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Network Working Group                                           J. Flick
Request for Comments: 2358                       Hewlett-Packard Company
Obsoletes: 1650                                               J. Johnson
Category: Standards Track                               RedBack Networks
                                                               June 1998


                   Definitions of Managed Objects for
                   the Ethernet-like Interface Types

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 (1998).  All Rights Reserved.

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   This memo obsoletes RFC 1650 "Definitions of Managed Objects for the
   Ethernet-like Interface Types using SMIv2".  This memo extends that
   specification by including management information useful for the
   management of 100 Mb/s Ethernet interfaces.

   Ethernet technology, as defined by the 802.3 Working Group of the
   IEEE, continues to evolve, with scalable increases in speed, new
   types of cabling and interfaces, and new features.  This evolution
   may require changes in the managed objects in order to reflect this
   new functionality.  This document, as with other documents issued by
   this working group, reflect a certain stage in the evolution of
   Ethernet technology.  In the future, this document might be revised,
   or new documents might be issued by the Ethernet Interfaces and Hub
   MIB Working Group, in order to reflect the evolution of Ethernet
   technology.










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Table of Contents

   1. Introduction ................................................    2
   2.  The SNMP Network Management Framework ......................    2
   2.1.  Object Definitions .......................................    3
   3.  Overview ...................................................    3
   3.1.  Relation to MIB-2 ........................................    4
   3.2.  Relation to the Interfaces MIB ...........................    4
   3.2.1.  Layering Model .........................................    4
   3.2.2.  Virtual Circuits .......................................    4
   3.2.3.  ifTestTable ............................................    5
   3.2.4.  ifRcvAddressTable ......................................    5
   3.2.5.  ifPhysAddress ..........................................    5
   3.2.6.  ifType .................................................    6
   3.2.7.  Specific Interface MIB Objects .........................    7
   3.3.  Relation to the 802.3 MAU MIB ............................   10
   3.4.  Mapping of IEEE 802.3 Managed Objects ....................   10
   4.  Definitions ................................................   11
   5.  Intellectual Property ......................................   34
   6.  Acknowledgements ...........................................   34
   7.  References .................................................   35
   8.  Security Considerations ....................................   36
   9.  Authors' Addresses .........................................   37
   A.  Change Log .................................................   38
   B.  Full Copyright Statement ...................................   39

1. Introduction

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it defines objects for managing ethernet-like
   interfaces.

   This memo also includes a MIB module.  This MIB module extends the
   list of managed objects specified in the earlier version of this MIB:
   RFC1650 [11].

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [13].

2.  The SNMP Network Management Framework

   The SNMP Network Management Framework consists of several components.
   For the purpose of this specification, the applicable components of
   the Framework are the SMI and related documents [2, 3, 4], which
   define the mechanisms used for describing and naming objects for the
   purpose of management.



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

2.1.  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) [1]
   defined in the SMI [2].  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 these object types represent attributes of an interface
   to an ethernet-like communications medium.  At present, ethernet-like
   media are identified by the following values of the ifType object in
   the Interfaces MIB [12]:

                             ethernetCsmacd(6)
                             iso88023Csmacd(7)
                                starLan(11)

   The definitions presented here are based on the IEEE 802.3 Layer
   Management Specification [5], as originally interpreted by Frank
   Kastenholz then of Interlan in [7].  Implementors of these MIB
   objects should note that the IEEE document explicitly describes (in
   the form of Pascal pseudocode) when, where, and how various MAC
   attributes are measured.  The IEEE document also describes the
   effects of MAC actions that may be invoked by manipulating instances
   of the MIB objects defined here.

   To the extent that some of the attributes defined in [5] are
   represented by previously defined objects in MIB-2 [16] or in the
   Interfaces MIB [12], such attributes are not redundantly represented
   by objects defined in this memo.  Among the attributes represented by
   objects defined in other memos are the number of octets transmitted
   or received on a particular interface, the number of frames
   transmitted or received on a particular interface, the promiscuous
   status of an interface, the MAC address of an interface, and
   multicast information associated with an interface.







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3.1.  Relation to MIB-2

   This section applies only when this MIB is used in conjunction with
   the "old" (RFC 1213) [16] interface group.

   The relationship between an ethernet-like interface and an interface
   in the context of the Internet-standard MIB is one-to-one.  As such,
   the value of an ifIndex object instance can be directly used to
   identify corresponding instances of the objects defined herein.

   For agents which implement the (now deprecated) ifSpecific object, an
   instance of that object that is associated with an ethernet-like
   interface has the OBJECT IDENTIFIER value:

              dot3    OBJECT IDENTIFER ::= { transmission 7 }

3.2.  Relation to the Interfaces MIB

   The Interface MIB [12] requires that any MIB which is an adjunct of
   the Interface MIB clarify specific areas within the Interface MIB.
   These areas were intentionally left vague in the Interface MIB to
   avoid over constraining the MIB, thereby precluding management of
   certain media-types.

   Section 3.3 of [12] enumerates several areas which a media-specific
   MIB must clarify.  Each of these areas is addressed in a following
   subsection.  The implementor is referred to [12] in order to
   understand the general intent of these areas.

3.2.1.  Layering Model

   This MIB does not provide for layering.  There are no sublayers.

   EDITOR'S NOTE:

   One could foresee the development of an 802.2 and enet-transceiver
   MIB.  They could be higher and lower sublayers, respectively.  All
   that THIS document should do is allude to the possibilities and urge
   the implementor to be aware of the possibility and that they may have
   requirements which supersede the requirements in this document.

3.2.2.  Virtual Circuits

   This medium does not support virtual circuits and this area is not
   applicable to this MIB.






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3.2.3.  ifTestTable

   This MIB defines two tests for media which are instrumented with this
   MIB; TDR and Loopback.  Implementation of these tests is not
   required.  Many common interface chips do not support one or both of
   these tests.

   These two tests are provided as a convenience, allowing a common
   method to invoke the test.

   Standard MIBs do not include objects in which to return the results
   of the TDR test.  Any needed objects MUST be provided in the vendor
   specific MIB.

   Note that the ifTestTable is now deprecated.  Work is underway to
   define a replacement MIB for system and interface testing.  It is
   expected that the tests defined in this document will be usable in
   this replacement MIB.

3.2.4.  ifRcvAddressTable

   This table contains all IEEE 802.3 addresses, unicast, multicast, and
   broadcast, for which this interface will receive packets and forward
   them up to a higher layer entity for local consumption.  The format
   of the address, contained in ifRcvAddressAddress, is the same as for
   ifPhysAddress.

   In the event that the interface is part of a MAC bridge, this table
   does not include unicast addresses which are accepted for possible
   forwarding out some other port.  This table is explicitly not
   intended to provide a bridge address filtering mechanism.

3.2.5.  ifPhysAddress

   This object contains the IEEE 802.3 address which is placed in the
   source-address field of any Ethernet, Starlan, or IEEE 802.3 frames
   that originate at this interface.  Usually this will be kept in ROM
   on the interface hardware.  Some systems may set this address via
   software.

   In a system where there are several such addresses the designer has a
   tougher choice.  The address chosen should be the one most likely to
   be of use to network management (e.g.  the address placed in ARP
   responses for systems which are primarily IP systems).

   If the designer truly can not chose, use of the factory- provided ROM
   address is suggested.




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   If the address can not be determined, an octet string of zero length
   should be returned.

