rfc2266.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

                      'internal' is used to identify ports which place
                      traffic into the repeater, but do not have any
                      external connections.  Note that both DTE and
                      cascaded repeater downlinks are considered
                      'local' ports."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aPortType."
              ::= { vgRptrBasicPortEntry 2 }

          vgRptrPortAdminStatus OBJECT-TYPE
              SYNTAX     INTEGER {
                             enabled(1),
                             disabled(2)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "Port enable/disable function.  Enabling a
                      disabled port will cause training to be
                      initiated by the training initiator (the slave
                      mode device) on the link.  Setting this object to
                      disabled(2) disables the port.

                      A disabled port neither transmits nor receives.
                      Once disabled, a port must be explicitly enabled
                      to restore operation.  A port which is disabled
                      when power is lost or when a reset is exerted
                      shall remain disabled when normal operation
                      resumes.

                      The value of this object should be preserved
                      across repeater resets and power failures."
              REFERENCE



Flick                       Standards Track                    [Page 22]

RFC 2266                IEEE 802.12 Repeater MIB            January 1998


                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aPortAdministrativeState."
              ::= { vgRptrBasicPortEntry 3 }

          vgRptrPortOperStatus OBJECT-TYPE
              SYNTAX     INTEGER {
                             active(1),
                             inactive(2),
                             training(3)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "Current status for the port as specified by the
                      PORT_META_STATE in the port process module of
                      clause 12 [IEEE Std 802.12].

                      During initialization or any link warning
                      conditions, vgRptrPortStatus will be
                      'inactive(2)'.

                      When Training_Up is received by the repeater on a
                      local port (or when Training_Down is received on
                      a cascade port), vgRptrPortStatus will change to
                      'training(3)' and vgRptrTrainingResult can be
                      monitored to see the detailed status regarding
                      training.

                      When 24 consecutive good FCS packets are exchanged
                      and the configuration bits are OK,
                      vgRptrPortStatus will change to 'active(1)'.

                      A disabled port shall have a port status of
                      'inactive(2)'."
              REFERENCE
                      "IEEE Standard 802.12, 13.2.4.5.1,
                      aPortStatus."
              ::= { vgRptrBasicPortEntry 4 }

          vgRptrPortSupportedPromiscMode OBJECT-TYPE
              SYNTAX     INTEGER {
                             singleModeOnly(1),
                             singleOrPromiscMode(2),
                             promiscModeOnly(3)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION



Flick                       Standards Track                    [Page 23]

RFC 2266                IEEE 802.12 Repeater MIB            January 1998


                      "This object describes whether the port hardware
                      is capable of supporting promiscuous mode, single
                      address mode (i.e., repeater filters unicasts not
                      addressed to the end station attached to this
                      port), or both.  A port for which vgRptrPortType
                      is equal to 'cascadeInternal' or 'cascadeExternal'
                      will always have a value of 'promiscModeOnly' for
                      this object."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aSupportedPromiscMode."
              ::= { vgRptrBasicPortEntry 5 }

          vgRptrPortSupportedCascadeMode OBJECT-TYPE
              SYNTAX     INTEGER {
                             endNodesOnly(1),
                             endNodesOrRepeaters(2),
                             cascadePort(3)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object describes whether the port hardware
                      is capable of supporting cascaded repeaters, end
                      nodes, or both.  A port for which vgRptrPortType
                      is equal to 'cascadeInternal' or
                      'cascadeExternal' will always have a value of
                      'cascadePort' for this object."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aSupportedCascadeMode."
              ::= { vgRptrBasicPortEntry 6 }

          vgRptrPortAllowedTrainType OBJECT-TYPE
              SYNTAX     INTEGER {
                             allowEndNodesOnly(1),
                             allowPromiscuousEndNodes(2),
                             allowEndNodesOrRepeaters(3),
                             allowAnything(4)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "This security object is set by the network
                      manager to configure what type of device is
                      permitted to connect to the port.  One of the
                      following values:




Flick                       Standards Track                    [Page 24]

RFC 2266                IEEE 802.12 Repeater MIB            January 1998


                          allowEndNodesOnly        - only non-
                                                     promiscuous end
                                                     nodes permitted.
                          allowPromiscuousEndNodes - promiscuous or
                                                     non-promiscuous
                                                     end nodes
                                                     permitted
                          allowEndNodesOrRepeaters - repeaters or non-
                                                     promiscuous end
                                                     nodes permitted
                          allowAnything            - repeaters,
                                                     promiscuous or
                                                     non-promiscuous
                                                     end nodes
                                                     permitted

                      For a port for which vgRptrPortType is equal to
                      'cascadeInternal' or 'cascadeExternal', the
                      corresponding instance of this object may not be
                      set to 'allowEndNodesOnly' or
                      'allowPromiscuousEndNodes'.

