Description: Cisco Enhanced Benes fabric MIB module.
This MIB module is used for managing/tracking the Ehanced
Benes Fabric entities and/or fabric related configuration,
state and statistics information.
The fabric entities relationship is shown as follows:


Acronyms and terms:
RP            - Routing processor.
DRP           - Distributed Route Processor.
LC            - Line card.
SFE           - switch fabric element.
SFE port      - the port of SFE contains a transmitter and/or
                receiver to transmit and/or receive data from
                backplane.
fabric link   - Fabric link.

+-+                                       +-+ 
|T1+=====================================>+R|
+-+   single fabric link                  +-+

A fabric link contains a transmitter T and receiver R.
The transmitter T is in the source SFE port of the fabric
link and the receiver R is in the destination SFE port
of the fabric link. 

OIM           -  Optical Interface Module.
fabric bundle - Fabric bundle is a cable that contains one 
                or more fabric links for transferring
                data between fabric cards.
+-+                                       +-+ 
|A+==================/====================+B|
+-+              1..N fabric links        +-+

A fabric bundle cable contains 1 to N fabric links.
One end of the fabric bundle cable is plugged into the fabric bundle
port A of fabric card in Line card rack and the other
end is plugged into the fabric bundle port B on a OIM            
of fabric rack for the high speed data transfer between fabric
bundle port A and B.

ingressq     - a switch fabric element which queues/segments
               packets into cells and sends them into fabric.
fabricq      - a switch fabric element which resequences and
               reassembles cells from fabric into packets and 
               forwarding them to the egress interface related
               hardware. 
fabric plane - Fabric plane is a path from a set of
               ingressqs in a RP/DRP or LC card to a set of fabricqs 
               in other RP/DRP or LC cards for transferring data
               between RP, DRP, and LC cards.