   The address is stored in binary in this object.  The address is
   stored in "canonical" bit order, that is, the Group Bit is positioned
   as the low-order bit of the first octet.  Thus, the first byte of a
   multicast address would have the bit 0x01 set.

3.2.6.  ifType

   This MIB applies to interfaces which have any of the following ifType
   values:

                             ethernetCsmacd(6)
                             iso88023Csmacd(7)
                                starLan(11)

   It is RECOMMENDED that all Ethernet-like interfaces use an ifType of
   ethernetCsmacd(6) regardless of the speed that the interface is
   running or the link-layer encapsulation in use.  iso88023Csmacd(7)
   and starLan(11) are supported for backwards compatability.

   There are two other interface types defined in the IANAifType-MIB for
   100 Mbit Ethernet.  They are fastEther(62), and fastEtherFX(69).
   This document takes the position that an Ethernet is an Ethernet, and
   Ethernet interfaces SHOULD always have the same value of ifType.
   Information on the particular flavor of Ethernet that an interface is
   running is available from ifSpeed in the Interfaces MIB, and
   ifMauType in the 802.3 MAU MIB.  An Ethernet-like interface SHOULD
   NOT use the fastEther(62) or fastEtherFX(69) ifTypes.

   Interfaces with any of the supported ifType values map to the
   EtherLike-MIB in the same manner.  Which compliance statement an
   interface should implement is dependent on the maximum speed
   supported on the interface.  The EtherLike-MIB etherCompliance
   compliance statement applies to all Ethernet-like interfaces whose
   maximum supported speed is 10 Mbit/sec or less.  There are no
   implementation differences. Similarly, the EtherLike-MIB
   ether100MbsCompliance compliance statement applies to all Ethernet-
   like interfaces whose maximum supported speed is 100Mbit/sec.

   An interface that is capable of operating at 100Mbit/sec MUST
   implement the ether100MbsCompliance compliance statement, even if it
   is currently operating at a lower speed.  Counters in the
   ether100MbsCompliance compliance statement that only apply to 100
   Mbit interfaces would simply not increment when the interface is
   operating at a lower speed.




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3.2.7.  Specific Interface MIB Objects

   The following table provides specific implementation guidelines for
   applying the interface group objects to ethernet-like media.

     Object

     ifIndex                    Each ethernet-like interface is
                                represented by an ifEntry.  The
                                dot3StatsTable in this MIB module is
                                indexed by dot3StatsIndex. The interface
                                identified by a particular value of
                                dot3StatsIndex is the same interface as
                                identified by the same value of ifIndex.

     ifDescr                    Refer to [12].

     ifType                     Refer to section 3.2.6.

     ifMtu                      1500 octets.

     ifSpeed                    The current operational speed of the
                                interface in bits per second. For
                                current ethernet-like interfaces, this
                                will be equal to 1,000,000 (1 million),
                                10,000,000 (10 million), or 100,000,000
                                (100 million). If the interface
                                implements auto-negotiation,
                                auto-negotiation is enabled for this
                                interface, and the interface has not yet
                                negotiated to an operational speed, this
                                object SHOULD reflect the maximum speed
                                supported by the interface.  Note that
                                this object MUST NOT indicate a doubled
                                value when operating in full-duplex
                                mode.  It MUST indicate the correct
                                line speed regardless of the current
                                duplex mode.  The correct object to use
                                to determine the duplex mode of the
                                interface is the ifMauType object in the
                                802.3 MAU MIB.

     ifPhysAddress              Refer to section 3.2.5.

     ifAdminStatus              Write access is not required.  Support
                                for 'testing' is not required.





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     ifOperStatus               The operational state of the interface.
                                Support for 'testing' is not required.
                                The value 'dormant' has no meaning for
                                an ethernet-like interface.

     ifLastChange               Refer to [12].

     ifInOctets                 The number of octets in valid MAC frames
                                received on this interface, including
                                the MAC header and FCS.

     ifInUcastPkts              Refer to [12].

     ifInDiscards               Refer to [12].

     ifInErrors                 The sum for this interface of
                                dot3StatsAlignmentErrors,
                                dot3StatsFCSErrors,
                                dot3StatsFrameTooLongs,
                                dot3StatsInternalMacReceiveErrors and
                                dot3StatsSymbolErrors.

     ifInUnknownProtos          Refer to [12].

     ifOutOctets                The number of octets transmitted in
                                valid MAC frames on this interface,
                                including the MAC header and FCS.

     ifOutUcastPkts             Refer to [12].

     ifOutDiscards              Refer to [12].

     ifOutErrors                The sum for this interface of:
                                dot3StatsSQETestErrors,
                                dot3StatsLateCollisions,
                                dot3StatsExcessiveCollisions,
                                dot3StatsInternalMacTransmitErrors and
                                dot3StatsCarrierSenseErrors.

     ifName                     Locally-significant textual name for the
                                interface (e.g. lan0).

     ifInMulticastPkts          Refer to [12].

     ifInBroadcastPkts          Refer to [12].

     ifOutMulticastPkts         Refer to [12].




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     ifOutBroadcastPkts         Refer to [12].

     ifHCInOctets               64-bit versions of counters.  Required
     ifHCOutOctets              for ethernet-like interfaces that are
                                capable of operating at 20Mbit/sec or
                                faster, even if the interface is
                                currently operating at less than
                                20Mbit/sec.

     ifHCInUcastPkts            64-bit versions of packet counters.
     ifHCInMulticastPkts        Support for these counters is not
     ifHCInBroadcastPkts        required for the interface types
     ifHCOutUcastPkts           supported by this MIB.  They are only
     ifHCOutMulticastPkts       required for interfaces capable of
     ifHCOutBroadcastPkts       operating at 640Mbit/sec or faster.
                                Note that a future revision of this
                                document may support faster interfaces,
                                and therefore may require support for
                                these counters.

     ifLinkUpDownTrapEnable     Refer to [12].  Default is 'enabled'

     ifHighSpeed                The current operational speed of the
                                interface in millions of bits per
                                second. For current ethernet-like
                                interfaces, this will be equal to 1, 10,
                                or 100.  If the interface implements
                                auto-negotiation, auto-negotiation is
                                enabled for this interface, and the
                                interface has not yet negotiated to an
                                operational speed, this object SHOULD
                                reflect the maximum speed supported by
                                the interface. Note that this object
                                MUST NOT indicate a doubled value when
                                operating in full-duplex mode.  It MUST
                                indicate the correct line speed
                                regardless of the current duplex mode.
                                The correct object to use to determine
                                the duplex mode of the interface is the
                                ifMauType object in the 802.3 MAU MIB.

     ifPromiscuousMode          Refer to [12].

     ifConnectorPresent         This will normally be 'true'.

     ifAlias                    Refer to [12].

     ifCounterDiscontinuityTime Refer to [12].



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     ifStackHigherLayer         Refer to section 3.2.1.
     ifStackLowerLayer
     ifStackStatus

     ifRcvAddressAddress        Refer to section 3.2.4.
     ifRcvAddressStatus
     ifRcvAddressType

3.3.  Relation to the 802.3 MAU MIB

   Support for the mauModIfCompl compliance statement of the MAU-MIB
   [14] is REQUIRED for Ethernet-like interfaces.  This MIB is needed in
   order to allow applications to determine the current MAU type in use
   by the interface.  The MAU type indicates not only the media type in
   use, but also indicates whether the interface is operating in half-
   duplex or full-duplex mode.  Implementing this MIB module without
   implementing the MAU-MIB would leave applications with no standard
   way to determine the duplex mode of the interface.

