The MIB module which describes the features
supported in MGX82XX products.
This MIB Module provides the features supported
in Controller Cards in MGX8250 and MGX8220.

Terminologies used:

PXM : Processor Switch Module. This is controller
      card in MGX8250.
ASC : AXIS Shelf Controller. This is controller
      card in MGX8220.
VSI : Virtual Switch Interface, a hardware-independent 
      switch control protocol. This allows a Switch to be
      controlled by a multiple controllers such as PNNI, MPLS.
      These control planes can be internal or external to the
      switch.The VSI interface defines the messages and associated
      functions which allow communication between the controller
      and the switch.This interface is expected to support all
      types of connections (voice,data,frame relay,ATM) for PVCs,
      SPVCs and SVCs.

 Controller - Software ( and possibly hardware) which manages
              topology and network resources and performs VSI 
              Master function. This performs source routing 
              for end-to-end SVCs, including general call 
              acceptance GCAC,setup calls with other controllers.
              PNNI and MPLS are examples of controllers.