rfc1515.txt

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Network Working Group                                        D. McMaster
Request for Comments: 1515                SynOptics Communications, Inc.
                                                           K. McCloghrie
                                                Hughes LAN Systems, Inc.
                                                              S. Roberts
                                                Farallon Computing, Inc.
                                                          September 1993


                     Definitions of Managed Objects
             for IEEE 802.3 Medium Attachment Units (MAUs)

Status of this Memo

   This RFC specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" for the standardization state and status
   of this protocol.  Distribution of this memo is unlimited.

Abstract

   This document defines a portion of the Management Information Base
   (MIB) for use with network management protocols in TCP/IP-based
   internets.  In particular, it defines objects for managing IEEE 802.3
   Medium Attachment Units (MAUs).

Table of Contents

   1. The Network Management Framework ......................    2
   2. Objects ...............................................    2
   3. Overview ..............................................    2
   3.1 Terminology ..........................................    3
   3.2 Structure of MIB .....................................    3
   3.2.1 The Repeater MAU Basic Group Definitions ...........    3
   3.2.2 The Interface MAU Basic Group Definitions ..........    3
   3.2.3 The Broadband MAU Basic Group Definitions ..........    3
   3.3 Relationship to Other MIBs ...........................    3
   3.3.1 Relationship to the 'system' group .................    3
   3.3.2 Relationship to the 'interfaces' group .............    4
   3.3.3 Relationship to the 802.3 Repeater MIB .............    4
   3.4 Management of Internal MAUs ..........................    4
   4. Definitions ...........................................    5
   4.1 Groups in the Repeater MAU MIB .......................    5
   4.1.1 The Repeater MAU Basic Group Definitions ...........    6
   4.1.2 The Interface MAU Basic Group Definitions ..........   12
   4.1.3 The Broadband MAU Basic Group Definitions ..........   18
   4.2 Traps for use by 802.3 MAUs ..........................   20



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   5. Acknowledgments .......................................   21
   6. References ............................................   23
   7. Security Considerations ...............................   24
   8. Authors' Addresses ....................................   25

1.  The Network Management Framework

   The Internet-standard Network Management Framework consists of three
   components.  They are:

      STD 16, RFC 1155 [1] which defines the SMI, the mechanisms used
      for describing and naming objects for the purpose of management.
      STD 16, RFC 1212 [7] defines a more concise description mechanism,
      which is wholly consistent with the SMI.

      STD 17, RFC 1213 [4] which defines MIB-II, the core set of managed
      objects for the Internet suite of protocols.

      STD 15, RFC 1157 [3] which defines the SNMP, the protocol used for
      network access to managed objects.

   The Framework permits new objects to be defined for the purpose of
   experimentation and evaluation.

2.  Object Definitions

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  Objects in the MIB are
   defined using the subset of Abstract Syntax Notation One (ASN.1)
   defined in the SMI.  In particular, each object 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 the object types defined in this document represent
   attributes of an IEEE 802.3 MAU.  Several types of MAUs are defined
   in the IEEE 802.3/ISO 8802-3 CSMA/CD standard [9].

   These MAUs may be connected to IEEE 802.3 repeaters or to 802.3
   (Ethernet-like) interfaces.  For convenience this document refers to
   these devices as "repeater MAUs" and "interface MAUs."

   The definitions presented here are based on Draft 5 of Section 20 of
   IEEE P802.3p, "Layer Management for 10 Mb/s Medium Attachment Units



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RFC 1515                     802.3 MAU MIB                September 1993


   (MAUs), Section 20" [10] dated 11 July 1992.

3.1.  Terminology

   Refer to Section 3.1.2 of [13] for simple definitions of the terms
   "repeater," "port," and "MAU" as used in the context of this
   document.  For a more complete and precise definition of these terms,
   refer to Section 9 of [9].

3.2.  Structure of MIB

   Objects in this MIB are arranged into MIB groups.  Each MIB group is
   organized as a set of related objects.