                      The agent must reject a SET of this object if the
                      value includes no capabilities that are
                      supported by this port's hardware, as defined by
                      the values of the corresponding instances of
                      vgRptrPortSupportedPromiscMode and
                      vgRptrPortSupportedCascadeMode.

                      Note that vgRptrPortSupportPromiscMode and
                      vgRptrPortSupportedCascadeMode represent what the
                      port hardware is capable of supporting.
                      vgRptrPortAllowedTrainType is used for setting an
                      administrative policy for a port.  The actual set
                      of training configurations that will be allowed
                      to succeed on a port is the intersection of what
                      the hardware will support and what is
                      administratively allowed.  The above requirement
                      on what values may be set to this object says that
                      the intersection of what is supported and what is
                      allowed must be non-empty.  In other words, it
                      must not result in a situation in which nothing
                      would be allowed to train on that port.  However,
                      a value can be set to this object as long as the
                      combination of this object and what is supported
                      by the hardware would still leave at least one
                      configuration that could successfully train on the
                      port.



Flick                       Standards Track                    [Page 25]

RFC 2266                IEEE 802.12 Repeater MIB            January 1998


                      The value of this object should be preserved
                      across repeater resets and power failures."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aAllowableTrainingType."
              ::= { vgRptrBasicPortEntry 7 }

          vgRptrPortLastTrainConfig OBJECT-TYPE
              SYNTAX     OCTET STRING (SIZE(2))
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a 16 bit field.  For local ports,
                      this object contains the requested configuration
                      field from the most recent error-free training
                      request frame sent by the device connected to
                      the port.  For cascade ports, this object contains
                      the responder's allowed configuration field from
                      the most recent error-free training response frame
                      received in response to training initiated by this
                      repeater.  The format of the current version of
                      this field is described in section 3.2.  Please
                      refer to the most recent version of the IEEE
                      802.12 standard for the most up-to-date definition
                      of the format of this object."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aLastTrainingConfig."
              ::= { vgRptrBasicPortEntry 8 }

          vgRptrPortTrainingResult OBJECT-TYPE
              SYNTAX     OCTET STRING (SIZE(3))
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This 18 bit field is used to indicate the result
                      of training.  It contains two bits which indicate
                      if error-free training frames have been received,
                      and it also contains the 16 bits of the allowed
                      configuration field from the most recent
                      error-free training response frame on the port.

                        First Octet:    Second and Third Octets:
                        7 6 5 4 3 2 1 0
                       +-+-+-+-+-+-+-+-+-----------------------------+
                       |0|0|0|0|0|0|V|G| allowed configuration field |
                       +-+-+-+-+-+-+-+-+-----------------------------+




Flick                       Standards Track                    [Page 26]

RFC 2266                IEEE 802.12 Repeater MIB            January 1998


                          V:   Valid: set when at least one error-free
                               training frame has been received.
                               Indicates the 16 training configuration
                               bits in vgRptrPortLastTrainConfig and
                               vgRptrPortTrainingResult contain valid
                               information.  This bit is cleared when
                               vgRptrPortStatus transitions to the
                               'inactive' or 'training' state.
                          G:   LinkGood: indicates the link hardware is
                               OK.  Set if 24 consecutive error-free
                               training packets have been exchanged.
                               Cleared when a training packet with
                               errors is received, or when
                               vgRptrPortStatus transitions to the
                               'inactive' or 'training' state.

                      The format of the current version of the allowed
                      configuration field is described in section 3.2.
                      Please refer to the most recent version of the
                      IEEE 802.12 standard for the most up-to-date
                      definition of the format of this field.

                      If the port is in training, a management station
                      can examine this object to see if any training
                      packets have been passed successfully.  If there
                      have been any good training packets, the Valid
                      bit will be set and the management station can
                      examine the allowed configuration field to see if