This MIB is intended to be implemented on all those
devices operating as Central controllers, that
terminate the Light Weight Access Point Protocol
tunnel from Cisco Light-weight LWAPP Access Points.
Information provided by this MIB is about the
configuration and monitoring of 802.11 wireless
clients in the network.
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.
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,
Mobile Station(Ms) and client are used
interchangeably.
Signal to Noise Ratio ( SNR )
-----------------------------
It is a measure used in science and engineering
that compares the level of a desired signal to
the level of background noise. It is defined as
the ratio of signal power to the noise power.
A ratio higher than 1:1 indicates more signal than
noise. While SNR is commonly quoted for electrical
signals, it can be applied to any form of signal.
Received Signal Strength Indicator ( RSSI )
-------------------------------------------
It is a measurement of the power present in a
received radio signal.
Radio Frequency Identification ( RFID )
-------------------------------------------
It is a technology that uses radio waves to transfer data
from an electronic tag, called RFID tag or label, attached
to an object, through a reader for the purpose of identifying
and tracking the object.
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
