<pre>Network Working Group                                        K. de Graaf
Request for Comments: 2239                              3Com Corporation
Category: Standards Track                                   D. Romascanu
                                                     Madge Networks Ltd.
                                                             D. McMaster
                                                      Cisco Systems Inc.
                                                           K. McCloghrie
                                                      Cisco Systems Inc.
                                                              S. Roberts
                                                Farallon Computing, Inc.
                                                           November 1997


             <span class="h1">Definitions of Managed Objects for IEEE 802.3</span>
               <span class="h1">Medium Attachment Units (MAUs) using SMIv2</span>


Status of this Memo

   This document 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" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1997).  All Rights Reserved.

Table of Contents

   <a href="#section-1">1</a> The SNMPv2 Network Management Framework ...............    <a href="#page-2">2</a>
   <a href="#section-1.1">1.1</a> Object Definitions ..................................    <a href="#page-2">2</a>
   <a href="#section-2">2</a> Overview ..............................................    <a href="#page-3">3</a>
   <a href="#section-2.1">2.1</a> Relationship to <a href="./rfc1515">RFC 1515</a> ............................    <a href="#page-3">3</a>
   <a href="#section-2.2">2.2</a> MAU Management ......................................    <a href="#page-3">3</a>
   <a href="#section-2.3">2.3</a> Relationship to Other MIBs ..........................    <a href="#page-3">3</a>
   <a href="#section-2.3.1">2.3.1</a> Relationship to the MIB-II 'interfaces' group .....    <a href="#page-3">3</a>
   <a href="#section-2.3.2">2.3.2</a> Relationship to the 802.3 Repeater MIB ............    <a href="#page-4">4</a>
   <a href="#section-2.4">2.4</a> Management of Internal MAUs .........................    <a href="#page-4">4</a>
   <a href="#section-3">3</a> Definitions ...........................................    <a href="#page-4">4</a>
   <a href="#section-4">4</a> Acknowledgements ......................................   <a href="#page-39">39</a>
   <a href="#section-5">5</a> References ............................................   <a href="#page-40">40</a>
   <a href="#section-6">6</a> Security Considerations ...............................   <a href="#page-41">41</a>
   <a href="#section-7">7</a> Authors' Addresses ....................................   <a href="#page-41">41</a>
   <a href="#section-8">8</a> Full Copyright Statement ..............................   <a href="#page-43">43</a>





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Abstract

   This memo defines an portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it defines objects for managing 10 and 100 Mb/second
   Medium Attachment Units (MAUs) based on IEEE Std 802.3 <a href="#section-30">Section 30</a>,
   "10 &amp; 100 Mb/s Management," October 26, 1995.

<span class="h2"><a class="selflink" id="section-1" href="#section-1">1</a>.  The SNMPv2 Network Management Framework</span>

   The SNMPv2 Network Management Framework presently consists of three
   major components.  They are:

   o    the SMI, described in <a href="./rfc1902">RFC 1902</a> [<a href="#ref-6" title="&quot;Structure of Management Information for version 2 of the Simple Network Management Protocol (SNMPv2)&quot;">6</a>] - the mechanisms used
        for describing and naming objects for the purpose of management.

   o    the MIB-II, STD 17, <a href="./rfc1213">RFC 1213</a> [<a href="#ref-5" title="&quot;Management Information Base for Network Management of TCP/IP-based internets: MIB-II&quot;">5</a>] - the core set of
        managed objects for the Internet suite of protocols.

   o    the protocol, STD 15, <a href="./rfc1157">RFC 1157</a> [<a href="#ref-10" title="&quot;Simple Network Management Protocol&quot;">10</a>] and/or <a href="./rfc1905">RFC 1905</a> [<a href="#ref-9" title="&quot;Protocol Operations for version 2 of the Simple Network Management Protocol (SNMPv2)&quot;">9</a>] -
        the protocol used for accessing managed information.

   Textual conventions are defined in <a href="./rfc1903">RFC 1903</a> [<a href="#ref-7" title="&quot;Textual Conventions for version 2 of the Simple Network Management Protocol (SNMPv2)&quot;">7</a>], and conformance
   statements are defined in <a href="./rfc1904">RFC 1904</a> [<a href="#ref-8" title="&quot;Conformance Statements for version 2 of the Simple Network Management Protocol (SNMPv2)&quot;">8</a>].

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

<span class="h3"><a class="selflink" id="section-1.1" href="#section-1.1">1.1</a>.  Object Definitions</span>

   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 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.












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<span class="h2"><a class="selflink" id="section-2" href="#section-2">2</a>.  Overview</span>

<span class="h3"><a class="selflink" id="section-2.1" href="#section-2.1">2.1</a>.  Relationship to <a href="./rfc1515">RFC 1515</a></span>

   This MIB is intended to be a superset of that defined by <a href="./rfc1515">RFC 1515</a>
   [<a href="#ref-11" title="&quot;Definitions of Managed Objects for IEEE 802.3 Medium Attachment Units (MAUs)&quot;">11</a>], which will go to historic status.  This MIB includes all of the
   objects contained in that MIB, plus several new ones which provide
   additional capabilities.  Implementors are encouraged to support all
   applicable conformance groups in order to make the best use of the
   new functionality provided by this MIB.  The new objects provide
   management support for:

   o    management of 100 Mb/s devices

   o    auto-negotiation on interface MAUs

   o    jack management

<span class="h3"><a class="selflink" id="section-2.2" href="#section-2.2">2.2</a>.  MAU Management</span>

   Instances of these object types represent attributes of an IEEE 802.3
   MAU.  Several types of MAUs are defined in the IEEE 802.3 CSMA/CD
   standard [<a href="#ref-1">1</a>] and [<a href="#ref-2" title="&quot;MAC Parameters, Physical Layer, Medium Attachment Units and Repeater for 100 Mb/s Operation, Type 100BASE-T,&quot;">2</a>].  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 <a href="#section-30.5">Section 30.5</a>, "Layer
   Management for 10 &amp; 100 Mb/s Medium Attachment Units (MAUs)", and
   Annex 30A, "GDMO Specifications for 802.3 managed objects" of IEEE
   Std 802.3u-1995.  That specification includes definitions for both
   10Mb/s and 100Mb/s devices, and is essentially a superset of the
   10Mb/s definitions given by IEEE 802.3 <a href="#section-20">Section 20</a>.  This
   specification is intended to serve the same purpose: to provide for
   management of both 10Mb/s and 100Mb/s MAUs.

<span class="h3"><a class="selflink" id="section-2.3" href="#section-2.3">2.3</a>.  Relationship to Other MIBs</span>

   It is assumed that an agent implementing this MIB will also implement
   (at least) the 'system' group defined in MIB-II [<a href="#ref-5" title="&quot;Management Information Base for Network Management of TCP/IP-based internets: MIB-II&quot;">5</a>].  The following
   sections identify other MIBs that such an agent should implement.

<span class="h4"><a class="selflink" id="section-2.3.1" href="#section-2.3.1">2.3.1</a>.  Relationship to the MIB-II 'interfaces' group</span>

   The sections of this document that define interface MAU-related
   objects specify an extension to the 'interfaces' group of MIB-II.  An
   agent implementing these interface-MAU related objects must also




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   implement the 'interfaces' group of MIB-II.  The value of the object
   ifMauIfIndex is 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, <a href="./rfc1650">RFC 1650</a>.

   (Note that repeater ports are not represented as interfaces in the
   sense of MIB-II's 'interfaces' group.)

<span class="h4"><a class="selflink" id="section-2.3.2" href="#section-2.3.2">2.3.2</a>.  Relationship to the 802.3 Repeater MIB</span>

   The section of this document that defines repeater MAU-related
   objects specifies an extension to the 802.3 Repeater MIB defined in
   [<a href="#ref-4" title="&quot;Definitions of Managed Objects for IEEE 802.3 Repeater Devices using SMIv2&quot;">4</a>].  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.

