rfc2955.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

                     mode1(1)        = the DE field in the Q.922 core
                                       frame shall be mapped to the ATM
                                       CLP field of every cell
                                       generated by the segmentation
                                       process of the AAL5 PDU
                                       containing the information of
                                       that frame.

                     mode2Contst0(2) = the ATM CLP field of every cell
                                       generated by the segmentation
                                       process of the AAL5 PDU
                                       containing the information of
                                       that frame shall be set to
                                       constant 0.

                     mode2Contst1(3) = the ATM CLP field of every cell
                                       generated by the segmentation
                                       process of the AAL5 PDU
                                       containing the information of
                                       that frame shall be set to
                                       constant 1."
             REFERENCE
                      "FRF.8 [17], Section 4.2.1"
             DEFVAL { mode1 }
             ::= { frAtmIwfConnectionDescriptorEntry 3 }

         frAtmIwfConnClpToDeMappingMode OBJECT-TYPE
             SYNTAX      INTEGER {
                           mode1(1),
                           mode2Const0(2),
                           mode2Const1(3)
                         }
             MAX-ACCESS  read-create
             STATUS      current
             DESCRIPTION
                     "This object describes which mode of translation
                     is in use for loss priority mapping in the ATM to
                     frame relay direction.

                     mode1(1)       = if one or more cells in a frame
                                      has its CLP field set, the DE
                                      field of the Q.922 core frame
                                      should be set.

                     mode2Const0(2) = the DE field of the Q.922 core
                                      frame should be set to the



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RFC 2955           FR to ATM Service Interworking MIB       October 2000


                                      constant 0.

                     mode2Const1(3) = the DE field of the Q.922 core
                                      frame should be set to the
                                      constant 1."
             REFERENCE
                      "FRF.8 [17], Section 4.2.2"
             DEFVAL { mode1 }
             ::= { frAtmIwfConnectionDescriptorEntry 4 }

         frAtmIwfConnCongestionMappingMode OBJECT-TYPE
             SYNTAX      INTEGER {
                            mode1(1),
                            mode2(2)
                         }
             MAX-ACCESS  read-create
             STATUS      current
             DESCRIPTION
                     "This object describes which mode of translation
                     is in use for forward congestion indication
                     mapping in the frame relay to ATM direction.

                     mode1(1) = The FECN field in the Q.922 core frame
                                shall be mapped to the ATM EFCI field
                                of every cell generated by the
                                segmentation process of the AAL5 PDU
                                containing the information of that
                                frame.

                     mode2(2) = The FECN field in the Q.922 core frame
                                shall not be mapped to the ATM EFCI
                                field of cells generated by the
                                segmentation process of the AAL5 PDU
                                containing the information of that
                                frame. The EFCI field is always set to
                                'congestion not experienced'.

                     In both of the modes above, if there is congestion
                     in the forward direction in the ATM layer within
                     the IWF, then the IWF can set the EFCI field to
                     'congestion experienced'."
             REFERENCE
                         "FRF.8 [17], Section 4.3.1.1"
             DEFVAL      { mode1 }
             ::= { frAtmIwfConnectionDescriptorEntry 5 }

         frAtmIwfConnEncapsulationMappingMode OBJECT-TYPE
             SYNTAX      INTEGER {



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                            transparentMode(1),
                            translationMode(2),
                            translationModeAll(3)
                         }
             MAX-ACCESS  read-create
             STATUS      current
             DESCRIPTION
                     "This object indicates whether the mapping of
                     upper layer protocol encapsulation is enabled on
                     this interworking connection.

                     transparentMode(1) = Forward the encapsulations
                                          unaltered.

                     translationMode(2) = Perform mapping between the
                                          two encapsulations due to the
                                          incompatibilities of the two
                                          methods. Mapping is provided
                                          for a subset of the potential
                                          encapsulations as itemized in
                                          frAtmIwfConnEncapsulationMapp
                                          ings.

                     translationModeAll(3) = Perform mapping between
                                          the two encapsulations due to
                                          the incompatibilities of the
                                          two methods. All
                                          encapsulations are
                                          translated."
             REFERENCE
                         "FRF.8 [17], Section 5.3"
             DEFVAL      { transparentMode }
             ::= { frAtmIwfConnectionDescriptorEntry 6 }

         frAtmIwfConnEncapsulationMappings OBJECT-TYPE
             SYNTAX      BITS {
                    none (0),
                    bridgedPdus(1),
                    bridged802dot6(2),
                    bPdus(3),
                    routedIp(4),
                    routedOsi(5),
                    otherRouted(6),
                    x25Iso8202(7),
                    q933q2931(8) }
             MAX-ACCESS  read-create
             STATUS      current
             DESCRIPTION



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                     "If upper layer protocol encapsulation mapping is
                     enabled on this interworking connection, then this
                     attribute enumerates which of the encapsulation
                     mappings are supported.