3.4.  Mapping of IEEE 802.3 Managed Objects

   IEEE 802.3 Managed Object         Corresponding SNMP Object

   oMacEntity
    .aMACID                          dot3StatsIndex or
                                     IF-MIB - ifIndex
    .aFramesTransmittedOK            IF-MIB - ifOutUCastPkts +
                                              ifOutMulticastPkts +
                                              ifOutBroadcastPkts
    .aSingleCollisionFrames          dot3StatsSingleCollisionFrames
    .aMultipleCollisionFrames        dot3StatsMultipleCollisionFrames
    .aFramesReceivedOK               IF-MIB - ifInUcastPkts +
                                              ifInMulticastPkts +
                                              ifInBroadcastPkts
    .aFrameCheckSequenceErrors       dot3StatsFCSErrors
    .aAlignmentErrors                dot3StatsAlignmentErrors
    .aOctetsTransmittedOK            IF-MIB - ifOutOctets
    .aFramesWithDeferredXmissions    dot3StatsDeferredTransmissions
    .aLateCollisions                 dot3StatsLateCollisions
    .aFramesAbortedDueToXSColls      dot3StatsExcessiveCollisions
    .aFramesLostDueToIntMACXmitError dot3StatsInternalMacTransmitErrors
    .aCarrierSenseErrors             dot3StatsCarrierSenseErrors
    .aOctetsReceivedOK               IF-MIB - ifInOctets
    .aFramesLostDueToIntMACRcvError  dot3StatsInternalMacReceiveErrors
    .aPromiscuousStatus              IF-MIB - ifPromiscuousMode
    .aReadMulticastAddressList       IF-MIB - ifRcvAddressTable
    .aMulticastFramesXmittedOK       IF-MIB - ifOutMulticastPkts
    .aBroadcastFramesXmittedOK       IF-MIB - ifOutBroadcastPkts



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    .aMulticastFramesReceivedOK      IF-MIB - ifInMulticastPkts
    .aBroadcastFramesReceivedOK      IF-MIB - ifInBroadcastPkts
    .aFrameTooLongErrors             dot3StatsFrameTooLongs
    .aReadWriteMACAddress            IF-MIB - ifPhysAddress
    .aCollisionFrames                dot3CollFrequencies
    .acAddGroupAddress               IF-MIB - ifRcvAddressTable
    .acDeleteGroupAddress            IF-MIB - ifRcvAddressTable
    .acExecuteSelfTest               dot3TestLoopBack

   oPHYEntity
    .aSQETestErrors                  dot3StatsSQETestErrors
    .aSymbolErrorDuringCarrier       dot3StatsSymbolErrors


   The following IEEE 802.3 managed objects have been removed from this
   MIB module as a result of implementation feedback:

   oMacEntity
     .aFramesWithExcessiveDeferral
     .aInRangeLengthErrors
     .aOutOfRangeLengthField
     .aMACEnableStatus
     .aTransmitEnableStatus
     .aMulticastReceiveStatus
     .acInitializeMAC

   Please see [15] for the detailed reasoning on why these objects were
   removed.

4.  Definitions

   EtherLike-MIB DEFINITIONS ::= BEGIN

       IMPORTS
           MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
           Counter32, mib-2, transmission
               FROM SNMPv2-SMI
           MODULE-COMPLIANCE, OBJECT-GROUP
               FROM SNMPv2-CONF
           ifIndex, InterfaceIndex
               FROM IF-MIB;

       etherMIB MODULE-IDENTITY
           LAST-UPDATED "9806032150Z"  -- June 3, 1998
           ORGANIZATION "IETF 802.3 Hub MIB Working Group"
           CONTACT-INFO
               "WG E-mail: hubmib@hprnd.rose.hp.com
             To subscribe: hubmib-request@hprnd.rose.hp.com



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                    Chair: Dan Romascanu
                   Postal: LANNET Ltd.
                           Atidum Technology Park, Bldg. 3
                           Tel Aviv 61131
                           Israel
                      Tel: +972 3 645 8414
                   E-mail: dromasca@lannet.com

                  Editor: John Flick
                  Postal: Hewlett-Packard Company
                          8000 Foothills Blvd. M/S 5556
                          Roseville, CA 95747-5556
                          USA
                     Tel: +1 916 785 4018
                     Fax: +1 916 785 3583
                  E-mail: johnf@hprnd.rose.hp.com

                  Editor: Jeffrey Johnson
                  Postal: RedBack Networks
                          2570 North First Street, Suite 410
                          San Jose, CA, 95131
                          USA
                     Tel: +1 408 571 2699
                     Fax: +1 408 571 2698
                  E-Mail: jeff@redbacknetworks.com"

           DESCRIPTION "The MIB module to describe generic objects for
                       Ethernet-like network interfaces. This MIB is an
                       updated version of the Ethernet-like MIB in RFC
                       1650."

           REVISION    "9806032150Z"
           DESCRIPTION "Updated to include support for 100 Mb/sec
                       interfaces."

           REVISION    "9402030400Z"
           DESCRIPTION "Version published as RFC 1650."
           ::= { mib-2 35 }

       etherMIBObjects OBJECT IDENTIFIER ::= { etherMIB 1 }

       dot3    OBJECT IDENTIFIER ::= { transmission 7 }

       -- the Ethernet-like Statistics group

       dot3StatsTable OBJECT-TYPE
           SYNTAX     SEQUENCE OF Dot3StatsEntry
           MAX-ACCESS not-accessible



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           STATUS     current
           DESCRIPTION "Statistics for a collection of ethernet-like
                       interfaces attached to a particular system."
           ::= { dot3 2 }

       dot3StatsEntry OBJECT-TYPE
           SYNTAX     Dot3StatsEntry
           MAX-ACCESS not-accessible
           STATUS     current
           DESCRIPTION "Statistics for a particular interface to an
                       ethernet-like medium."
           INDEX       { dot3StatsIndex }
           ::= { dot3StatsTable 1 }

       Dot3StatsEntry ::=
           SEQUENCE {
               dot3StatsIndex                      InterfaceIndex,
               dot3StatsAlignmentErrors            Counter32,
               dot3StatsFCSErrors                  Counter32,
               dot3StatsSingleCollisionFrames      Counter32,
               dot3StatsMultipleCollisionFrames    Counter32,
               dot3StatsSQETestErrors              Counter32,
               dot3StatsDeferredTransmissions      Counter32,
               dot3StatsLateCollisions             Counter32,
               dot3StatsExcessiveCollisions        Counter32,
               dot3StatsInternalMacTransmitErrors  Counter32,
               dot3StatsCarrierSenseErrors         Counter32,
               dot3StatsFrameTooLongs              Counter32,
               dot3StatsInternalMacReceiveErrors   Counter32,
               dot3StatsEtherChipSet               OBJECT IDENTIFIER,
               dot3StatsSymbolErrors               Counter32
           }

       dot3StatsIndex OBJECT-TYPE
           SYNTAX      InterfaceIndex
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "An index value that uniquely identifies an
                       interface to an ethernet-like medium.  The
                       interface identified by a particular value of
                       this index is the same interface as identified
                       by the same value of ifIndex."
           ::= { dot3StatsEntry 1 }

       dot3StatsAlignmentErrors OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current



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           DESCRIPTION "A count of frames received on a particular
                       interface that are not an integral number of
                       octets in length and do not pass the FCS check.

