EtherLike-MIB DEFINITIONS ::= BEGIN

    IMPORTS

        MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,

        Integer32, Counter32, Counter64, mib-2, transmission

            FROM SNMPv2-SMI

        MODULE-COMPLIANCE, OBJECT-GROUP

            FROM SNMPv2-CONF

        TruthValue

            FROM SNMPv2-TC

        ifIndex, InterfaceIndex

            FROM IF-MIB;

    etherMIB MODULE-IDENTITY

        LAST-UPDATED "200309190000Z"  -- September 19, 2003

        ORGANIZATION "IETF Ethernet Interfaces and Hub MIB

                     Working Group"

        CONTACT-INFO

            "WG E-mail: hubmib@ietf.org

          To subscribe: hubmib-request@ietf.org

                 Chair: Dan Romascanu

                Postal: Avaya Inc.

                        Atidum Technology Park, Bldg. 3

                        Tel Aviv 61131

                        Israel

                   Tel: +972 3 645 8414

                E-mail: dromasca@avaya.com

               Editor: John Flick

               Postal: Hewlett-Packard Company

                       8000 Foothills Blvd. M/S 5557

                       Roseville, CA 95747-5557

                       USA

                  Tel: +1 916 785 4018

                  Fax: +1 916 785 1199

               E-mail: johnf@rose.hp.com"

        DESCRIPTION "The MIB module to describe generic objects for

                    ethernet-like network interfaces.

                    The following reference is used throughout this

                    MIB module:

                    [IEEE 802.3 Std] refers to:

                       IEEE Std 802.3, 2002 Edition: 'IEEE Standard

                       for Information technology -

                       Telecommunications and information exchange

                       between systems - Local and metropolitan

                       area networks - Specific requirements -

                       Part 3: Carrier sense multiple access with

                       collision detection (CSMA/CD) access method

                       and physical layer specifications', as

                       amended by IEEE Std 802.3ae-2002:

                       'Amendment: Media Access Control (MAC)

                       Parameters, Physical Layer, and Management

                       Parameters for 10 Gb/s Operation', August,

                       2002.

                    Of particular interest is Clause 30, '10 Mb/s,

                    100 Mb/s, 1000 Mb/s, and 10 Gb/s Management'.

                    Copyright (C) The Internet Society (2003).  This

                    version of this MIB module is part of RFC 3635;

                    see the RFC itself for full legal notices."

        REVISION    "200309190000Z"  -- September 19, 2003

        DESCRIPTION "Updated to include support for 10 Gb/sec

                     interfaces.  This resulted in the following

                     revisions:

                     - Updated dot3StatsAlignmentErrors and

                       dot3StatsSymbolErrors DESCRIPTIONs to

                       reflect behaviour at 10 Gb/s

                     - Added dot3StatsRateControlAbility and

                       dot3RateControlStatus for management

                       of the Rate Control function in 10 Gb/s

                       WAN applications

                     - Added 64-bit versions of all counters

                       that are used on high-speed ethernet

                       interfaces

                     - Added object groups to contain the new

                       objects

                     - Deprecated etherStatsBaseGroup and

                       split into etherStatsBaseGroup2 and

                       etherStatsHalfDuplexGroup, so that

                       interfaces which can only operate at

                       full-duplex do not need to implement

                       half-duplex-only statistics

                     - Deprecated dot3Compliance and replaced

                       it with dot3Compliance2, which includes

                       the compliance information for the new

                       object groups

                     In addition, the dot3Tests and dot3Errors

                     object identities have been deprecated,

                     since there is no longer a standard method

                     for using them.

                     This version published as RFC 3635."

        REVISION    "199908240400Z"  -- August 24, 1999

        DESCRIPTION "Updated to include support for 1000 Mb/sec

                     interfaces and full-duplex interfaces.

                     This version published as RFC 2665."

        REVISION    "199806032150Z"  -- June 3, 1998

        DESCRIPTION "Updated to include support for 100 Mb/sec

                     interfaces.

                     This version published as RFC 2358."

        REVISION    "199402030400Z"  -- February 3, 1994

        DESCRIPTION "Initial 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

        STATUS     current

        DESCRIPTION "Statistics for a collection of ethernet-like

                    interfaces attached to a particular system.