3.2.1.  The Repeater MAU Basic Group Definitions

   This group contains all repeater MAU-related configuration, status,
   and control objects.  Implementation of the dot3RpMauBasicGroup is
   mandatory for MAUs attached to repeaters.

3.2.2.  The Interface MAU Basic Group Definitions

   This group contains all interface MAU-related configuration, status,
   and control objects.  Implementation of the dot3IfMauBasicGroup is
   mandatory for MAUs attached to interfaces.

3.2.3.  The Broadband MAU Basic Group Definitions

   This group contains all broadband-specific MAU-related configuration
   objects.  Implementation of the dot3BroadMauBasicGroup is mandatory
   for 10BROAD36 MAUs, and is not appropriate for other types of MAUs.

3.3.  Relationship to Other MIBs

   It is assumed that an agent implementing this MIB will also implement
   (at least) the 'system' group defined in MIB-II [4].  The following
   sections identify other MIBs that such an agent should implement.

3.3.1.  Relationship to the 'system' group

   In MIB-II, the 'system' group is defined as being mandatory for all
   systems such that each managed entity contains one instance of each
   object in the 'system' group.  Thus, those objects apply to the
   entity even if the entity's sole functionality is management of a
   MAU.






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3.3.2.  Relationship to the 'interfaces' group

   The sections of this document that define interface MAU-related
   objects specify an extension to the 'interfaces' group of MIB-II [4].
   An agent implementing these interface-MAU related objects must also
   implement the 'interfaces' group of MIB-II.  The value of the same as
   the value of 'ifIndex' used to instantiate the interface to which the
   given MAU is connected.

   It is expected that an agent implementing the interface-MAU related
   objects in this MIB will also implement the Ethernet-like Interfaces
   MIB [11].

   (Note that repeater ports are not represented as interfaces in the
   sense of MIB-II's 'interfaces' group.  See section 3.4.2 of the
   repeater MIB [12] for more details.)

3.3.3.  Relationship to the 802.3 Repeater MIB

   The section of this document that defines repeater MAU-related
   objects specifies an extension to the 802.3 Repeater MIB defined in
   [13].  An agent implementing these repeater-MAU related objects must
   also implement the 802.3 Repeater MIB.

   The values of 'rpMauGroupIndex' and 'rpMauPortIndex' used to
   instantiate a repeater MAU variable shall be the same as the values
   of 'rptrPortGroupIndex' and 'rptrPortIndex' used to instantiate the
   port to which the given MAU is connected.

3.4.  Management of Internal MAUs

   In some situations, a MAU can be "internal" -- i.e., its
   functionality is implemented entirely within a device.  For example,
   a managed repeater may contain an internal repeater- MAU and/or an
   internal interface-MAU through which management communications
   originating on one of the repeater's external ports pass in order to
   reach the management agent associated with the repeater.  Such
   internal MAUs may or may not be managed.  If they are managed,
   objects describing their attributes should appear in the appropriate
   MIB group -- dot3RpMauBasicGroup for internal repeater-MAUs and
   dot3IfMauBasicGroup for internal interface-MAUs.










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4.  Definitions

        MAU-MIB DEFINITIONS ::= BEGIN


        IMPORTS
            Counter                             FROM RFC1155-SMI
            OBJECT-TYPE                         FROM RFC-1212
            TRAP-TYPE                           FROM RFC-1215;