                       The count represented by an instance of this
                       object is incremented when the alignmentError
                       status is returned by the MAC service to the
                       LLC (or other MAC user). Received frames for
                       which multiple error conditions obtain are,
                       according to the conventions of IEEE 802.3
                       Layer Management, counted exclusively according
                       to the error status presented to the LLC."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 2 }

       dot3StatsFCSErrors OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of frames received on a particular
                       interface that are an integral number of octets
                       in length but do not pass the FCS check.

                       The count represented by an instance of this
                       object is incremented when the frameCheckError
                       status is returned by the MAC service to the
                       LLC (or other MAC user). Received frames for
                       which multiple error conditions obtain are,
                       according to the conventions of IEEE 802.3
                       Layer Management, counted exclusively according
                       to the error status presented to the LLC."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 3 }

       dot3StatsSingleCollisionFrames OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of successfully transmitted frames on
                       a particular interface for which transmission
                       is inhibited by exactly one collision.

                       A frame that is counted by an instance of this
                       object is also counted by the corresponding
                       instance of either the ifOutUcastPkts,
                       ifOutMulticastPkts, or ifOutBroadcastPkts,
                       and is not counted by the corresponding
                       instance of the dot3StatsMultipleCollisionFrames



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                       object."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 4 }


       dot3StatsMultipleCollisionFrames OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of successfully transmitted frames on
                       a particular interface for which transmission
                       is inhibited by more than one collision.

                       A frame that is counted by an instance of this
                       object is also counted by the corresponding
                       instance of either the ifOutUcastPkts,
                       ifOutMulticastPkts, or ifOutBroadcastPkts,
                       and is not counted by the corresponding
                       instance of the dot3StatsSingleCollisionFrames
                       object."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 5 }


       dot3StatsSQETestErrors OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of times that the SQE TEST ERROR
                       message is generated by the PLS sublayer for a
                       particular interface. The SQE TEST ERROR
                       message is defined in section 7.2.2.2.4 of
                       ANSI/IEEE 802.3-1985 and its generation is
                       described in section 7.2.4.6 of the same
                       document."
           REFERENCE   "ANSI/IEEE Std 802.3-1985 Carrier Sense
                       Multiple Access with Collision Detection Access
                       Method and Physical Layer Specifications"
           ::= { dot3StatsEntry 6 }

       dot3StatsDeferredTransmissions OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of frames for which the first
                       transmission attempt on a particular interface
                       is delayed because the medium is busy.




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                       The count represented by an instance of this
                       object does not include frames involved in
                       collisions."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 7 }

       dot3StatsLateCollisions OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "The number of times that a collision is
                       detected on a particular interface later than
                       512 bit-times into the transmission of a
                       packet.

                       Five hundred and twelve bit-times corresponds
                       to 51.2 microseconds on a 10 Mbit/s system. A
                       (late) collision included in a count
                       represented by an instance of this object is
                       also considered as a (generic) collision for
                       purposes of other collision-related
                       statistics."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 8 }

       dot3StatsExcessiveCollisions OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of frames for which transmission on a
                       particular interface fails due to excessive
                       collisions."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 9 }

       dot3StatsInternalMacTransmitErrors OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of frames for which transmission on a
                       particular interface fails due to an internal
                       MAC sublayer transmit error. A frame is only
                       counted by an instance of this object if it is
                       not counted by the corresponding instance of
                       either the dot3StatsLateCollisions object, the
                       dot3StatsExcessiveCollisions object, or the
                       dot3StatsCarrierSenseErrors object.




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                       The precise meaning of the count represented by
                       an instance of this object is implementation-
                       specific.  In particular, an instance of this
                       object may represent a count of transmission
                       errors on a particular interface that are not
                       otherwise counted."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 10 }

       dot3StatsCarrierSenseErrors OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "The number of times that the carrier sense
                       condition was lost or never asserted when
                       attempting to transmit a frame on a particular
                       interface.

                       The count represented by an instance of this
                       object is incremented at most once per
                       transmission attempt, even if the carrier sense
                       condition fluctuates during a transmission
                       attempt."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 11 }

       -- { dot3StatsEntry 12 } is not assigned

       dot3StatsFrameTooLongs OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of frames received on a particular
                       interface that exceed the maximum permitted
                       frame size.

                       The count represented by an instance of this
                       object is incremented when the frameTooLong
                       status is returned by the MAC service to the
                       LLC (or other MAC user). Received frames for
                       which multiple error conditions obtain are,
                       according to the conventions of IEEE 802.3
                       Layer Management, counted exclusively according
                       to the error status presented to the LLC."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 13 }

       -- { dot3StatsEntry 14 } is not assigned



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       -- { dot3StatsEntry 15 } is not assigned

       dot3StatsInternalMacReceiveErrors OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of frames for which reception on a
                       particular interface fails due to an internal
                       MAC sublayer receive error. A frame is only
                       counted by an instance of this object if it is
                       not counted by the corresponding instance of
                       either the dot3StatsFrameTooLongs object, the
                       dot3StatsAlignmentErrors object, or the
                       dot3StatsFCSErrors object.
                       The precise meaning of the count represented by
                       an instance of this object is implementation-
                       specific.  In particular, an instance of this
                       object may represent a count of receive errors
                       on a particular interface that are not
                       otherwise counted."
           REFERENCE   "IEEE 802.3 Layer Management"
           ::= { dot3StatsEntry 16 }

       dot3StatsEtherChipSet OBJECT-TYPE
           SYNTAX      OBJECT IDENTIFIER
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "This object contains an OBJECT IDENTIFIER
                       which identifies the chipset used to
                       realize the interface. Ethernet-like
                       interfaces are typically built out of
                       several different chips. The MIB implementor
                       is presented with a decision of which chip
                       to identify via this object. The implementor
                       should identify the chip which is usually
                       called the Medium Access Control chip.
                       If no such chip is easily identifiable,
                       the implementor should identify the chip
                       which actually gathers the transmit
                       and receive statistics and error
                       indications. This would allow a
                       manager station to correlate the
                       statistics and the chip generating
                       them, giving it the ability to take
                       into account any known anomalies
                       in the chip."
           ::= { dot3StatsEntry 17 }




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       dot3StatsSymbolErrors OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "The number of times there was an invalid data
                       symbol when a valid carrier was present on a
                       particular interface.

                       The count represented by an instance of this
                       object is incremented at most once per carrier
                       event, even if multiple symbol errors occur
                       during the carrier event."
           REFERENCE   "IEEE 802.3u-1995 10 & 100 Mb/s Management"
           ::= { dot3StatsEntry 18 }

       -- the Ethernet-like Collision Statistics group

       -- Implementation of this group is optional; it is appropriate
       -- for all systems which have the necessary metering

       dot3CollTable OBJECT-TYPE
           SYNTAX      SEQUENCE OF Dot3CollEntry
           MAX-ACCESS  not-accessible
           STATUS      current
           DESCRIPTION "A collection of collision histograms for a
                       particular set of interfaces."
           ::= { dot3 5 }

       dot3CollEntry OBJECT-TYPE
           SYNTAX      Dot3CollEntry
           MAX-ACCESS  not-accessible
           STATUS      current
           DESCRIPTION "A cell in the histogram of per-frame
                       collisions for a particular interface.  An
                       instance of this object represents the
                       frequency of individual MAC frames for which
                       the transmission (successful or otherwise) on a
                       particular interface is accompanied by a
                       particular number of media collisions."
           INDEX       { ifIndex, dot3CollCount }
           ::= { dot3CollTable 1 }

       Dot3CollEntry ::=
           SEQUENCE {
               dot3CollCount        INTEGER,
               dot3CollFrequencies  Counter32
           }




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       -- { dot3CollEntry 1 } is no longer in use

       dot3CollCount OBJECT-TYPE
           SYNTAX      INTEGER (1..16)
           MAX-ACCESS  not-accessible
           STATUS      current
           DESCRIPTION "The number of per-frame media collisions for
                       which a particular collision histogram cell
                       represents the frequency on a particular
                       interface."
           ::= { dot3CollEntry 2 }


       dot3CollFrequencies OBJECT-TYPE
           SYNTAX      Counter32
           MAX-ACCESS  read-only
           STATUS      current
           DESCRIPTION "A count of individual MAC frames for which the
                       transmission (successful or otherwise) on a
                       particular interface occurs after the
                       frame has experienced exactly the number
                       of collisions in the associated
                       dot3CollCount object.