<span class="h3"><a class="selflink" id="section-2.4" href="#section-2.4">2.4</a>.  Management of Internal MAUs</span>

   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 subtree:

   dot3RpMauBasicGroup for internal repeater-MAUs and
   dot3IfMauBasicGroup for internal interface-MAUs.

<span class="h2"><a class="selflink" id="section-3" href="#section-3">3</a>.  Definitions</span>

   MAU-MIB DEFINITIONS ::= BEGIN

   IMPORTS
       Counter32, Integer32,
       OBJECT-TYPE, MODULE-IDENTITY, NOTIFICATION-TYPE,
       OBJECT-IDENTITY, mib-2
           FROM SNMPv2-SMI
       TruthValue, TEXTUAL-CONVENTION



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           FROM SNMPv2-TC
       OBJECT-GROUP, MODULE-COMPLIANCE, NOTIFICATION-GROUP
           FROM SNMPv2-CONF;

   mauMod MODULE-IDENTITY
       LAST-UPDATED "9710310000Z"
       ORGANIZATION "IETF HUB MIB Working Group"
       CONTACT-INFO
           "WG E-mail: hubmib@hprnd.rose.hp.com

                Chair: Dan Romascanu
               Postal: Madge Networks (Israel) Ltd.
                       Atidim Technology Park, Bldg. 3
                       Tel Aviv 61131, Israel
                  Tel: 972-3-6458414, 6458458
                  Fax: 972-3-6487146
               E-mail: dromasca@madge.com

               Editor: Kathryn de Graaf
               Postal: 3Com Corporation
                       118 Turnpike Rd.
                       Southborough, MA  01772
                       USA
                  Tel: (508)229-1627
                  Fax: (508)490-5882
               E-mail: kdegraaf@isd.3com.com"
       DESCRIPTION
               "Management information for 802.3 MAUs.

               The following references are used throughout this
               MIB module:

               [IEEE 802.3 Std]
                  refers to IEEE 802.3/ISO 8802-3 Information
                  processing systems - Local area networks -
                  Part 3: Carrier sense multiple access with
                  collision detection (CSMA/CD) access method
                  and physical layer specifications (1993),
                  and to IEEE Std 802.3u-1995, Supplement to
                  IEEE Std 802.3, clauses 22 through 29.

               [IEEE 802.3 Mgt]
                  refers to IEEE 802.3u-1995, - 10 Mb/s &amp;
                  100 Mb/s Management, <a href="#section-30">Section 30</a> -
                  Supplement to IEEE Std 802.3."
       ::= { snmpDot3MauMgt 6 }





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


   -- textual conventions

   JackType ::= TEXTUAL-CONVENTION
       STATUS     current
       DESCRIPTION
               "Common enumeration values for repeater and
               interface MAU jack types."
       SYNTAX     INTEGER {
                      other(1),
                      rj45(2),
                      rj45S(3), -- rj45 shielded
                      db9(4),
                      bnc(5),
                      fAUI(6),  -- female aui
                      mAUI(7),  -- male aui
                      fiberSC(8),
                      fiberMIC(9),
                      fiberST(10),
                      telco(11)
                  }


   dot3RpMauBasicGroup         OBJECT IDENTIFIER ::= { snmpDot3MauMgt 1 }
   dot3IfMauBasicGroup         OBJECT IDENTIFIER ::= { snmpDot3MauMgt 2 }
   dot3BroadMauBasicGroup      OBJECT IDENTIFIER ::= { snmpDot3MauMgt 3 }

   dot3IfMauAutoNegGroup       OBJECT IDENTIFIER ::= { snmpDot3MauMgt 5 }

   -- object identities for MAU types
   --  (see rpMauType and ifMauType for usage)

   dot3MauType
       OBJECT IDENTIFIER ::= { snmpDot3MauMgt 4 }

   dot3MauTypeAUI OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "no internal MAU, view from AUI"
       ::= { dot3MauType 1 }

   dot3MauType10Base5 OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "thick coax MAU (per 802.3 <a href="#section-8">section 8</a>)"
       ::= { dot3MauType 2 }



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   dot3MauTypeFoirl OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "FOIRL MAU (per 802.3 <a href="#section-9.9">section 9.9</a>)"
       ::= { dot3MauType 3 }

   dot3MauType10Base2 OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "thin coax MAU (per 802.3 <a href="#section-10">section 10</a>)"
       ::= { dot3MauType 4 }

   dot3MauType10BaseT OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "UTP MAU (per 802.3 <a href="#section-14">section 14</a>)"
       ::= { dot3MauType 5 }

   dot3MauType10BaseFP OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "passive fiber MAU (per 802.3 <a href="#section-16">section 16</a>)"
       ::= { dot3MauType 6 }

   dot3MauType10BaseFB OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "sync fiber MAU (per 802.3 <a href="#section-17">section 17</a>)"
       ::= { dot3MauType 7 }

   dot3MauType10BaseFL OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "async fiber MAU (per 802.3 <a href="#section-18">section 18</a>)"
       ::= { dot3MauType 8 }

   dot3MauType10Broad36 OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "broadband DTE MAU (per 802.3 <a href="#section-11">section 11</a>). Note
               that 10BROAD36 MAUs can be attached to interfaces
               but not to repeaters."
       ::= { dot3MauType 9 }

   ------ new since <a href="./rfc1515">RFC 1515</a>:

   dot3MauType10BaseTHD OBJECT-IDENTITY
       STATUS     current



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       DESCRIPTION
               "UTP MAU (per 802.3 <a href="#section-14">section 14</a>), half duplex mode"
       ::= { dot3MauType 10 }

   dot3MauType10BaseTFD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "UTP MAU (per 802.3 <a href="#section-14">section 14</a>), full duplex mode"
       ::= { dot3MauType 11 }

   dot3MauType10BaseFLHD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "async fiber MAU (per 802.3 <a href="#section-18">section 18</a>), half
               duplex mode"
       ::= { dot3MauType 12 }

   dot3MauType10BaseFLFD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "async fiber MAU (per 802.3 <a href="#section-18">section 18</a>), full
               duplex mode"
       ::= { dot3MauType 13 }

   dot3MauType100BaseT4 OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "4 pair categ. 3 UTP (per 802.3 <a href="#section-23">section 23</a>)"
       ::= { dot3MauType 14 }

   dot3MauType100BaseTXHD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "2 pair categ. 5 UTP (per 802.3 <a href="#section-25">section 25</a>), half
               duplex mode"
       ::= { dot3MauType 15 }

   dot3MauType100BaseTXFD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "2 pair categ. 5 UTP (per 802.3 <a href="#section-25">section 25</a>), full
               duplex mode"
       ::= { dot3MauType 16 }

   dot3MauType100BaseFXHD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "X fiber over PMT (per 802.3 <a href="#section-26">section 26</a>), half



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               duplex mode"
       ::= { dot3MauType 17 }

   dot3MauType100BaseFXFD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "X fiber over PMT (per 802.3 <a href="#section-26">section 26</a>), full
               duplex mode"
       ::= { dot3MauType 18 }

   dot3MauType100BaseT2HD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "2 pair categ. 3 UTP (per 802.3 <a href="#section-32">section 32</a>), half
               duplex mode"
       ::= { dot3MauType 19 }

   dot3MauType100BaseT2FD OBJECT-IDENTITY
       STATUS     current
       DESCRIPTION
               "2 pair categ. 3 UTP (per 802.3 <a href="#section-32">section 32</a>), full
               duplex mode"
       ::= { dot3MauType 20 }


   --
   -- The Basic Repeater MAU Table
   --

   rpMauTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF RpMauEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "Table of descriptive and status information about
               the MAU(s) attached to the ports of a repeater."
       ::= { dot3RpMauBasicGroup 1 }

   rpMauEntry OBJECT-TYPE
       SYNTAX     RpMauEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry in the table, containing information
               about a single MAU."
       INDEX      { rpMauGroupIndex, rpMauPortIndex, rpMauIndex }
       ::= { rpMauTable 1 }




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   RpMauEntry ::=
       SEQUENCE {
           rpMauGroupIndex
               Integer32,
           rpMauPortIndex
               Integer32,
           rpMauIndex
               Integer32,
           rpMauType
               OBJECT IDENTIFIER,
           rpMauStatus
               INTEGER,
           rpMauMediaAvailable
               INTEGER,
           rpMauMediaAvailableStateExits
               Counter32,
           rpMauJabberState
               INTEGER,
           rpMauJabberingStateEnters
               Counter32,
           rpMauFalseCarriers
               Counter32
       }

   rpMauGroupIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the group
               containing the port to which the MAU described by
               this entry is connected.

