rfc2020.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

                      this MAC."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.5.2.1,
                      aMACVersion."
              ::= { dot12ConfigEntry 5 }

          dot12LastTrainingConfig OBJECT-TYPE
              SYNTAX     OCTET STRING (SIZE(2))
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This 16 bit field contains the configuration
                      bits from the most recent error-free training
                      frame received during training on this interface.
                      Training request frames are received when in
                      master mode, while training response frames are
                      received in slave mode.  On master mode interfaces,
                      this object contains the contents of the
                      requested configuration field of the most recent
                      training request frame.  On slave mode interfaces,
                      this object contains the contents of the allowed
                      configuration field of the most recent training
                      response frame.  The format of the current version
                      of this field is described in section 3.8.  Please
                      refer to the most recent version of the IEEE
                      802.12 standard for the most up-to-date definition



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RFC 2020               IEEE 802.12 Interface MIB            October 1996


                      of the format of this object."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.5.2.1,
                      aLastTrainingConfig."
              ::= { dot12ConfigEntry 6 }

          dot12Commands OBJECT-TYPE
              SYNTAX     INTEGER {
                             noOp(1),
                             open(2),
                             reset(3),
                             close(4)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "If the current value of dot12Status is 'closed',
                      setting the value of this object to 'open' will
                      change the corresponding instance of MIB-II's
                      ifAdminStatus to 'up', cause this interface to
                      enter the 'opening' state, and will cause training
                      to be initiated on this interface.  The progress
                      and success of the open is given by the values of
                      the dot12Status object.  Setting this object to
                      'open' when dot12Status has a value other than
                      'closed' has no effect.

                      Setting the corresponding instance of ifAdminStatus
                      to 'up' when the current value of dot12Status is
                      'closed' will have the same effect as setting this
                      object to 'open'.  Setting ifAdminStatus to 'up'
                      when dot12Status has a value other than 'closed'
                      has no effect.

                      Setting the value of this object to 'close' will
                      move this interface into the 'closed' state and
                      cause all transmit and receive actions to stop.
                      This object will then have to be set to 'open' in
                      order to reinitiate training.

                      Setting the corresponding instance of ifAdminStatus
                      to 'down' will have the same effect as setting this
                      object to 'close'.

                      Setting the value of this object to 'reset' when
                      the current value of dot12Status has a value other
                      than 'closed' will reset the interface.  On a
                      reset, all MIB counters should retain their values.



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RFC 2020               IEEE 802.12 Interface MIB            October 1996


                      This will cause the MAC to initiate an
                      acInitializeMAC action as specified in IEEE 802.12.
                      This will cause training to be reinitiated on this
                      interface.  Setting this object to 'reset' when
                      dot12Status has a value of 'closed' has no effect.
                      Setting this object to 'reset' has no effect on the
                      corresponding instance of ifAdminStatus.

                      Setting the value of this object to 'noOp' has no
                      effect.

                      When read, this object will always have a value
                      of 'noOp'."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.5.2.2,
                      acOpen, acClose, acInitializeMAC.
                      Also, RFC1231 IEEE802.5 Token Ring MIB,
                      dot5Commands."
              ::= { dot12ConfigEntry 7 }

          dot12Status OBJECT-TYPE
              SYNTAX     INTEGER {
                             opened(1),
                             closed(2),
                             opening(3),
                             openFailure(5),
                             linkFailure(6)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The current interface status with respect to
                      training.  One of the following values:

                          opened      - Training has completed
                                        successfully.
                          closed      - MAC has been disabled by
                                        setting dot12Commands to
                                        'close'.
                          opening     - MAC is in training.  Training
                                        signals have been received.
                          openFailure - Passed 24 error-free packets,
                                        but there is a problem, noted
                                        in the training configuration
                                        bits (dot12LastTrainingConfig).
                          linkFailure - Training signals not received,
                                        or could not pass 24 error-free
                                        packets.



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RFC 2020               IEEE 802.12 Interface MIB            October 1996


                      Whenever the dot12Commands object is set to
                      'close' or ifAdminStatus is set to 'down', the MAC
                      will go silent, dot12Status will be 'closed', and
                      ifOperStatus will be 'down'.

                      When the value of this object is equal to 'closed'
                      and the dot12Commands object is set to 'open' or
                      the ifAdminStatus object is set to 'up', training
                      will be initiated on this interface.  When the
                      value of this object is not equal to 'closed' and
                      the dot12Commands object is set to 'reset',
                      training will be reinitiated on this interface.
                      Note that sets of some other objects (e.g.
                      dot12ControlMode) or external events (e.g. MAC
                      protocol violations) may also cause training to be
                      reinitiated on this interface.

