed with Controller
IP Address so that it will join with controller.

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