               Note:  In practice, a group will generally be a
               field-replaceable unit (i.e., module, card, or
               board) that can fit in the physical system
               enclosure, and the group number will correspond to
               a number marked on the physical enclosure.

               The group denoted by a particular value of this
               object is the same as the group denoted by the
               same value of rptrGroupIndex."
       ::= { rpMauEntry 1 }

   rpMauPortIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS read-only
       STATUS     current



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       DESCRIPTION
               "This variable uniquely identifies the repeater
               port within group rpMauGroupIndex to which the MAU
               described by this entry is connected."
       REFERENCE
               "Reference <a href="./rfc1516">RFC 1516</a>, rptrPortIndex."
       ::= { rpMauEntry 2 }

   rpMauIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the MAU
               described by this entry from among other MAUs
               connected to the same port (rpMauPortIndex)."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.1, aMAUID."
       ::= { rpMauEntry 3 }

   rpMauType OBJECT-TYPE
       SYNTAX     OBJECT IDENTIFIER
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This object identifies the 10 or 100 Mb/s
               baseband MAU type.  An initial set of MAU types
               are defined above.  The assignment of OBJECT
               IDENTIFIERs to new types of MAUs is managed by the
               IANA.  If the MAU type is unknown, the object
               identifier

               unknownMauType OBJECT IDENTIFIER ::= { 0 0 }

               is returned.  Note that unknownMauType is a
               syntactically valid object identifier, and any
               conformant implementation of ASN.1 and the BER
               must be able to generate and recognize this
               value."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.2, aMAUType."
       ::= { rpMauEntry 4 }

   rpMauStatus OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      unknown(2),
                      operational(3),



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                      standby(4),
                      shutdown(5),
                      reset(6)
                  }
       MAX-ACCESS read-write
       STATUS     current
       DESCRIPTION
               "The current state of the MAU.  This object may be
               implemented as a read-only object by those agents
               and MAUs that do not implement software control of
               the MAU state.  Some agents may not support
               setting the value of this object to some of the
               enumerated values.

               The value other(1) is returned if the MAU is in a
               state other than one of the states 2 through 6.

               The value unknown(2) is returned when the MAU's
               true state is unknown; for example, when it is
               being initialized.

               A MAU in the operational(3) state is fully
               functional, operates, and passes signals to its
               attached DTE or repeater port in accordance to its
               specification.

               A MAU in standby(4) state forces DI and CI to idle
               and the media transmitter to idle or fault, if
               supported.  Standby(4) mode only applies to link
               type MAUs.  The state of rpMauMediaAvailable is
               unaffected.

               A MAU in shutdown(5) state assumes the same
               condition on DI, CI, and the media transmitter as
               though it were powered down or not connected.  The
               MAU may return other(1) value for the
               rpMauJabberState and rpMauMediaAvailable objects
               when it is in this state.  For an AUI, this state
               will remove power from the AUI.

               Setting this variable to the value reset(6) resets
               the MAU in the same manner as a power-off, power-
               on cycle of at least one-half second would.  The
               agent is not required to return the value reset
               (6).

               Setting this variable to the value operational(3),
               standby(4), or shutdown(5) causes the MAU to



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               assume the respective state except that setting a
               mixing-type MAU or an AUI to standby(4) will cause
               the MAU to enter the shutdown state."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.7, aMAUAdminState,
               30.5.1.2.2, acMAUAdminControl, and 30.5.1.2.1,
               acRESETMAU."
       ::= { rpMauEntry 5 }

   rpMauMediaAvailable OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      unknown(2),
                      available(3),
                      notAvailable(4),
                      remoteFault(5),
                      invalidSignal(6),
                      remoteJabber(7),
                      remoteLinkLoss(8),
                      remoteTest(9)
                  }
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "If the MAU is a link or fiber type (FOIRL,
               10BASE-T, 10BASE-F) then this is equivalent to the
               link test fail state/low light function.  For an
               AUI or a coax (including broadband) MAU this
               indicates whether or not loopback is detected on
               the DI circuit.  The value of this attribute
               persists between packets for MAU types AUI,
               10BASE5, 10BASE2, 10BROAD36, and 10BASE-FP.

               The value other(1) is returned if the
               mediaAvailable state is not one of 2 through 6.

               The value unknown(2) is returned when the MAU's
               true state is unknown; for example, when it is
               being initialized.  At power-up or following a
               reset, the value of this attribute will be unknown
               for AUI, coax, and 10BASE-FP MAUs.  For these MAUs
               loopback will be tested on each transmission
               during which no collision is detected.  If DI is
               receiving input when DO returns to IDL after a
               transmission and there has been no collision
               during the transmission then loopback will be
               detected.  The value of this attribute will only
               change during non-collided transmissions for AUI,



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               coax, and 10BASE-FP MAUs.

               For 100BASE-T4, 100BASE-TX and 100BASE-FX the
               enumerations match the states within the
               respective link integrity state diagrams, fig 23-
               12 and 24-15 of sections <a href="#section-23">23</a> and <a href="#section-24">24</a> of [<a href="#ref-2" title="&quot;MAC Parameters, Physical Layer, Medium Attachment Units and Repeater for 100 Mb/s Operation, Type 100BASE-T,&quot;">2</a>].  Any
               MAU which implements management of auto-
               negotiation will map remote fault indication to
               remote fault.

               The value available(3) indicates that the link,
               light, or loopback is normal.  The value
               notAvailable(4) indicates link loss, low light, or
               no loopback.

               The value remoteFault(5) indicates that a fault
               has been detected at the remote end of the link.
               This value applies to 10BASE-FB, 100BASE-T4 Far
               End Fault Indication and non-specified remote
               faults from a system running auto-negotiation.
               The values remoteJabber(7), remoteLinkLoss(8), and
               remoteTest(9) should be used instead of
               remoteFault(5) where the reason for remote fault
               is identified in the remote signaling protocol.

               The value invalidSignal(6) indicates that an
               invalid signal has been received from the other
               end of the link.  InvalidSignal(6) applies only to
               MAUs of type 10BASE-FB.

               Where an IEEE Std 802.3u-1995 clause 22 MII is
               present, a logic one in the remote fault bit
               (reference <a href="#section-22.2.4.2.8">section 22.2.4.2.8</a> of that document)
               maps to the value remoteFault(5), and a logic zero
               in the link status bit (reference <a href="#section-22.2.4.2.10">section</a>
               <a href="#section-22.2.4.2.10">22.2.4.2.10</a> of that document) maps to the value
               notAvailable(4).  The value notAvailable(4) takes
               precedence over the value remoteFault(5)."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.4, aMediaAvailable."
       ::= { rpMauEntry 6 }

   rpMauMediaAvailableStateExits OBJECT-TYPE
       SYNTAX     Counter32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A count of the number of times that



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<span class="grey"><a href="./rfc2239">RFC 2239</a>          Managed Objects for IEEE 802.3 MAUs      November 1997</span>


               rpMauMediaAvailable for this MAU instance leaves
               the state available(3)."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.5, aLoseMediaCounter."
       ::= { rpMauEntry 7 }

   rpMauJabberState OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      unknown(2),
                      noJabber(3),
                      jabbering(4)
                  }
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The value other(1) is returned if the jabber
               state is not 2, 3, or 4.  The agent must always
               return other(1) for MAU type dot3MauTypeAUI.