        snmpDot3MauMgt OBJECT IDENTIFIER ::= { mib-2 26 }


        --                      References
        --
        -- The following references are used throughout this MIB:
        --
        -- [RFC 1213]
        --    refers to McCloghrie, K., and M. Rose, Editors,
        --    Management Information Base for Network Management
        --    of TCP/IP-based internets: MIB-II, STD 17, RFC 1213,
        --    Hughes LAN Systems, Performance Systems International,
        --    March 1991.
        --
        -- [RFC 1368]
        --    refers to McMaster, D.,  and K. McCloghrie, Editors,
        --    Definitions of Managed Objects for IEEE 802.3 Repeater
        --    Devices, RFC 1368, SynOptics Communications, Hughes
        --    LAN Systems, October 1992.
        --
        -- [IEEE 802.3 MAU Mgt]
        --    refers to IEEE P802.3p, 'Layer Management for 10 Mb/s
        --    Medium Access Unit (MAUs), Section 20,' Draft Supplement
        --    to ANSI/IEEE 802.3, Draft 5, 11 July 1992.


        --                      MIB Groups
        --
        --   The dot3RpMauBasicGroup is mandatory for MAUs attached to
        --     repeaters.
        --   The dot3IfMauBasicGroup is mandatory for MAUs attached to
        --     DTEs (interfaces).
        --   The dot3BroadMauBasicGroup is mandatory for broadband MAUs
        --     attached to DTEs.


        dot3RpMauBasicGroup



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            OBJECT IDENTIFIER ::= { snmpDot3MauMgt 1 }
        dot3IfMauBasicGroup
            OBJECT IDENTIFIER ::= { snmpDot3MauMgt 2 }
        dot3BroadMauBasicGroup
            OBJECT IDENTIFIER ::= { snmpDot3MauMgt 3 }


        -- object identifiers for MAU types
        --  (see rpMauType and ifMauType for usage)
        dot3MauType
            OBJECT IDENTIFIER ::= { snmpDot3MauMgt 4 }
        dot3MauTypeAUI        -- no internal MAU, view from AUI
            OBJECT IDENTIFIER ::= { dot3MauType 1 }
        dot3MauType10Base5    -- thick coax MAU (per 802.3 section 8)
            OBJECT IDENTIFIER ::= { dot3MauType 2 }
        dot3MauTypeFoirl      -- FOIRL MAU (per 802.3 section 9.9)
            OBJECT IDENTIFIER ::= { dot3MauType 3 }
        dot3MauType10Base2    -- thin coax MAU (per 802.3 section 10)
            OBJECT IDENTIFIER ::= { dot3MauType 4 }
        dot3MauType10BaseT    -- UTP MAU (per 802.3 section 14)
            OBJECT IDENTIFIER ::= { dot3MauType 5 }
        dot3MauType10BaseFP   -- passive fiber MAU (per 802.3 section 16)
            OBJECT IDENTIFIER ::= { dot3MauType 6 }
        dot3MauType10BaseFB   -- sync fiber MAU (per 802.3 section 17)
            OBJECT IDENTIFIER ::= { dot3MauType 7 }
        dot3MauType10BaseFL   -- async fiber MAU (per 802.3 section 18)
            OBJECT IDENTIFIER ::= { dot3MauType 8 }
        dot3MauType10Broad36  -- broadband DTE MAU (per 802.3 section 11)
            -- note that 10BROAD36 MAUs can be attached to interfaces but
            -- not to repeaters
            OBJECT IDENTIFIER ::= { dot3MauType 9 }


        --
        --                    The Repeater MAU Basic Group
        --
        -- Implementation of the Repeater MAU Basic Group is mandatory
        -- for MAUs attached to repeaters.

        --
        -- The Basic Repeater MAU Table
        --

        rpMauTable OBJECT-TYPE
            SYNTAX    SEQUENCE OF RpMauEntry
            ACCESS    not-accessible
            STATUS    mandatory
            DESCRIPTION



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RFC 1515                     802.3 MAU MIB                September 1993


                    "Table of descriptive and status information about
                    the MAU(s) attached to the ports of a repeater."
            ::= { dot3RpMauBasicGroup 1 }

        rpMauEntry OBJECT-TYPE
            SYNTAX    RpMauEntry
            ACCESS    not-accessible
            STATUS    mandatory
            DESCRIPTION