                       For example, a frame which is transmitted
                       on interface 77 after experiencing
                       exactly 4 collisions would be indicated
                       by incrementing only dot3CollFrequencies.77.4.
                       No other instance of dot3CollFrequencies would
                       be incremented in this example."
           ::= { dot3CollEntry 3 }

       --  802.3 Tests

       dot3Tests   OBJECT IDENTIFIER ::= { dot3 6 }

       dot3Errors  OBJECT IDENTIFIER ::= { dot3 7 }


       --  TDR Test

       dot3TestTdr OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The Time-Domain Reflectometry (TDR) test is
                       specific to ethernet-like interfaces of type
                       10Base5 and 10Base2.  The TDR value may be
                       useful in determining the approximate distance
                       to a cable fault.  It is advisable to repeat



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                       this test to check for a consistent resulting
                       TDR value, to verify that there is a fault.

                       A TDR test returns as its result the time
                       interval, measured in 10 MHz ticks or 100 nsec
                       units, between the start of TDR test
                       transmission and the subsequent detection of a
                       collision or deassertion of carrier.  On
                       successful completion of a TDR test, the result
                       is stored as the value of an appropriate
                       instance of an appropriate vendor specific MIB
                       object, and the OBJECT IDENTIFIER of that
                       instance is stored in the appropriate instance
                       of the appropriate test result code object
                       (thereby indicating where the result has been
                       stored)."
           ::= { dot3Tests 1 }

       -- Loopback Test

       dot3TestLoopBack OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "This test configures the MAC chip and executes
                       an internal loopback test of memory, data paths,
                       and the MAC chip logic.  This loopback test can
                       only be executed if the interface is offline.
                       Once the test has completed, the MAC chip should
                       be reinitialized for network operation, but it
                       should remain offline.

                       If an error occurs during a test, the
                       appropriate test result object will be set
                       to indicate a failure.  The two OBJECT
                       IDENTIFIER values dot3ErrorInitError and
                       dot3ErrorLoopbackError may be used to provided
                       more information as values for an appropriate
                       test result code object."
           ::= { dot3Tests 2 }

       dot3ErrorInitError OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "Couldn't initialize MAC chip for test."
           ::= { dot3Errors 1 }

       dot3ErrorLoopbackError OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "Expected data not received (or not received
                       correctly) in loopback test."



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           ::= { dot3Errors 2 }


       --  802.3 Hardware Chipsets

       -- The object dot3StatsEtherChipSet is provided to
       -- identify the MAC hardware used to communicate on an
       -- interface.  The following hardware chipsets are
       -- registered:

       dot3ChipSets          OBJECT IDENTIFIER ::= { dot3 8 }

       dot3ChipSetAMD        OBJECT IDENTIFIER ::= { dot3ChipSets 1 }

       dot3ChipSetAMD7990 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am7990 Local Area Network
                       Controller for Ethernet (LANCE)."
           ::= { dot3ChipSetAMD 1 }

       dot3ChipSetAMD79900 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79900 chip."
           ::= { dot3ChipSetAMD 2 }

       dot3ChipSetAMD79C940 OBJECT-IDENTITY

           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C940 Media Access Controller
                       for Ethernet (MACE)."
           ::= { dot3ChipSetAMD 3 }

       dot3ChipSetAMD79C90 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C90 CMOS Local Area Network
                       Controller for Ethernet (C-LANCE)."
           ::= { dot3ChipSetAMD 4 }

       dot3ChipSetAMD79C960 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C960 PCnet-ISA Single Chip
                       Ethernet Controller for ISA."
           ::= { dot3ChipSetAMD 5 }



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       dot3ChipSetAMD79C961 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C961 PCnet-ISA+ Single Chip
                       Plug & Play Full-Duplex Ethernet Controller
                       for ISA."
           ::= { dot3ChipSetAMD 6 }

       dot3ChipSetAMD79C961A OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C961A PCnet-ISA II Single Chip
                       Plug & Play Full-Duplex Ethernet Controller
                       for ISA."
           ::= { dot3ChipSetAMD 7 }

       dot3ChipSetAMD79C965 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C965 PCnet-32 Single Chip
                       Ethernet Controller for PCI."
           ::= { dot3ChipSetAMD 8 }

       dot3ChipSetAMD79C970 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C970 PCnet PCI Single Chip
                       Ethernet Controller for PCI Local Bus."

           ::= { dot3ChipSetAMD 9 }

       dot3ChipSetAMD79C970A OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices AM79C970A PCnet PCI II Single Chip
                       Full-Duplex Ethernet Controller for PCI Local
                       Bus."
           ::= { dot3ChipSetAMD 10 }

       dot3ChipSetAMD79C971 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C971 PCnet-FAST Single Chip
                       Full-Duplex 10/100 Mbps Ethernet Controller for
                       PCI Local Bus."
           ::= { dot3ChipSetAMD 11 }

       dot3ChipSetAMD79C972 OBJECT-IDENTITY



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           STATUS      current
           DESCRIPTION "The authoritative identifier for the Advanced
                       Micro Devices Am79C972 PCnet-FAST+ Enhanced
                       10/100 Mbps PCI Ethernet Controller with OnNow
                       Support."
           ::= { dot3ChipSetAMD 12 }

       dot3ChipSetIntel      OBJECT IDENTIFIER ::= { dot3ChipSets 2 }

       dot3ChipSetIntel82586 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Intel
                       82586 IEEE 802.3 Ethernet LAN Coprocessor."
           ::= { dot3ChipSetIntel 1 }

       dot3ChipSetIntel82596 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Intel
                       82596 High-Performance 32-Bit Local Area Network
                       Coprocessor."
           ::= { dot3ChipSetIntel 2 }

       dot3ChipSetIntel82595 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Intel
                       82595 High Integration Ethernet Controller."
           ::= { dot3ChipSetIntel 3 }

       dot3ChipSetIntel82557 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Intel
                       82557 Fast Ethernet PCI Bus Lan Controller."
           ::= { dot3ChipSetIntel 4 }

       dot3ChipSetIntel82558 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Intel
                       82558 Fast Ethernet PCI Bus LAN Controller with
                       Integrated PHY."
           ::= { dot3ChipSetIntel 5 }

       dot3ChipSetSeeq       OBJECT IDENTIFIER ::= { dot3ChipSets 3 }

       dot3ChipSetSeeq8003 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       8003 chip set."
           ::= { dot3ChipSetSeeq 1 }



