RFC 2020 (rfc2020) - Page 2 of 31

IEEE 802

RFC 2020               IEEE 802.12 Interface MIB            October 1996


2.  Object Definitions

   Management information is viewed as a collection of managed objects,
   residing in a virtual information store, termed the Management
   Information Base (MIB).  Collections of related objects are defined
   in MIB modules.  MIB modules are written using a subset of Abstract
   Syntax Notation One (ASN.1) [1] termed the Structure of Management
   Information (SMI) [2].  In particular, each object type is named by
   an OBJECT IDENTIFIER, an administratively assigned name.  The object
   type together with an object instance serves to uniquely identify a
   specific instantiation of the object.  For human convenience, we
   often use a textual string, termed the descriptor, to refer to the
   object type.

3.  Overview

   Instances of these object types represent attributes of an interface
   to an IEEE 802.12 communications medium.  At present, IEEE 802.12
   media are identified by one value of the ifType object in the
   Internet-standard MIB:

      ieee80212(55)

   For this interface, the value of the ifSpecific variable in the MIB-
   II [5] has the OBJECT IDENTIFIER value:

      dot12MIB    OBJECT IDENTIFIER ::= { transmission 45 }

   The values for the ifType object are defined by the IANAifType
   textual convention.  The Internet Assigned Numbers Authority (IANA)
   is responsible for the assignment of all Internet numbers, including
   new ifType values.  Therefore, IANA is responsible for maintaining
   the definition of this textual convention.  The current definition of
   the IANAifType textual convention is available from IANA's World Wide
   Web server at:

         http://www.iana.org/iana/

   The definitions presented here are based on the IEEE Standard
   802.12-1995, [6] Clause 13 "Layer management functions and services",
   and Annex C "GDMO Specifications for Demand Priority Managed
   Objects".  Implementors of these MIB objects should note that the
   IEEE document explicitly describes (in the form of Pascal pseudocode)
   when, where, and how various MAC attributes are measured.  The IEEE
   document also describes the effects of MAC actions that may be
   invoked by manipulating instances of the MIB objects defined here.





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