                    There will be one row in this table for each

                    ethernet-like interface in the 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,

            dot3StatsDuplexStatus               INTEGER,

            dot3StatsRateControlAbility         TruthValue,

            dot3StatsRateControlStatus          INTEGER

        }

    dot3StatsIndex OBJECT-TYPE

        SYNTAX      InterfaceIndex

        MAX-ACCESS  read-only  -- read-only since originally an

                               -- SMIv1 index

        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."

        REFERENCE   "RFC 2863, ifIndex"

        ::= { dot3StatsEntry 1 }

    dot3StatsAlignmentErrors OBJECT-TYPE

        SYNTAX      Counter32

        MAX-ACCESS  read-only

        STATUS      current

        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 pertain are,

                    according to the conventions of IEEE 802.3

                    Layer Management, counted exclusively according

                    to the error status presented to the LLC.

                    This counter does not increment for group

                    encoding schemes greater than 4 bits per group.

                    For interfaces operating at 10 Gb/s, this

                    counter can roll over in less than 5 minutes if

                    it is incrementing at its maximum rate.  Since

                    that amount of time could be less than a

                    management station's poll cycle time, in order

                    to avoid a loss of information, a management

                    station is advised to poll the

                    dot3HCStatsAlignmentErrors object for 10 Gb/s

                    or faster interfaces.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.7,

                    aAlignmentErrors"

        ::= { 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.  This

                    count does not include frames received with

                    frame-too-long or frame-too-short error.

                    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 pertain are,

                    according to the conventions of IEEE 802.3

                    Layer Management, counted exclusively according

                    to the error status presented to the LLC.

                    Note:  Coding errors detected by the physical

                    layer for speeds above 10 Mb/s will cause the

                    frame to fail the FCS check.

                    For interfaces operating at 10 Gb/s, this

                    counter can roll over in less than 5 minutes if

                    it is incrementing at its maximum rate.  Since

                    that amount of time could be less than a

                    management station's poll cycle time, in order

                    to avoid a loss of information, a management

                    station is advised to poll the

                    dot3HCStatsFCSErrors object for 10 Gb/s or

                    faster interfaces.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.6,

                    aFrameCheckSequenceErrors."

        ::= { dot3StatsEntry 3 }

    dot3StatsSingleCollisionFrames OBJECT-TYPE

        SYNTAX      Counter32

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "A count of frames that are involved in a single

                    collision, and are subsequently transmitted

                    successfully.

                    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

                    object.

                    This counter does not increment when the

                    interface is operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.3,

                    aSingleCollisionFrames."

        ::= { dot3StatsEntry 4 }

    dot3StatsMultipleCollisionFrames OBJECT-TYPE

        SYNTAX      Counter32

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "A count of frames that are involved in more

                    than one collision and are subsequently

                    transmitted successfully.

                    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.

                    This counter does not increment when the

                    interface is operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.4,

                    aMultipleCollisionFrames."

        ::= { dot3StatsEntry 5 }

    dot3StatsSQETestErrors OBJECT-TYPE

        SYNTAX      Counter32

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "A count of times that the SQE TEST ERROR

                    is received on a particular interface. The

                    SQE TEST ERROR is set in accordance with the

                    rules for verification of the SQE detection

                    mechanism in the PLS Carrier Sense Function as

                    described in IEEE Std. 802.3, 2000 Edition,

                    section 7.2.4.6.

                    This counter does not increment on interfaces

                    operating at speeds greater than 10 Mb/s, or on

                    interfaces operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 7.2.4.6, also 30.3.2.1.4,

                    aSQETestErrors."

        ::= { 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.

                    The count represented by an instance of this

                    object does not include frames involved in

                    collisions.

                    This counter does not increment when the

                    interface is operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.9,

                    aFramesWithDeferredXmissions."

        ::= { 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

                    one slotTime into the transmission of a packet.

                    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.

                    This counter does not increment when the

                    interface is operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.10,

                    aLateCollisions."

        ::= { 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.

                    This counter does not increment when the

                    interface is operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.11,

                    aFramesAbortedDueToXSColls."

        ::= { 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.

                    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.

                    For interfaces operating at 10 Gb/s, this

                    counter can roll over in less than 5 minutes if

                    it is incrementing at its maximum rate.  Since

                    that amount of time could be less than a

                    management station's poll cycle time, in order

                    to avoid a loss of information, a management

                    station is advised to poll the

                    dot3HCStatsInternalMacTransmitErrors object for

                    10 Gb/s or faster interfaces.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.12,

                    aFramesLostDueToIntMACXmitError."