               The value unknown(2) is returned when the MAU's
               true state is unknown; for example, when it is
               being initialized.

               If the MAU is not jabbering the agent returns
               noJabber(3).  This is the 'normal' state.

               If the MAU is in jabber state the agent returns
               the jabbering(4) value."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.6,
               aJabber.jabberFlag."
       ::= { rpMauEntry 8 }

   rpMauJabberingStateEnters OBJECT-TYPE
       SYNTAX     Counter32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A count of the number of times that
               mauJabberState for this MAU instance enters the
               state jabbering(4).  For MAUs of type
               dot3MauTypeAUI, dot3MauType100BaseT4,
               dot3MauType100BaseTX, and dot3MauType100BaseFX,
               this counter will always indicate zero."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.6,
               aJabber.jabberCounter."



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       ::= { rpMauEntry 9 }

   rpMauFalseCarriers OBJECT-TYPE
       SYNTAX     Counter32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A count of the number of false carrier events
               during IDLE in 100BASE-X links.  This counter does
               not increment at the symbol rate.  It can
               increment after a valid carrier completion at a
               maximum rate of once per 100 ms until the next
               carrier event.

               This counter increments only for MAUs of type
               dot3MauType100BaseT4, dot3MauType100BaseTX, and
               dot3MauType100BaseFX.  For all other MAU types,
               this counter will always indicate zero.

               The approximate minimum time for rollover of this
               counter is 7.4 hours."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.10, aFalseCarriers."
       ::= { rpMauEntry 10 }


   -- The rpJackTable applies to MAUs attached to repeaters
   -- which have one or more external jacks (connectors).

   rpJackTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF RpJackEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "Information about the external jacks attached to
               MAUs attached to the ports of a repeater."
       ::= { dot3RpMauBasicGroup 2 }

   rpJackEntry OBJECT-TYPE
       SYNTAX     RpJackEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry in the table, containing information
               about a particular jack."

       INDEX    { rpMauGroupIndex,
                  rpMauPortIndex,



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                  rpMauIndex,
                  rpJackIndex }
       ::= { rpJackTable 1 }

   RpJackEntry ::=
       SEQUENCE {
           rpJackIndex
               Integer32,
           rpJackType
               JackType
       }

   rpJackIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the jack
               described by this entry from among other jacks
               attached to the same MAU (rpMauIndex)."
       ::= { rpJackEntry 1 }

   rpJackType OBJECT-TYPE
       SYNTAX     JackType
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The jack connector type, as it appears on the
               outside of the system."
       ::= { rpJackEntry 2 }


   --
   -- The Basic Interface MAU Table
   --

   ifMauTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF IfMauEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "Table of descriptive and status information about
               MAU(s) attached to an interface."

       ::= { dot3IfMauBasicGroup 1 }

   ifMauEntry OBJECT-TYPE
       SYNTAX     IfMauEntry



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       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry in the table, containing information
               about a single MAU."
       INDEX      { ifMauIfIndex, ifMauIndex }
       ::= { ifMauTable 1 }

   IfMauEntry ::=
       SEQUENCE {
           ifMauIfIndex
               Integer32,
           ifMauIndex
               Integer32,
           ifMauType
               OBJECT IDENTIFIER,
           ifMauStatus
               INTEGER,
           ifMauMediaAvailable
               INTEGER,
           ifMauMediaAvailableStateExits
               Counter32,
           ifMauJabberState
               INTEGER,
           ifMauJabberingStateEnters
               Counter32,
           ifMauFalseCarriers
               Counter32,
           ifMauTypeList
               Integer32,
           ifMauDefaultType
               OBJECT IDENTIFIER,
           ifMauAutoNegSupported
               TruthValue
       }

   ifMauIfIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the interface
               to which the MAU described by this entry is
               connected."
       REFERENCE
               "<a href="./rfc1213">RFC 1213</a>, ifIndex"
       ::= { ifMauEntry 1 }




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   ifMauIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the MAU
               described by this entry from among other MAUs
               connected to the same interface (ifMauIfIndex)."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.1, aMAUID."
       ::= { ifMauEntry 2 }

   ifMauType OBJECT-TYPE
       SYNTAX     OBJECT IDENTIFIER
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This object identifies the 10 or 100 Mb/s
               baseband or broadband MAU type.  An initial set of
               MAU types are defined above.  The assignment of
               OBJECT IDENTIFIERs to new types of MAUs is managed
               by the IANA.  If the MAU type is unknown, the
               object identifier

               unknownMauType OBJECT IDENTIFIER ::= { 0 0 }

               is returned.  Note that unknownMauType is a
               syntactically valid object identifier, and any
               conformant implementation of ASN.1 and the BER
               must be able to generate and recognize this value.

               This object represents the operational type of the
               MAU, as determined by either (1) the result of the
               auto-negotiation function or (2) if auto-
               negotiation is not enabled or is not implemented
               for this MAU, by the value of the object
               ifMauDefaultType.  In case (2), a set to the
               object ifMauDefaultType will force the MAU into
               the new operating mode."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.2, aMAUType."
       ::= { ifMauEntry 3 }

   ifMauStatus OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      unknown(2),
                      operational(3),



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                      standby(4),
                      shutdown(5),
                      reset(6)
                  }
       MAX-ACCESS read-write
       STATUS     current
       DESCRIPTION
               "The current state of the MAU.  This object may be
               implemented as a read-only object by those agents
               and MAUs that do not implement software control of
               the MAU state.  Some agents may not support
               setting the value of this object to some of the
               enumerated values.

               The value other(1) is returned if the MAU is in a
               state other than one of the states 2 through 6.

               The value unknown(2) is returned when the MAU's
               true state is unknown; for example, when it is
               being initialized.

               A MAU in the operational(3) state is fully
               functional, operates, and passes signals to its
               attached DTE or repeater port in accordance to its
               specification.

               A MAU in standby(4) state forces DI and CI to idle
               and the media transmitter to idle or fault, if
               supported.  Standby(4) mode only applies to link
               type MAUs.  The state of ifMauMediaAvailable is
               unaffected.

               A MAU in shutdown(5) state assumes the same
               condition on DI, CI, and the media transmitter as
               though it were powered down or not connected.  The
               MAU may return other(1) value for the
               ifMauJabberState and ifMauMediaAvailable objects
               when it is in this state.  For an AUI, this state
               will remove power from the AUI.

               Setting this variable to the value reset(6) resets
               the MAU in the same manner as a power-off, power-
               on cycle of at least one-half second would.  The
               agent is not required to return the value reset
               (6).

               Setting this variable to the value operational(3),
               standby(4), or shutdown(5) causes the MAU to



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               assume the respective state except that setting a
               mixing-type MAU or an AUI to standby(4) will cause
               the MAU to enter the shutdown state."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.7, aMAUAdminState,
               30.5.1.2.2, acMAUAdminControl, and 30.5.1.2.1,
               acRESETMAU."
       ::= { ifMauEntry 4 }

   ifMauMediaAvailable OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      unknown(2),
                      available(3),
                      notAvailable(4),
                      remoteFault(5),
                      invalidSignal(6),
                      remoteJabber(7),
                      remoteLinkLoss(8),
                      remoteTest(9)
                  }
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "If the MAU is a link or fiber type (FOIRL,
               10BASE-T, 10BASE-F) then this is equivalent to the
               link test fail state/low light function.  For an
               AUI or a coax (including broadband) MAU this
               indicates whether or not loopback is detected on
               the DI circuit.  The value of this attribute
               persists between packets for MAU types AUI,
               10BASE5, 10BASE2, 10BROAD36, and 10BASE-FP.