                     none(0)           = Transparent mode operation
                     bridgedPdus(1)    = PID: 0x00-01,-07,-02 or -08
                     bridged802dot6(2) = PID: 0x00-0B
                     bPdus(3)          = PID: 0x00-0E or -0F
                     routedIp(4)       = NLPID: OxCC
                     routedOsi(5)      = NLPID: Ox81, 0x82 or 0x83
                     otherRouted(6)    = Other routed protocols
                     x25Iso8202(7)     = X25
                     q933q2931(8)      = Q.933 and Q.2931"
             REFERENCE
                         "FRF.8 [17], Section 5.3.1"
             DEFVAL      { { none } }
             ::= { frAtmIwfConnectionDescriptorEntry 7 }

         frAtmIwfConnFragAndReassEnabled OBJECT-TYPE
             SYNTAX      INTEGER { enabled(1),  disabled(2)}
             MAX-ACCESS  read-create
             STATUS      current
             DESCRIPTION
                     "The attribute indicates whether fragmentation and
                     reassembly is enabled for this connection."
             REFERENCE
                         "FRF.8 [17], Section 5.3.1.4"
             DEFVAL      { disabled }
             ::= { frAtmIwfConnectionDescriptorEntry 8 }

         frAtmIwfConnArpTranslationEnabled OBJECT-TYPE
             SYNTAX      INTEGER { enabled(1),  disabled(2)}
             MAX-ACCESS  read-create
             STATUS      current
             DESCRIPTION
                     "The attribute indicates whether ARP translation
                     is enabled for this connection."
             REFERENCE
                         "FRF.8 [17], Section 5.4"
             DEFVAL      { disabled }
             ::= { frAtmIwfConnectionDescriptorEntry 9 }

         --
         -- Augmentation of ATM MIB VCL Endpoint Table (atmVclTable)
         --
         frAtmIwfVclTable OBJECT-TYPE
             SYNTAX      SEQUENCE OF FrAtmIwfVclEntry



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             MAX-ACCESS  not-accessible
             STATUS      current
             DESCRIPTION
                     "The FR/ATM IWF VCL Table augments the ATM MIB VCL
                     Endpoint table."
             ::= { frAtmIwfMIBObjects 5 }

         frAtmIwfVclEntry OBJECT-TYPE
             SYNTAX      FrAtmIwfVclEntry
             MAX-ACCESS  not-accessible
             STATUS      current
             DESCRIPTION
                     "Entries in this table are created only by the
                     agent. One entry exists for each ATM VCL managed
                     by the agent."
             AUGMENTS    { atmVclEntry }
             ::= { frAtmIwfVclTable 1 }

         FrAtmIwfVclEntry ::= SEQUENCE {
             frAtmIwfVclCrossConnectIdentifier    Integer32
         }

         frAtmIwfVclCrossConnectIdentifier OBJECT-TYPE
             SYNTAX      Integer32  (1..2147483647)
             MAX-ACCESS  read-only
             STATUS      current
             DESCRIPTION
                     "This object contains the index value of the
                     FR/ATM cross-connect table entry used to link the
                     ATM VCL with a frame relay PVC.

                     Each row of the atmVclTable that is not cross-
                     connected with a frame relay PVC MUST return the
                     value zero when this object is read.

                     In the case of (frame relay) point to (ATM)
                     multipoint, multiple ATM VCLs will have the same
                     value of this object, and all their cross-
                     connections are identified by entries that are
                     indexed by the same value of
                     frAtmIwfVclCrossConnectIdentifier in the
                     frAtmIwfConnectionTable of this MIB module.

                     The value of this object is initialized by the
                     agent after the associated entries in the
                     frAtmIwfConnectionTable have been created."
             ::= { frAtmIwfVclEntry 1 }




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         --
         -- Frame Relay/ATM PVC Service Interworking NOTIFICATION
         --

         frAtmIwfConnStatusChange NOTIFICATION-TYPE
             OBJECTS {   frAtmIwfConnAdminStatus,
                         frAtmIwfConnAtm2FrOperStatus,
                         frAtmIwfConnFr2AtmOperStatus
                      }
             STATUS      current
             DESCRIPTION
                     "An indication that the status of this
                     interworking connection has changed."
             ::= { frAtmIwfTrapsPrefix 1 }

         --
         -- Conformance Information
         --

         --
         -- Compliance Statement For Equipment
         --

         frAtmIwfEquipmentCompliance MODULE-COMPLIANCE
             STATUS      current
             DESCRIPTION
                     "The compliance statement for equipment that
                     implements the FR/ATM Interworking MIB."

             MODULE -- this module
                 MANDATORY-GROUPS { frAtmIwfBasicGroup,
                                    frAtmIwfConnectionDescriptorGroup,
                                    frAtmIwfAtmVclTableAugmentGroup,
                                    frAtmIwfNotificationsGroup }

                 OBJECT      frAtmIwfConnDeToClpMappingMode
                 SYNTAX      INTEGER { mode1(1) }
                 DESCRIPTION
                     "Only support for Mode 1 is REQUIRED."

                 OBJECT      frAtmIwfConnClpToDeMappingMode
                 SYNTAX      INTEGER { mode1(1) }
                 DESCRIPTION
                     "Only support for Mode