        ::= { 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.

                    This counter does not increment when the

                    interface is operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.13,

                    aCarrierSenseErrors."

        ::= { 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 pertain are,

                    according to the conventions of IEEE 802.3

                    Layer Management, counted exclusively according

                    to the error status presented to the LLC.

                    For interfaces operating at 10 Gb/s, this

                    counter can roll over in less than 80 minutes if

                    it is incrementing at its maximum rate.  Since

                    that amount of time could be less than a

                    management station's poll cycle time, in order

                    to avoid a loss of information, a management

                    station is advised to poll the

                    dot3HCStatsFrameTooLongs object for 10 Gb/s

                    or faster interfaces.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.25,

                    aFrameTooLongErrors."

        ::= { dot3StatsEntry 13 }

    -- { dot3StatsEntry 14 } is not assigned

    -- { 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.

                    For interfaces operating at 10 Gb/s, this

                    counter can roll over in less than 5 minutes if

                    it is incrementing at its maximum rate.  Since

                    that amount of time could be less than a

                    management station's poll cycle time, in order

                    to avoid a loss of information, a management

                    station is advised to poll the

                    dot3HCStatsInternalMacReceiveErrors object for

                    10 Gb/s or faster interfaces.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.15,

                    aFramesLostDueToIntMACRcvError."

        ::= { dot3StatsEntry 16 }

    dot3StatsEtherChipSet OBJECT-TYPE

        SYNTAX      OBJECT IDENTIFIER

        MAX-ACCESS  read-only

        STATUS      deprecated

        DESCRIPTION "******** THIS OBJECT IS DEPRECATED ********

                    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.

                    This object has been deprecated.  Implementation

                    feedback indicates that it is of limited use for

                    debugging network problems in the field, and

                    the administrative overhead involved in

                    maintaining a registry of chipset OIDs is not

                    justified."

        ::= { dot3StatsEntry 17 }

    dot3StatsSymbolErrors OBJECT-TYPE

        SYNTAX      Counter32

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "For an interface operating at 100 Mb/s, the

                    number of times there was an invalid data symbol

                    when a valid carrier was present.

                    For an interface operating in half-duplex mode

                    at 1000 Mb/s, the number of times the receiving

                    media is non-idle (a carrier event) for a period

                    of time equal to or greater than slotTime, and

                    during which there was at least one occurrence

                    of an event that causes the PHY to indicate

                    'Data reception error' or 'carrier extend error'

                    on the GMII.

                    For an interface operating in full-duplex mode

                    at 1000 Mb/s, the number of times the receiving

                    media is non-idle (a carrier event) for a period

                    of time equal to or greater than minFrameSize,

                    and during which there was at least one

                    occurrence of an event that causes the PHY to

                    indicate 'Data reception error' on the GMII.

                    For an interface operating at 10 Gb/s, the

                    number of times the receiving media is non-idle

                    (a carrier event) for a period of time equal to

                    or greater than minFrameSize, and during which

                    there was at least one occurrence of an event

                    that causes the PHY to indicate 'Receive Error'

                    on the XGMII.

                    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.  This count does

                    not increment if a collision is present.

                    This counter does not increment when the

                    interface is operating at 10 Mb/s.

                    For interfaces operating at 10 Gb/s, this

                    counter can roll over in less than 5 minutes if

                    it is incrementing at its maximum rate.  Since

                    that amount of time could be less than a

                    management station's poll cycle time, in order

                    to avoid a loss of information, a management

                    station is advised to poll the

                    dot3HCStatsSymbolErrors object for 10 Gb/s

                    or faster interfaces.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.2.1.5,

                    aSymbolErrorDuringCarrier."

        ::= { dot3StatsEntry 18 }

    dot3StatsDuplexStatus OBJECT-TYPE

        SYNTAX      INTEGER {

                        unknown(1),

                        halfDuplex(2),

                        fullDuplex(3)

                    }

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "The current mode of operation of the MAC

                    entity.  'unknown' indicates that the current

                    duplex mode could not be determined.