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       dot3ChipSetSeeq80C03 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       80C03 Full-Duplex CMOS Ethernet Data Link
                       Controller (MAC)."
           ::= { dot3ChipSetSeeq 2 }

       dot3ChipSetSeeq84C30 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       4-Port 84C30 Full-Duplex CMOS Ethernet 10
                       MBit/Sec Data Link Controller (MAC)."
           ::= { dot3ChipSetSeeq 3 }

       dot3ChipSetSeeq8431 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       4-Port 8431 Full-Duplex CMOS Ethernet 10
                       MBit/Sec Data Link Controller (MAC)."
           ::= { dot3ChipSetSeeq 4 }

       dot3ChipSetSeeq80C300 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       80C300 Full-Duplex CMOS Ethernet 10/100
                       Mbit/Sec Data Link Controller (MAC)."
           ::= { dot3ChipSetSeeq 5 }

       dot3ChipSetSeeq84C300 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       4-Port 84C300 Fast Ethernet Controller (MAC)."
           ::= { dot3ChipSetSeeq 6 }

       dot3ChipSetSeeq84301 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       4-Port 84301 Fast Ethernet Controller (MAC)."
           ::= { dot3ChipSetSeeq 7 }

       dot3ChipSetSeeq84302 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the SEEQ
                       4-Port 84302 Fast Ethernet Controller (MAC)."
           ::= { dot3ChipSetSeeq 8 }

       dot3ChipSetSeeq8100 OBJECT-IDENTITY
           STATUS      current



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           DESCRIPTION "The authoritative identifier for the SEEQ
                       8100 Gigabit Ethernet Controller (MAC & PCS)."
           ::= { dot3ChipSetSeeq 9 }

       dot3ChipSetNational   OBJECT IDENTIFIER ::= { dot3ChipSets 4 }

       dot3ChipSetNational8390 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP8390 Network Interface
                       Controller."
           ::= { dot3ChipSetNational 1 }

       dot3ChipSetNationalSonic OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83932 Systems-Oriented Network
                       Interface Controller (SONIC)."
           ::= { dot3ChipSetNational 2 }

       dot3ChipSetNational83901 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83901 Serial Network Interface
                       Controller (SNIC)."
           ::= { dot3ChipSetNational 3 }

       dot3ChipSetNational83902 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83902 Serial Network Interface
                       Controller for Twisted Pair (ST-NIC)."
           ::= { dot3ChipSetNational 4 }

       dot3ChipSetNational83905 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83905 AT Local Area Network
                       Twisted-Pair Interface (AT/LANTIC)."
           ::= { dot3ChipSetNational 5 }

       dot3ChipSetNational83907 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83907 AT Twisted-Pair Enhanced
                       Coaxial Network Interface Controller
                       (AT/LANTIC II)."
           ::= { dot3ChipSetNational 6 }



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       dot3ChipSetNational83916 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83916 Systems-Oriented Network
                       Interface Controller (SONIC-16)."
           ::= { dot3ChipSetNational 7 }

       dot3ChipSetNational83934 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83934 Systems-Oriented Network
                       Interface Controller with Twisted Pair Interface
                       (SONIC-T)."
           ::= { dot3ChipSetNational 8 }

       dot3ChipSetNational83936 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the National
                       Semiconductor DP83936AVUL Full-Duplex Systems-
                       Oriented Network Interface Controller with
                       Twisted Pair Interface (SONIC-T)."
           ::= { dot3ChipSetNational 9 }

       dot3ChipSetFujitsu    OBJECT IDENTIFIER ::= { dot3ChipSets 5 }

       dot3ChipSetFujitsu86950 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Fujitsu
                       86950 chip."
           ::= { dot3ChipSetFujitsu 1 }

       dot3ChipSetFujitsu86960 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Fujitsu
                       MB86960 Network Interface Controller with
                       Encoder/Decoder (NICE)."
           ::= { dot3ChipSetFujitsu 2 }

       dot3ChipSetFujitsu86964 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Fujitsu
                       MB86964 Ethernet Controller with 10BASE-T
                       Tranceiver."
           ::= { dot3ChipSetFujitsu 3 }

       dot3ChipSetFujitsu86965A OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Fujitsu



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                       MB86965A EtherCoupler Single-Chip Ethernet
                       Controller."
           ::= { dot3ChipSetFujitsu 4 }

       dot3ChipSetFujitsu86965B OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Fujitsu
                       MB86965B EtherCoupler Single-Chip Ethernet
                       Controller (supports full-duplex)."
           ::= { dot3ChipSetFujitsu 5 }

       dot3ChipSetDigital    OBJECT IDENTIFIER ::= { dot3ChipSets 6 }

       dot3ChipSetDigitalDC21040 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Digital
                       Semiconductor DC21040 chip."
           ::= { dot3ChipSetDigital 1 }

       dot3ChipSetDigital21041 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Digital
                       Semiconductor 21041 PCI Ethernet LAN
                       Controller."
           ::= { dot3ChipSetDigital 2 }

       dot3ChipSetDigital21140 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Digital
                       Semiconductor 21140 PCI Fast Ethernet LAN
                       Controller."
           ::= { dot3ChipSetDigital 3 }

       dot3ChipSetDigital21143 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Digital
                       Semiconductor 21143 PCI/CardBus 10/100-Mb/s
                       Ethernet LAN Controller."
           ::= { dot3ChipSetDigital 4 }

       dot3ChipSetDigital21340 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Digital
                       Semiconductor 21340 10/100-MB/s managed buffered
                       port switch."
           ::= { dot3ChipSetDigital 5 }

       dot3ChipSetDigital21440 OBJECT-IDENTITY



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           STATUS      current
           DESCRIPTION "The authoritative identifier for the Digital
                       Semiconductor 21440 Multiport 10/100Mbps
                       Ethernet Controller."
           ::= { dot3ChipSetDigital 6 }

       dot3ChipSetDigital21540 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Digital
                       Semiconductor 21540 PCI/CardBus Ethernet LAN
                       Controller with Modem Interface."
           ::= { dot3ChipSetDigital 7 }

       dot3ChipSetTI         OBJECT IDENTIFIER ::= { dot3ChipSets 7 }

       dot3ChipSetTIE100 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Texas
                       Instruments TNETE100 ThunderLAN PCI Fast
                       Ethernet Controller."
           ::= { dot3ChipSetTI 1 }

       dot3ChipSetTIE110 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Texas
                       Instruments TNETE110 ThunderLAN PCI 10BASE-T
                       Ethernet Adapter."
           ::= { dot3ChipSetTI 2 }

       dot3ChipSetTIX3100 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Texas
                       Instruments TNETX3100 Desktop ThunderSWITCH
                       8/2."
           ::= { dot3ChipSetTI 3 }

       dot3ChipSetTIX3150 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Texas
                       Instruments TNETX3150 ThunderSWITCH 12/3."
           ::= { dot3ChipSetTI 4 }

       dot3ChipSetTIX3270 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Texas
                       Instruments TNETX3270 ThunderSWITCH 24/3."
           ::= { dot3ChipSetTI 5 }