                      When training is initiated or reinitiated on an
                      interface, the end node will send Training_Up to
                      the master and initially go to the 'linkFailure'
                      state and ifOperStatus will go to 'down'.
                      When the master sends back Training_Down,
                      dot12Status will change to the 'opening' state,
                      and training packets will be transferred.

                      After all of the training packets have been
                      passed, dot12Status will change to 'linkFailure'
                      if 24 consecutive error-free packets were not
                      passed, 'opened' if 24 consecutive error-free
                      packets were passed and the training
                      configuration bits were OK, or 'openFailure' if
                      there were 24 consecutive error-free packets, but
                      there was a problem with the training
                      configuration bits.

                      When in the 'openFailure' state, the
                      dot12LastTrainingConfig object will contain the
                      configuration bits from the last training
                      packet which can be examined to determine the
                      exact reason for the training configuration
                      failure.

                      If training did not succeed (dot12Status is
                      'linkFailure' or 'openFailure), the entire
                      process will be restarted after
                      MAC_Retraining_Delay_Timer seconds.

                      If training does succeed (dot12Status changes to



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RFC 2020               IEEE 802.12 Interface MIB            October 1996


                      'opened'), ifOperStatus will change to 'up'.  If
                      training does not succeed (dot12Status changes to
                      'linkFailure' or 'openFailure'), ifOperStatus will
                      remain 'down'."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.5.2.1,
                      aMACStatus."
              ::= { dot12ConfigEntry 8 }

          dot12ControlMode OBJECT-TYPE
              SYNTAX     INTEGER {
                             masterMode(1),
                             slaveMode(2),
                             learn(3)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "This object is used to configure and report
                      whether or not this interface is operating in
                      master mode.  In a Demand Priority network, end
                      node interfaces typically operate in slave mode,
                      while switch interfaces may control the Demand
                      Priority protocol and operate in master mode.

                      This object may be implemented as a read-only
                      object by those agents and interfaces that do not
                      implement software control of master mode.  In
                      particular, interfaces that cannot operate in
                      master mode, and interfaces on which master mode
                      is controlled by a pushbutton on the device,
                      should implement this object read-only.

                      Some interfaces do not require network management
                      configuration of this feature and can autosense
                      whether to use master mode or slave mode.  The
                      value 'learn' is used for that purpose.  While
                      autosense is taking place, the value 'learn' is
                      returned.

                      A network management operation which modifies the
                      value of dot12ControlMode causes the interface
                      to retrain."
              ::= { dot12ConfigEntry 9 }

          dot12StatTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF Dot12StatEntry
              MAX-ACCESS not-accessible



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              STATUS     current
              DESCRIPTION
                      "Statistics for a collection of 802.12 interfaces
                      attached to a particular system."
              ::= { dot12MIBObjects 2 }

          dot12StatEntry OBJECT-TYPE
              SYNTAX     Dot12StatEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "Statistics for a particular interface to an
                      802.12 medium.  The receive statistics in this
                      table apply only to packets received by this
                      station (i.e., packets whose destination address
                      is either the local station address, the
                      broadcast address, or a multicast address that
                      this station is receiving, unless the station is
                      in promiscuous mode)."
              INDEX      { ifIndex }
              ::= { dot12StatTable 1 }

          Dot12StatEntry ::=
              SEQUENCE {
                  dot12InHighPriorityFrames       Counter32,
                  dot12InHighPriorityOctets       Counter32,
                  dot12InNormPriorityFrames       Counter32,
                  dot12InNormPriorityOctets       Counter32,
                  dot12InIPMErrors                Counter32,
                  dot12InOversizeFrameErrors      Counter32,
                  dot12InDataErrors               Counter32,
                  dot12InNullAddressedFrames      Counter32,
                  dot12OutHighPriorityFrames      Counter32,
                  dot12OutHighPriorityOctets      Counter32,
                  dot12TransitionIntoTrainings    Counter32,
                  dot12HCInHighPriorityOctets     Counter64,
                  dot12HCInNormPriorityOctets     Counter64,
                  dot12HCOutHighPriorityOctets    Counter64
              }

          dot12InHighPriorityFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of high priority frames
                      that have been received on this interface.
                      Includes both good and bad high priority frames,