               The value other(1) is returned if the
               mediaAvailable state is not one of 2 through 6.

               The value unknown(2) is returned when the MAU's
               true state is unknown; for example, when it is
               being initialized.  At power-up or following a
               reset, the value of this attribute will be unknown
               for AUI, coax, and 10BASE-FP MAUs.  For these MAUs
               loopback will be tested on each transmission
               during which no collision is detected.  If DI is
               receiving input when DO returns to IDL after a
               transmission and there has been no collision
               during the transmission then loopback will be
               detected.  The value of this attribute will only
               change during non-collided transmissions for AUI,



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               coax, and 10BASE-FP MAUs.

               For 100BASE-T4, 100BASE-TX and 100BASE-FX the
               enumerations match the states within the
               respective link integrity state diagrams, fig 23-
               12 and 24-15 of sections <a href="#section-23">23</a> and <a href="#section-24">24</a> of [<a href="#ref-2" title="&quot;MAC Parameters, Physical Layer, Medium Attachment Units and Repeater for 100 Mb/s Operation, Type 100BASE-T,&quot;">2</a>].  Any
               MAU which implements management of auto-
               negotiation will map remote fault indication to
               remote fault.

               The value available(3) indicates that the link,
               light, or loopback is normal.  The value
               notAvailable(4) indicates link loss, low light, or
               no loopback.

               The value remoteFault(5) indicates that a fault
               has been detected at the remote end of the link.
               This value applies to 10BASE-FB, 100BASE-T4 Far
               End Fault Indication and non-specified remote
               faults from a system running auto-negotiation.
               The values remoteJabber(7), remoteLinkLoss(8), and
               remoteTest(9) should be used instead of
               remoteFault(5) where the reason for remote fault
               is identified in the remote signaling protocol.

               The value invalidSignal(6) indicates that an
               invalid signal has been received from the other
               end of the link.  InvalidSignal(6) applies only to
               MAUs of type 10BASE-FB.

               Where an IEEE Std 802.3u-1995 clause 22 MII is
               present, a logic one in the remote fault bit
               (reference <a href="#section-22.2.4.2.8">section 22.2.4.2.8</a> of that document)
               maps to the value remoteFault(5), and a logic zero
               in the link status bit (reference <a href="#section-22.2.4.2.10">section</a>
               <a href="#section-22.2.4.2.10">22.2.4.2.10</a> of that document) maps to the value
               notAvailable(4).  The value notAvailable(4) takes
               precedence over the value remoteFault(5)."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.4, aMediaAvailable."
       ::= { ifMauEntry 5 }

   ifMauMediaAvailableStateExits OBJECT-TYPE
       SYNTAX     Counter32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A count of the number of times that



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<span class="grey"><a href="./rfc2239">RFC 2239</a>          Managed Objects for IEEE 802.3 MAUs      November 1997</span>


               ifMauMediaAvailable for this MAU instance leaves
               the state available(3)."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.5, aLoseMediaCounter."
       ::= { ifMauEntry 6 }

   ifMauJabberState OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      unknown(2),
                      noJabber(3),
                      jabbering(4)
                  }
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The value other(1) is returned if the jabber
               state is not 2, 3, or 4.  The agent must always
               return other(1) for MAU type dot3MauTypeAUI.

               The value unknown(2) is returned when the MAU's
               true state is unknown; for example, when it is
               being initialized.

               If the MAU is not jabbering the agent returns
               noJabber(3).  This is the 'normal' state.

               If the MAU is in jabber state the agent returns
               the jabbering(4) value."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.6,
               aJabber.jabberFlag."
       ::= { ifMauEntry 7 }

   ifMauJabberingStateEnters OBJECT-TYPE
       SYNTAX     Counter32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A count of the number of times that
               mauJabberState for this MAU instance enters the
               state jabbering(4).  For MAUs of type
               dot3MauTypeAUI, dot3MauType100BaseT4,
               dot3MauType100BaseTX, and dot3MauType100BaseFX,
               this counter will always indicate zero."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.6,
               aJabber.jabberCounter."



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       ::= { ifMauEntry 8 }

   ifMauFalseCarriers OBJECT-TYPE
       SYNTAX     Counter32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A count of the number of false carrier events
               during IDLE in 100BASE-X links.  This counter does
               not increment at the symbol rate.  It can
               increment after a valid carrier completion at a
               maximum rate of once per 100 ms until the next
               carrier event.

               This counter increments only for MAUs of type
               dot3MauType100BaseT4, dot3MauType100BaseTX, and
               dot3MauType100BaseFX.  For all other MAU types,
               this counter will always indicate zero.

               The approximate minimum time for rollover of this
               counter is 7.4 hours."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.10, aFalseCarriers."
       ::= { ifMauEntry 9 }

   ifMauTypeList OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A value that uniquely identifies the set of
               possible IEEE 802.3 types that the MAU could be.
               The value is a sum which initially takes the value
               zero.  Then, for each type capability of this MAU,
               2 raised to the power noted below is added to the
               sum. For example, a MAU which has the capability
               to be only 10BASE-T would have a value of 512
               (2**9).  In contrast, a MAU which supports both
               10Base-T (full duplex) and 100BASE-TX (full
               duplex) would have a value of ((2**11) + (2**16))
               or 67584.

               The powers of 2 assigned to the capabilities are
               these:

               Power  Capability
                 0      other or unknown
                 1      AUI



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                 2      10BASE-5
                 3      FOIRL
                 4      10BASE-2
                 5      10BASE-T duplex mode unknown
                 6      10BASE-FP
                 7      10BASE-FB
                 8      10BASE-FL duplex mode unknown
                 9      10BROAD36
                10      10BASE-T  half duplex mode
                11      10BASE-T  full duplex mode
                12      10BASE-FL half duplex mode
                13      10BASE-FL full duplex mode
                14      100BASE-T4
                15      100BASE-TX half duplex mode
                16      100BASE-TX full duplex mode
                17      100BASE-FX half duplex mode
                18      100BASE-FX full duplex mode
                19      100BASE-T2 half duplex mode
                20      100BASE-T2 full duplex mode

               If auto-negotiation is present on this MAU, this
               object will map to ifMauAutoNegCapability."

       ::= { ifMauEntry 10 }

   ifMauDefaultType OBJECT-TYPE
       SYNTAX     OBJECT IDENTIFIER
       MAX-ACCESS read-write
       STATUS     current
       DESCRIPTION
               "This object identifies the default administrative
               10 or 100 Mb/s baseband MAU type, to be used in
               conjunction with the operational MAU type denoted
               by ifMauType.

               The set of possible values for this object is the
               same as the set defined for the ifMauType object.

               This object represents the administratively-
               configured type of the MAU.  If auto-negotiation
               is not enabled or is not implemented for this MAU,
               the value of this object determines the
               operational type of the MAU.  In this case, a set
               to this object will force the MAU into the
               specified operating mode.

               If auto-negotiation is implemented and enabled for
               this MAU, the operational type of the MAU is



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               determined by auto-negotiation, and the value of
               this object denotes the type to which the MAU will
               automatically revert if/when auto-negotiation is
               later disabled.