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       dot3ChipSetToshiba    OBJECT IDENTIFIER ::= { dot3ChipSets 8 }

       dot3ChipSetToshibaTC35815F OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Toshiba
                       TC35815F PCI-Based 100/10Mbps Ethernet
                       Controller."
           ::= { dot3ChipSetToshiba 1 }

       dot3ChipSetLucent     OBJECT IDENTIFIER ::= { dot3ChipSets 9 }

       dot3ChipSetLucentATT1MX10 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Lucent
                       Technologies ATT1MX10 (Spinnaker) Quad MAC and
                       Tranceiver for Ethernet Frame Switching."
           ::= { dot3ChipSetLucent 1 }

       dot3ChipSetLucentLUC3M08 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Lucent
                       Technologies LUC3M08 Eight Ethernet MACs for
                       10/100 Mbits/s Frame Switching."
           ::= { dot3ChipSetLucent 2 }

       dot3ChipSetGalileo    OBJECT IDENTIFIER ::= { dot3ChipSets 10 }

       dot3ChipSetGalileoGT48001 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Galileo
                       Technology GT-48001A Switched Ethernet
                       Controller."
           ::= { dot3ChipSetGalileo 1 }

       dot3ChipSetGalileoGT48002 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Galileo
                       Technology GT-48002A Switched Fast Ethernet
                       Controller."
           ::= { dot3ChipSetGalileo 2 }

       dot3ChipSetGalileoGT48004 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Galileo
                       Technology GT-48004A Four Port Fast Ethernet
                       Switch for Multiport 10/100BASE-X Systems."
           ::= { dot3ChipSetGalileo 3 }




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       dot3ChipSetGalileoGT48207 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Galileo
                       Technology GT-48207 Low-Cost 10 Port Switched
                       Ethernet Controller for 10+10/100BASE-X."
           ::= { dot3ChipSetGalileo 4 }

       dot3ChipSetGalileoGT48208 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Galileo
                       Technology GT-48208 Advanced 10 Port Switched
                       Ethernet Controller for 10+10/100BASE-X."
           ::= { dot3ChipSetGalileo 5 }

       dot3ChipSetGalileoGT48212 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Galileo
                       Technology GT-48212 Advanced 14 Port Switched
                       Ethernet Controller for 10+10/100BASE-X."
           ::= { dot3ChipSetGalileo 6 }

       dot3ChipSetJato       OBJECT IDENTIFIER ::= { dot3ChipSets 11 }

       dot3ChipSetJatoJT1001 OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the Jato
                       Technologies JT1001 GigEMAC Server
                       10/100/1000Mbps Ethernet Controller with PCI
                       interface."
           ::= { dot3ChipSetJato 1 }

       dot3ChipSetXaQti      OBJECT IDENTIFIER ::= { dot3ChipSets 12 }

       dot3ChipSetXaQtiXQ11800FP OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the XaQTI
                       XQ11800FP XMAC II Gigabit Ethernet Media Access
                       Controller."
           ::= { dot3ChipSetXaQti 1 }

       dot3ChipSetXaQtiXQ18110FP OBJECT-IDENTITY
           STATUS      current
           DESCRIPTION "The authoritative identifier for the XaQTI
                       XQ18110FP GigaPower Protocol Accelerator."
           ::= { dot3ChipSetXaQti 2 }

       -- For those chipsets not represented above, OBJECT IDENTIFIER
       -- assignment is required in other documentation, e.g.,



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       -- assignment within that part of the registration tree
       -- delegated to individual enterprises (see RFC 1155 and
       -- RFC 1902).
       --
       -- In the future, management of chipset registrations may be
       -- delegated to the Internet Assigned Numbers Authority (IANA).

       -- conformance information

       etherConformance OBJECT IDENTIFIER ::= { etherMIB 2 }

       etherGroups      OBJECT IDENTIFIER ::= { etherConformance 1 }
       etherCompliances OBJECT IDENTIFIER ::= { etherConformance 2 }


       -- compliance statements

       etherCompliance MODULE-COMPLIANCE
           STATUS      current
           DESCRIPTION "The compliance statement for managed network
                       entities which have ethernet-like network
                       interfaces."

           MODULE  -- this module
               MANDATORY-GROUPS { etherStatsGroup }

               GROUP       etherCollisionTableGroup
               DESCRIPTION "This group is optional. It is appropriate
                           for all systems which have the necessary
                           metering. Implementation in such systems is
                           highly recommended."
           ::= { etherCompliances 1 }

       ether100MbsCompliance MODULE-COMPLIANCE
           STATUS      current
           DESCRIPTION "The compliance statement for managed network
                       entities which have 100 Mb/sec ethernet-like
                       network interfaces."

           MODULE  -- this module
               MANDATORY-GROUPS { etherStats100MbsGroup }

               GROUP       etherCollisionTableGroup
               DESCRIPTION "This group is optional. It is appropriate
                           for all systems which have the necessary
                           metering. Implementation in such systems is
                           highly recommended."
           ::= { etherCompliances 2 }



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       -- units of conformance

       etherStatsGroup OBJECT-GROUP
           OBJECTS     { dot3StatsIndex,
                         dot3StatsAlignmentErrors,
                         dot3StatsFCSErrors,
                         dot3StatsSingleCollisionFrames,
                         dot3StatsMultipleCollisionFrames,
                         dot3StatsSQETestErrors,
                         dot3StatsDeferredTransmissions,
                         dot3StatsLateCollisions,
                         dot3StatsExcessiveCollisions,
                         dot3StatsInternalMacTransmitErrors,
                         dot3StatsCarrierSenseErrors,
                         dot3StatsFrameTooLongs,
                         dot3StatsInternalMacReceiveErrors,
                         dot3StatsEtherChipSet
                       }
           STATUS      current
           DESCRIPTION "A collection of objects providing information
                       applicable to all ethernet-like network
                       interfaces."
           ::= { etherGroups 1 }


       etherCollisionTableGroup OBJECT-GROUP
           OBJECTS     { dot3CollFrequencies
                       }
           STATUS      current
           DESCRIPTION "A collection of objects providing a histogram
                       of packets successfully transmitted after
                       experiencing exactly N collisions."
           ::= { etherGroups 2 }


       etherStats100MbsGroup OBJECT-GROUP
           OBJECTS     { dot3StatsIndex,
                         dot3StatsAlignmentErrors,
                         dot3StatsFCSErrors,
                         dot3StatsSingleCollisionFrames,
                         dot3StatsMultipleCollisionFrames,
                         dot3StatsDeferredTransmissions,
                         dot3StatsLateCollisions,
                         dot3StatsExcessiveCollisions,
                         dot3StatsInternalMacTransmitErrors,
                         dot3StatsCarrierSenseErrors,
                         dot3StatsFrameTooLongs,
                         dot3StatsInternalMacReceiveErrors,



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                         dot3StatsEtherChipSet,
                         dot3StatsSymbolErrors
                       }
           STATUS      current
           DESCRIPTION "A collection of objects providing information
                       applicable to 100 Mb/sec ethernet-like network
                       interfaces."
           ::= { etherGroups 3 }


   END

5.  Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   intellectual property or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; neither does it represent that it
   has made any effort to identify any such rights.  Information on the
   IETF's procedures with respect to rights in standards-track and
   standards-related documentation can be found in BCP-11.  Copies of
   claims of rights made available for publication and any assurances of
   licenses to be made available, or the result of an attempt made to
   obtain a general license or permission for the use of such
   proprietary rights by implementors or users of this specification can
   be obtained from the IETF Secretariat.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights which may cover technology that may be required to practice
   this standard.  Please address the information to the IETF Executive
   Director.

6.  Acknowledgements

   This document was produced by the 802.3 Hub MIB Working Group.

   This document is almost completely based on both the Standard
   Ethernet MIB, RFC 1643 [10], and the Proposed Standard Ethernet MIB
   using the SNMPv2 SMI, RFC 1650 [11], both of which were edited by
   Frank Kastenholz of FTP Software and produced by the Ethernet MIB
   Working Group.  This document extends those documents by providing
   support for 100 Mb/sec ethernet interfaces as outlined in [6].