                    Management control of the duplex mode is

                    accomplished through the MAU MIB.  When

                    an interface does not support autonegotiation,

                    or when autonegotiation is not enabled, the

                    duplex mode is controlled using

                    ifMauDefaultType.  When autonegotiation is

                    supported and enabled, duplex mode is controlled

                    using ifMauAutoNegAdvertisedBits.  In either

                    case, the currently operating duplex mode is

                    reflected both in this object and in ifMauType.

                    Note that this object provides redundant

                    information with ifMauType.  Normally, redundant

                    objects are discouraged.  However, in this

                    instance, it allows a management application to

                    determine the duplex status of an interface

                    without having to know every possible value of

                    ifMauType.  This was felt to be sufficiently

                    valuable to justify the redundancy."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.32,

                    aDuplexStatus."

        ::= { dot3StatsEntry 19 }

    dot3StatsRateControlAbility OBJECT-TYPE

        SYNTAX      TruthValue

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "'true' for interfaces operating at speeds above

                    1000 Mb/s that support Rate Control through

                    lowering the average data rate of the MAC

                    sublayer, with frame granularity, and 'false'

                    otherwise."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.33,

                    aRateControlAbility."

        ::= { dot3StatsEntry 20 }

    dot3StatsRateControlStatus OBJECT-TYPE

        SYNTAX      INTEGER {

                        rateControlOff(1),

                        rateControlOn(2),

                        unknown(3)

                    }

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "The current Rate Control mode of operation of

                    the MAC sublayer of this interface."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.34,

                    aRateControlStatus."

        ::= { dot3StatsEntry 21 }

    -- 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."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.1.1.30,

                    aCollisionFrames."

        ::= { 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        Integer32,

            dot3CollFrequencies  Counter32

        }

    -- { dot3CollEntry 1 } is no longer in use

    dot3CollCount OBJECT-TYPE

        SYNTAX      Integer32 (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.

                    This counter does not increment when the

                    interface is operating in full-duplex mode.

                    Discontinuities in the value of this counter can

                    occur at re-initialization of the management

                    system, and at other times as indicated by the

                    value of ifCounterDiscontinuityTime."

        ::= { dot3CollEntry 3 }

    dot3ControlTable OBJECT-TYPE

        SYNTAX      SEQUENCE OF Dot3ControlEntry

        MAX-ACCESS  not-accessible

        STATUS      current

        DESCRIPTION "A table of descriptive and status information

                    about the MAC Control sublayer on the

                    ethernet-like interfaces attached to a

                    particular system.  There will be one row in

                    this table for each ethernet-like interface in

                    the system which implements the MAC Control

                    sublayer.  If some, but not all, of the

                    ethernet-like interfaces in the system implement

                    the MAC Control sublayer, there will be fewer

                    rows in this table than in the dot3StatsTable."

        ::= { dot3 9 }

    dot3ControlEntry OBJECT-TYPE

        SYNTAX      Dot3ControlEntry

        MAX-ACCESS  not-accessible

        STATUS      current

        DESCRIPTION "An entry in the table, containing information

                    about the MAC Control sublayer on a single

                    ethernet-like interface."

        INDEX       { dot3StatsIndex }

        ::= { dot3ControlTable 1 }

    Dot3ControlEntry ::=

        SEQUENCE {

            dot3ControlFunctionsSupported       BITS,

            dot3ControlInUnknownOpcodes         Counter32,

            dot3HCControlInUnknownOpcodes       Counter64

        }

    dot3ControlFunctionsSupported OBJECT-TYPE

        SYNTAX      BITS {

                        pause(0)   -- 802.3 flow control

                    }

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "A list of the possible MAC Control functions

                    implemented for this interface."

        REFERENCE   "[IEEE 802.3 Std.], 30.3.3.2,

                    aMACControlFunctionsSupported."

        ::= { dot3ControlEntry 1 }

    dot3ControlInUnknownOpcodes OBJECT-TYPE

        SYNTAX      Counter32

        MAX-ACCESS  read-only

        STATUS      current

        DESCRIPTION "A count of MAC Control frames received on this

                    interface that contain an opcode that is not

                    supported by this device.

                    For interfaces operating at 10 Gb/s, this

                    counter can roll over in less than 5 minutes if

                    it is incrementing at its maximum rate.  Since

                    that amount of time could be less than a

                    management station's poll cycle time, in order