               NOTE TO IMPLEMENTORS:  It may be necessary to
               provide for underlying hardware implementations
               which do not follow the exact behavior specified
               above.  In particular, when
               ifMauAutoNegAdminStatus transitions from enabled
               to disabled, the agent implementation must ensure
               that the operational type of the MAU (as reported
               by ifMauType) correctly transitions to the value
               specified by this object, rather than continuing
               to operate at the value earlier determined by the
               auto-negotiation function."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.1.1, aMAUID, and [IEEE
               802.3 Std], 22.2.4.1.4."
       ::= { ifMauEntry 11 }

   ifMauAutoNegSupported OBJECT-TYPE
       SYNTAX     TruthValue
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This object indicates whether or not auto-
               negotiation is supported on this MAU."
       ::= { ifMauEntry 12 }



   -- The ifJackTable applies to MAUs attached to interfaces
   -- which have one or more external jacks (connectors).

   ifJackTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF IfJackEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "Information about the external jacks attached to
               MAUs attached to an interface."
       ::= { dot3IfMauBasicGroup 2 }

   ifJackEntry OBJECT-TYPE
       SYNTAX     IfJackEntry
       MAX-ACCESS not-accessible
       STATUS     current



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       DESCRIPTION
               "An entry in the table, containing information
               about a particular jack."
       INDEX    { ifMauIfIndex,
                  ifMauIndex,
                  ifJackIndex }
       ::= { ifJackTable 1 }

   IfJackEntry ::=
       SEQUENCE {
           ifJackIndex
               Integer32,
           ifJackType
               JackType
       }


   ifJackIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the jack
               described by this entry from among other jacks
               attached to the same MAU."
       ::= { ifJackEntry 1 }

   ifJackType OBJECT-TYPE
       SYNTAX     JackType
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The jack connector type, as it appears on the
               outside of the system."
       ::= { ifJackEntry 2 }


   -- The ifMauAutoNegTable applies to systems in which
   -- auto-negotiation is supported on one or more MAUs
   -- attached to interfaces.  Note that if auto-negotiation
   -- is present and enabled, the ifMauType object reflects
   -- the result of the auto-negotiation function.

   ifMauAutoNegTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF IfMauAutoNegEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION



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               "Configuration and status objects for the auto-
               negotiation function of MAUs attached to
               interfaces."
       ::= { dot3IfMauAutoNegGroup 1 }

   ifMauAutoNegEntry OBJECT-TYPE
       SYNTAX     IfMauAutoNegEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry in the table, containing configuration
               and status information for the auto-negotiation
               function of a particular MAU."
           INDEX     { ifMauIfIndex, ifMauIndex }
       ::= { ifMauAutoNegTable 1 }

   IfMauAutoNegEntry ::=
       SEQUENCE {
           ifMauAutoNegAdminStatus
               INTEGER,
           ifMauAutoNegRemoteSignaling
               INTEGER,
           ifMauAutoNegConfig
               INTEGER,
           ifMauAutoNegCapability
               Integer32,
           ifMauAutoNegCapAdvertised
               Integer32,
           ifMauAutoNegCapReceived
               Integer32,
           ifMauAutoNegRestart
               INTEGER

       }


   ifMauAutoNegAdminStatus OBJECT-TYPE
       SYNTAX     INTEGER {
                      enabled(1),
                      disabled(2)
                  }
       MAX-ACCESS read-write
       STATUS     current
       DESCRIPTION
               "Setting this object to enabled(1) will cause the
               interface which has the auto-negotiation signaling
               ability to be enabled.




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               If the value of this object is disabled(2) then
               the interface will act as it would if it had no
               auto-negotiation signaling.  Under these
               conditions, an IEEE 802.3 MAU will immediately be
               forced to the state indicated by the value of the
               object ifMauDefaultType.

               NOTE TO IMPLEMENTORS:  When
               ifMauAutoNegAdminStatus transitions from enabled
               to disabled, the agent implementation must ensure
               that the operational type of the MAU (as reported
               by ifMauType) correctly transitions to the value
               specified by the ifMauDefaultType object, rather
               than continuing to operate at the value earlier
               determined by the auto-negotiation function."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.6.1.1.2, aAutoNegAdminState
               and 30.6.1.2.2, acAutoNegAdminControl."
       ::= { ifMauAutoNegEntry 1 }

   ifMauAutoNegRemoteSignaling OBJECT-TYPE
       SYNTAX     INTEGER {
                      detected(1),
                      notdetected(2)
                  }
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A value indicating whether the remote end of the
               link is using auto-negotiation signaling. It takes
               the value detected(1) if and only if, during the
               previous link negotiation, FLP Bursts were
               received."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.6.1.1.3,
               aAutoNegRemoteSignaling."
       ::= { ifMauAutoNegEntry 2 }

   ifMauAutoNegConfig OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      configuring(2),
                      complete(3),
                      disabled(4),
                      parallelDetectFail(5)
                  }
       MAX-ACCESS read-only
       STATUS     current



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       DESCRIPTION
               "A value indicating the current status of the
               auto-negotiation process.  The enumeration
               parallelDetectFail(5) maps to a failure in
               parallel detection as defined in 28.2.3.1 of [IEEE
               802.3 Std]."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.6.1.1.4,
               aAutoNegAutoConfig."
       ::= { ifMauAutoNegEntry 4 }

   ifMauAutoNegCapability OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A value that uniquely identifies the set of
               capabilities of the local auto-negotiation entity.
               The value is a sum which initially takes the value
               zero.  Then, for each capability of this
               interface, 2 raised to the power noted below is
               added to the sum. For example, an interface which
               has the capability to support only 100Base-TX half
               duplex would have a value of 32768 (2**15).  In
               contrast, an interface which supports both
               100Base-TX half duplex and and 100Base-TX full
               duplex would have a value of 98304 ((2**15) +
               (2**16)).

               The powers of 2 assigned to the capabilities are
               these:

               Power   Capability
                 0       other or unknown
                (1-9)    (reserved)
                10       10BASE-T  half duplex mode
                11       10BASE-T  full duplex mode
                12       (reserved)
                13       (reserved)
                14       100BASE-T4
                15       100BASE-TX half duplex mode
                16       100BASE-TX full duplex mode
                17       (reserved)
                18       (reserved)
                19      100BASE-T2 half duplex mode
                20      100BASE-T2 full duplex mode

               Note that interfaces that support this MIB may



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               have capabilities that extend beyond the scope of
               this MIB."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.6.1.1.5,
               aAutoNegLocalTechnologyAbility."
       ::= { ifMauAutoNegEntry 5 }

   ifMauAutoNegCapAdvertised OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-write
       STATUS     current
       DESCRIPTION
               "A value that uniquely identifies the set of
               capabilities advertised by the local auto-
               negotiation entity. Refer to
               ifMauAutoNegCapability for a description of the
               possible values of this object.

               Capabilities in this object that are not available
               in ifMauAutoNegCapability cannot be enabled."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.6.1.1.6,
               aAutoNegAdvertisedTechnologyAbility."
       ::= { ifMauAutoNegEntry 6 }

   ifMauAutoNegCapReceived OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "A value that uniquely identifies the set of
               capabilities received from the remote auto-
               negotiation entity. Refer to
               ifMauAutoNegCapability for a description of the
               possible values of this object.

               Note that interfaces that support this MIB may be
               attached to remote auto-negotiation entities which
               have capabilities beyond the scope of this MIB."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.6.1.1.7,
               aAutoNegReceivedTechnologyAbility."
       ::= { ifMauAutoNegEntry 7 }

   ifMauAutoNegRestart OBJECT-TYPE
       SYNTAX     INTEGER {
                      restart(1),
                      norestart(2)



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                  }
       MAX-ACCESS read-write
       STATUS     current
       DESCRIPTION
               "If the value of this object is set to restart(1)
               then this will force auto-negotiation to begin
               link renegotiation. If auto-negotiation signaling
               is disabled, a write to this object has no effect.