   RFC 1643 and RFC 1650, in turn, are based on the Draft Standard
   Ethernet MIB, RFC 1398 [9], also edited by Frank Kastenholz and
   produced by the Ethernet MIB Working Group.



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   RFC 1398, in turn, is based on the Proposed Standard Ethernet MIB,
   RFC 1284 [8], which was edited by John Cook of Chipcom and produced
   by the Transmission MIB Working Group.  The Ethernet MIB Working
   Group gathered implementation experience of the variables specified
   in RFC 1284 and used that information to develop this revised MIB.

   RFC 1284, in turn, is based on a document written by Frank
   Kastenholz, then of Interlan, entitled IEEE 802.3 Layer Management
   Draft M compatible MIB for TCP/IP Networks [7].  This document has
   been modestly reworked, initially by the SNMP Working Group, and then
   by the Transmission Working Group, to reflect the current conventions
   for defining objects for MIB interfaces.  James Davin, of the MIT
   Laboratory for Computer Science, and Keith McCloghrie of Hughes LAN
   Systems, contributed to later drafts of this memo. Marshall Rose of
   Performance Systems International, Inc. converted the document into
   its current concise format. Anil Rijsinghani of DEC contributed text
   that more adequately describes the TDR test.  Thanks to Frank
   Kastenholz of Interlan and Louis Steinberg of IBM for their
   experimentation.

7.  References

   [1] Information processing systems - Open Systems Interconnection -
       Specification of Abstract Syntax Notation One (ASN.1),
       International Organization for Standardization, International
       Standard 8824, December 1987.

   [2] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and S.
       Waldbusser, "Structure of Management Information for Version 2 of
       the Simple Network Management Protocol (SNMPv2)", RFC 1902,
       January 1996.

   [3] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and S.
       Waldbusser, "Textual Conventions for Version 2 of the Simple
       Network Management Protocol (SNMPv2)", RFC 1903, January 1996.

   [4] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M., and S.
       Waldbusser, "Conformance Statements for Version 2 of the Simple
       Network Management Protocol (SNMPv2)", RFC 1904, January 1996.

   [5] IEEE, IEEE 802.3 Layer Management, November 1988.

   [6] IEEE, IEEE 802.3u-1995, "10 & 100 Mb/s Management," Section 30,
       Supplement to IEEE Std 802.3, October 26, 1995.

   [7] Kastenholz, F., "IEEE 802.3 Layer Management Draft compatible MIB
       for TCP/IP Networks", electronic mail message to mib-
       wg@nnsc.nsf.net, 9 June 1989.



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   [8] Cook, J., "Definitions of Managed Objects for Ethernet-Like
       Interface Types", RFC 1284, December 1991.

   [9] Kastenholz, F., "Definitions of Managed Objects for the
       Ethernet-like Interface Types", RFC 1398, January 1993.

  [10] Kastenholz, F., "Definitions of Managed Objects for the
       Ethernet-like Interface Types", RFC 1643, July 1994.

  [11] Kastenholz, F., "Definitions of Managed Objects for the
       Ethernet-like Interface Types using SMIv2", RFC 1650, August
       1994.

  [12] McCloghrie, K., and F. Kastenholz, "The Interfaces Group MIB
       using SMIv2", RFC 2233, Cisco Systems, November 1997.

  [13] Bradner, S., "Key words for use in RFCs to Indicate Requirements
       Levels", BCP 14, RFC 2119, March 1997.

  [14] deGraaf, K., Romascanu, D., McMaster, D., McCloghrie, K., and S.
       Roberts, "Definitions of Managed Objects for IEEE 802.3 Medium
       Attachment Units (MAUs) using SMIv2", RFC 2239, November 1997.

  [15] Kastenholz, F., "Implementation Notes and Experience for The
       Internet Ethernet MIB", RFC 1369, October 1992.

  [16] McCloghrie, K., and M. Rose, Editors, "Management Information
       Base for Network Management of TCP/IP-based internets: MIB-II",
       STD 17, RFC 1213, March 1991.

  [17] Blumenthal, U., and B. Wijnen, "User-based Security Model (USM)
       for version 3 of the Simple Network Management Protocol
       (SNMPv3)", RFC 2274, January 1998.

  [18] Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based Access
       Control Model for the Simple Network Management Protocol (SNMP)",
       RFC 2275, January 1998.

8.  Security Considerations

   There are no management objects defined in this MIB that have a MAX-
   ACCESS clause of read-write and/or read-create.  So, if this MIB is
   implemented correctly, then there is no risk that an intruder can
   alter or create any management objects of this MIB via direct SNMP
   SET operations.






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   There are a number of managed objects in this MIB that may be
   considered to contain sensitive information.  In particular, the
   dot3StatsEtherChipSet object may be considered sensitive in many
   environments, since it would allow an intruder to obtain information
   about which vendor's equipment is in use on the network.

   Therefore, it may be important in some environments to control read
   access to these objects and possibly to even encrypt the values of
   these object when sending them over the network via SNMP.  Not all
   versions of SNMP provide features for such a secure environment.

   SNMPv1 by itself is such an insecure environment.  Even if the
   network itself is secure (for example by using IPSec), even then,
   there is no control as to who on the secure network is allowed to
   access and GET (read) the objects in this MIB.

   It is recommended that the implementors consider the security
   features as provided by the SNMPv3 framework.  Specifically, the use
   of the User-based Security Model RFC 2274 [17] and the View-based
   Access Control Model RFC 2275 [18] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to an instance of this MIB, is properly
   configured to give access to those objects only to those principals
   (users) that have legitimate rights to access them.

9.  Authors' Addresses

   John Flick
   Hewlett-Packard Company
   8000 Foothills Blvd. M/S 5556
   Roseville, CA 95747-5556

   Phone: +1 916 785 4018
   EMail: johnf@hprnd.rose.hp.com


   Jeffrey Johnson
   RedBack Networks
   2570 North First Street, Suite 410
   San Jose, CA, 95131, USA

   Phone: +1 408 571 2699
   EMail: jeff@redbacknetworks.com







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A.  Change Log

   This section enumerates changes made to RFC 1650 to produce this
   document.

      (1)   The MODULE-IDENTITY has been updated to reflect the changes
            in the MIB.

      (2)   A new object, dot3StatsSymbolErrors, has been added.

      (3)   The definition of the object dot3StatsIndex has been
            converted to use the SMIv2 OBJECT-TYPE macro.

      (4)   A new conformance group, etherStats100MbsGroup, has been
            added.

      (5)   A new compliance statement, ether100MbsCompliance, has
            been added.

      (6)   The Acknowledgements were extended to provide a more
            complete history of the origin of this document.

      (7)   The discussion of ifType has been expanded.

      (8)   A section on mapping of Interfaces MIB objects has
            been added.

      (9)   A section defining the relationship of this MIB to
            the MAU MIB has been added.

      (10)  A section on the mapping of IEEE 802.3 managed objects
            to this MIB and the Interfaces MIB has been added.

      (11)  Converted the dot3Tests, dot3Errors, and dot3ChipSets
            OIDs to use the OBJECT-IDENTITY macro.

      (12)  Added to the list of registered dot3ChipSets.

      (13)  An intellectual property notice and copyright notice
            were added, as required by RFC 2026.











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B.  Full Copyright Statement

   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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