rfc1650.txt

RFC 的详细文档！

         dot3StatsExcessiveCollisions        Counter32,
         dot3StatsInternalMacTransmitErrors  Counter32,
         dot3StatsCarrierSenseErrors         Counter32,
         dot3StatsFrameTooLongs              Counter32,
         dot3StatsInternalMacReceiveErrors   Counter32,
                 dot3StatsEtherChipSet               OBJECT IDENTIFIER
    }

    dot3StatsIndex   OBJECT-TYPE
         SYNTAX      INTEGER
         ACCESS      read-only
         STATUS      mandatory
         DESCRIPTION
           "An index value that uniquely identifies an
           interface to an ethernet-like medium.  The



Kastenholz                                                      [Page 7]

RFC 1650                   Ethernet-Like MIB                 August 1994


           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
         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 }




Kastenholz                                                      [Page 8]

RFC 1650                   Ethernet-Like MIB                 August 1994


    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
         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



Kastenholz                                                      [Page 9]

RFC 1650                   Ethernet-Like MIB                 August 1994


         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.

         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 }



Kastenholz                                                     [Page 10]

RFC 1650                   Ethernet-Like MIB                 August 1994


    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.

         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



Kastenholz                                                     [Page 11]

RFC 1650                   Ethernet-Like MIB                 August 1994


         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

    -- { 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.



Kastenholz                                                     [Page 12]

RFC 1650                   Ethernet-Like MIB                 August 1994


         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 }

    -- 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."



Kastenholz                                                     [Page 13]

RFC 1650                   Ethernet-Like MIB                 August 1994


         ::= { 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 }