               Setting the value of this object to norestart(2)
               has no effect."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.6.1.2.1,
               acAutoNegRestartAutoConfig."
       ::= { ifMauAutoNegEntry 8 }


   --
   -- The Basic Broadband MAU Table
   --

   broadMauBasicTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF BroadMauBasicEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "Table of descriptive and status information about
               the broadband MAUs connected to interfaces."
       ::= { dot3BroadMauBasicGroup 1 }

   broadMauBasicEntry OBJECT-TYPE
       SYNTAX     BroadMauBasicEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry in the table, containing information
               about a single broadband MAU."
       INDEX     { broadMauIfIndex, broadMauIndex }
       ::= { broadMauBasicTable 1 }

   BroadMauBasicEntry ::=
       SEQUENCE {
           broadMauIfIndex
               Integer32,
           broadMauIndex
               Integer32,
           broadMauXmtRcvSplitType
               INTEGER,



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           broadMauXmtCarrierFreq
               Integer32,
           broadMauTranslationFreq
               Integer32
       }

   broadMauIfIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the interface
               to which the MAU described by this entry is
               connected."
       REFERENCE
               "Reference <a href="./rfc1213">RFC 1213</a>, ifIndex."
       ::= { broadMauBasicEntry 1 }

   broadMauIndex OBJECT-TYPE
       SYNTAX     Integer32 (1..2147483647)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable uniquely identifies the MAU
               connected to interface broadMauIfIndex that is
               described by this entry."
       REFERENCE
               "Reference IEEE 802.3 MAU Mgt, 20.2.3.2, aMAUID."
       ::= { broadMauBasicEntry 2 }

   broadMauXmtRcvSplitType OBJECT-TYPE
       SYNTAX     INTEGER {
                      other(1),
                      single(2),
                      dual(3)
                  }
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This object indicates the type of frequency
               multiplexing/cabling system used to separate the
               transmit and receive paths for the 10BROAD36 MAU.

               The value other(1) is returned if the split type
               is not either single or dual.

               The value single(2) indicates a single cable
               system.  The value dual(3) indicates a dual cable



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               system, offset normally zero."
       REFERENCE
               "Reference IEEE 802.3 MAU Mgt, 20.2.3.2,
               aBbMAUXmitRcvSplitType."
       ::= { broadMauBasicEntry 3 }

   broadMauXmtCarrierFreq OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable indicates the transmit carrier
               frequency of the 10BROAD36 MAU in MHz/4; that is,
               in units of 250 kHz."
       REFERENCE
               "Reference IEEE 802.3 MAU Mgt, 20.2.3.2,
               aBroadbandFrequencies.xmitCarrierFrequency."
       ::= { broadMauBasicEntry 4 }

   broadMauTranslationFreq OBJECT-TYPE
       SYNTAX     Integer32
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "This variable indicates the translation offset
               frequency of the 10BROAD36 MAU in MHz/4; that is,
               in units of 250 kHz."
       REFERENCE
               "Reference IEEE 802.3 MAU Mgt, 20.2.3.2,
               aBroadbandFrequencies.translationFrequency."
       ::= { broadMauBasicEntry 5 }



   -- Notifications for use by 802.3 MAUs

   rpMauJabberTrap NOTIFICATION-TYPE
       OBJECTS     { rpMauJabberState }
       STATUS      current
       DESCRIPTION
               "This trap is sent whenever a managed repeater MAU
               enters the jabber state.

               The agent must throttle the generation of
               consecutive rpMauJabberTraps so that there is at
               least a five-second gap between them."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.3.1, nJabber



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               notification."
       ::= { snmpDot3MauMgt 0 1 }

   ifMauJabberTrap NOTIFICATION-TYPE
       OBJECTS     { ifMauJabberState }
       STATUS      current
       DESCRIPTION
               "This trap is sent whenever a managed interface
               MAU enters the jabber state.

               The agent must throttle the generation of
               consecutive ifMauJabberTraps so that there is at
               least a five-second gap between them."
       REFERENCE
               "[IEEE 802.3 Mgt], 30.5.1.3.1, nJabber
               notification."
       ::= { snmpDot3MauMgt 0 2 }


   -- Conformance information

   mauModConf
           OBJECT IDENTIFIER ::= { mauMod 1 }
     mauModCompls
           OBJECT IDENTIFIER ::= { mauModConf 1 }
     mauModObjGrps
           OBJECT IDENTIFIER ::= { mauModConf 2 }
     mauModNotGrps
           OBJECT IDENTIFIER ::= { mauModConf 3 }


   -- Object groups

   mauRpGrpBasic OBJECT-GROUP
       OBJECTS     { rpMauGroupIndex,
                     rpMauPortIndex,
                     rpMauIndex,
                     rpMauType,
                     rpMauStatus,
                     rpMauMediaAvailable,
                     rpMauMediaAvailableStateExits,
                     rpMauJabberState,
                     rpMauJabberingStateEnters }
       STATUS      current
       DESCRIPTION
           "Basic conformance group for MAUs attached to
           repeater ports.  This group is also the
           conformance specification for <a href="./rfc1515">RFC 1515</a>



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           implementations."
       ::= { mauModObjGrps 1 }

   mauRpGrp100Mbs OBJECT-GROUP
       OBJECTS     { rpMauFalseCarriers }
       STATUS      current
       DESCRIPTION
           "Conformance group for MAUs attached to
           repeater ports with 100 Mb/s capability."
       ::= { mauModObjGrps 2 }

   mauRpGrpJack OBJECT-GROUP
       OBJECTS     { rpJackType }
       STATUS      current
       DESCRIPTION
           "Conformance group for MAUs attached to
           repeater ports with managed jacks."
       ::= { mauModObjGrps 3 }

   mauIfGrpBasic OBJECT-GROUP
       OBJECTS     { ifMauIfIndex,
                     ifMauIndex,
                     ifMauType,
                     ifMauStatus,
                     ifMauMediaAvailable,
                     ifMauMediaAvailableStateExits,
                     ifMauJabberState,
                     ifMauJabberingStateEnters }
       STATUS      current
       DESCRIPTION
           "Basic conformance group for MAUs attached to
           interfaces.  This group also provides a
           conformance specification for <a href="./rfc1515">RFC 1515</a>
           implementations."
       ::= { mauModObjGrps 4 }

   mauIfGrp100Mbs OBJECT-GROUP
       OBJECTS     { ifMauFalseCarriers,
                     ifMauTypeList,
                     ifMauDefaultType,
                     ifMauAutoNegSupported }
       STATUS      current
       DESCRIPTION
           "Conformance group for MAUs attached
           to interfaces with 100 Mb/s capability."
       ::= { mauModObjGrps 5 }

   mauIfGrpJack OBJECT-GROUP



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       OBJECTS     { ifJackType }
       STATUS      current
       DESCRIPTION
           "Conformance group for MAUs attached
           to interfaces with managed jacks."
       ::= { mauModObjGrps 6 }

   mauIfGrpAutoNeg OBJECT-GROUP
       OBJECTS     { ifMauAutoNegAdminStatus,
                     ifMauAutoNegRemoteSignaling,
                     ifMauAutoNegConfig,
                     ifMauAutoNegCapability,
                     ifMauAutoNegCapAdvertised,
                     ifMauAutoNegCapReceived,
                     ifMauAutoNegRestart }
       STATUS      current
       DESCRIPTION
           "Conformance group for MAUs attached to
           interfaces with managed auto-negotiation."
       ::= { mauModObjGrps 7 }

   mauBroadBasic OBJECT-GROUP
       OBJECTS     { broadMauIfIndex,
                     broadMauIndex,
                     broadMauXmtRcvSplitType,
                     broadMauXmtCarrierFreq,
                     broadMauTranslationFreq }
       STATUS      current
       DESCRIPTION
           "Conformance group for broadband MAUs
           attached to interfaces.  This group
           provides a conformance specification
           for <a href="./rfc1515">RFC 1515</a> implementations."
       ::= { mauModObjGrps 8 }

   -- Notification groups

   rpMauNotifications NOTIFICATION-GROUP
       NOTIFICATIONS { rpMauJabberTrap }
       STATUS      current
       DESCRIPTION
           "Notifications for repeater MAUs."
       ::= { mauModNotGrps 1 }

   ifMauNotifications NOTIFICATION-GROUP
       NOTIFICATIONS { ifMauJabberTrap }
       STATUS      current
       DESCRIPTION



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           "Notifications for interface MAUs."
       ::= { mauModNotGrps 2 }


   -- Compliances

   mauModRpCompl MODULE-COMPLIANCE
       STATUS      current
       DESCRIPTION
           "Compliance for MAUs attached to repeater ports."

       MODULE -- this module
           MANDATORY-GROUPS { mauRpGrpBasic }

           GROUP mauRpGrp100Mbs
           DESCRIPTION
               "Implementation of this optional group is
               recommended for MAUs which have 100Mb/s
               capability."

           GROUP mauRpGrpJack
           DESCRIPTION
               "Implementation of this optional group is
               recommended for MAUs which have one or more
               external jacks."

           GROUP rpMauNotifications
           DESCRIPTION
               "Implementation of this group is
               recommended for MAUs attached to repeater
               ports."

       ::= { mauModCompls 1 }


   mauModIfCompl MODULE-COMPLIANCE
       STATUS      current
       DESCRIPTION
           "Compliance for MAUs attached to interfaces."

       MODULE -- this module
           MANDATORY-GROUPS { mauIfGrpBasic }

           GROUP mauIfGrp100Mbs
           DESCRIPTION
               "Implementation of this optional group is
               recommended for MAUs which have 100Mb/s
               capability."



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           GROUP mauIfGrpJack
           DESCRIPTION
               "Implementation of this optional group is
               recommended for MAUs which have one or more
               external jacks."

           GROUP mauIfGrpAutoNeg
           DESCRIPTION
               "Implementation of this group is
               mandatory for MAUs which support
               managed auto-negotiation."

           GROUP mauBroadBasic
           DESCRIPTION
               "Implementation of this group is
               mandatory for broadband MAUs."

           GROUP ifMauNotifications
           DESCRIPTION
               "Implementation of this group is
               recommended for MAUs attached to
               interfaces."

       ::= { mauModCompls 2 }

   END

<span class="h2"><a class="selflink" id="section-4" href="#section-4">4</a>.  Acknowledgements</span>

   This document was produced by the IETF Hub MIB Working Group, whose
   efforts were greatly advanced by the contributions of the following
   people:

        Chuck Black
        John Flick
        Jeff Johnson
        Leon Leong
        Mike Lui
        Dave Perkins
        Geoff Thompson
        Maurice Turcotte
        Paul Woodruff

   Special thanks as well to Dave Perkins for his excellent work on the
   SMICng compiler, which made it easy to take advantage of the latest
   SNMPv2 constructs in this MIB.





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<span class="grey"><a href="./rfc2239">RFC 2239</a>          Managed Objects for IEEE 802.3 MAUs      November 1997</span>


<span class="h2"><a class="selflink" id="section-5" href="#section-5">5</a>.  References</span>

   [<a id="ref-1">1</a>]  IEEE 802.3/ISO 8802-3 Information processing systems -
        Local area networks - Part 3:  Carrier sense multiple
        access with collision detection (CSMA/CD) access method
        and physical layer specifications, 1993.

   [<a id="ref-2">2</a>]  IEEE 802.3u-1995, "MAC Parameters, Physical Layer, Medium
        Attachment Units and Repeater for 100 Mb/s Operation,
        Type 100BASE-T," Sections <a href="#section-21">21</a> through <a href="#section-29">29</a>, Supplement to
        IEEE Std 802.3, October 26, 1995.

   [<a id="ref-3">3</a>]  IEEE 802.3u-1995, "10 &amp; 100 Mb/s Management," <a href="#section-30">Section 30</a>,
        Supplement to IEEE Std 802.3, October 26, 1995.

   [<a id="ref-4">4</a>]  de Graaf, K., D. Romascanu, D. McMaster and K.
        McCloghrie, "Definitions of Managed Objects for IEEE
        802.3 Repeater Devices using SMIv2", <a href="./rfc2108">RFC 2108</a>, February
        1997.

   [<a id="ref-5">5</a>]  McCloghrie, K. and M. Rose, Editors, "Management
        Information Base for Network Management of TCP/IP-based
        internets: MIB-II", STD 17, <a href="./rfc1213">RFC 1213</a>, March 1991.

   [<a id="ref-6">6</a>]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
        "Structure of Management Information for version 2 of the
        Simple Network Management Protocol (SNMPv2)", <a href="./rfc1902">RFC 1902</a>,
        January 1996.

   [<a id="ref-7">7</a>]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Textual
        Conventions for version 2 of the Simple Network Management
        Protocol (SNMPv2)", <a href="./rfc1903">RFC 1903</a>, January 1996.

   [<a id="ref-8">8</a>]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
        "Conformance Statements for version 2 of the Simple Network
        Management Protocol (SNMPv2)", <a href="./rfc1904">RFC 1904</a>, January 1996.

   [<a id="ref-9">9</a>]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol
        Operations for version 2 of the Simple Network Management
        Protocol (SNMPv2)", <a href="./rfc1905">RFC 1905</a>, January 1996.

   [<a id="ref-10">10</a>] Case, J., M. Fedor, M. Schoffstall and  J. Davin, "Simple
        Network Management Protocol", STD 15, <a href="./rfc1157">RFC 1157</a>, May 1990.

   [<a id="ref-11">11</a>] McMaster, D., K. McCloghrie and  S. Roberts, "Definitions of
        Managed Objects for IEEE 802.3 Medium Attachment Units
        (MAUs)", <a href="./rfc1515">RFC 1515</a>, September 1993.




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<span class="grey"><a href="./rfc2239">RFC 2239</a>          Managed Objects for IEEE 802.3 MAUs      November 1997</span>


<span class="h2"><a class="selflink" id="section-6" href="#section-6">6</a>.  Security Considerations</span>

   Certain management information defined in this MIB may be considered
   sensitive in some network environments.  Therefore, authentication of
   received SNMP requests and controlled access to management
   information should be employed in such environments.  The method for
   this authentication is a function of the SNMP Administrative
   Framework, and has not been expanded by this MIB.

   Several objects in this MIB allow write access.  Setting these
   objects can have a serious effect on the operation of the network,
   including enabling or disabling a MAU, changing a MAU's default type,
   enabling, disabling or restarting autonegotiation, or modifying the
   capabilities that a MAU advertizes during autonegotiation.  It is
   recommended that implementers seriously consider whether set
   operations should be allowed without providing, at a minimum,
   authentication of request origin.

<span class="h2"><a class="selflink" id="section-7" href="#section-7">7</a>.  Authors' Addresses</span>

   Kathryn de Graaf
   3Com Corporation
   118 Turnpike Rd.
   Southborough, MA 01772 USA

   Phone: (508)229-1627
   Fax:   (508)490-5882
   EMail: kdegraaf@isd.3com.com


   Dan Romascanu
   Madge Networks (Israel) Ltd.
   Atidim Technology Park, Bldg. 3
   Tel Aviv 61131, Israel

   Phone: 972-3-6458414, 6458458
   Fax:   972-3-6487146
   EMail: dromasca@madge.com


   Donna McMaster
   Cisco Systems Inc.
   170 West Tasman Drive
   San Jose, CA 95134

   Phone:: (408) 526-5260
   EMail: mcmaster@cisco.com




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<span class="grey"><a href="./rfc2239">RFC 2239</a>          Managed Objects for IEEE 802.3 MAUs      November 1997</span>


   Keith McCloghrie
   Cisco Systems Inc.
   170 West Tasman Drive
   San Jose, CA 95134

   Phone: (408) 526-5260
   EMail: kzm@cisco.com


   Sam Roberts
   Farallon Computing, Inc.
   2470 Mariner Square Loop
   Alameda, CA 94501-1010

   Phone:: (510) 814-5215
   EMail: sroberts@farallon.com



































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<span class="grey"><a href="./rfc2239">RFC 2239</a>          Managed Objects for IEEE 802.3 MAUs      November 1997</span>


<span class="h2"><a class="selflink" id="section-8" href="#section-8">8</a>.  Full Copyright Statement</span>

   Copyright (C) The Internet Society (1997).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
























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</pre>