rfc1448.txt

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          Case, McCloghrie, Rose & Waldbusser                   [Page 5]





          RFC 1448        Protocol Operations for SNMPv2      April 1993


          2.6.  Transport Mappings

          It is important to note that the exchange of SNMPv2 messages
          requires only an unreliable datagram service, with every
          message being entirely and independently contained in a single
          transport datagram.  Specific transport mappings and encoding
          rules are specified elsewhere [7].  However, the preferred
          mapping is the use of the User Datagram Protocol [8].










































          Case, McCloghrie, Rose & Waldbusser                   [Page 6]





          RFC 1448        Protocol Operations for SNMPv2      April 1993


          3.  Definitions

               SNMPv2-PDU DEFINITIONS ::= BEGIN

               IMPORTS
                   ObjectName, ObjectSyntax, Integer32
                       FROM SNMPv2-SMI;


               -- protocol data units

               PDUs ::=
                   CHOICE {
                       get-request
                           GetRequest-PDU,

                       get-next-request
                           GetNextRequest-PDU,

                       get-bulk-request
                           GetBulkRequest-PDU,

                       response
                           Response-PDU,

                       set-request
                           SetRequest-PDU,

                       inform-request
                           InformRequest-PDU,

                       snmpV2-trap
                           SNMPv2-Trap-PDU
                   }
















          Case, McCloghrie, Rose & Waldbusser                   [Page 7]





          RFC 1448        Protocol Operations for SNMPv2      April 1993


               -- PDUs

               GetRequest-PDU ::=
                   [0]
                       IMPLICIT PDU

               GetNextRequest-PDU ::=
                   [1]
                       IMPLICIT PDU

               Response-PDU ::=
                   [2]
                       IMPLICIT PDU

               SetRequest-PDU ::=
                   [3]
                       IMPLICIT PDU

               -- [4] is obsolete

               GetBulkRequest-PDU ::=
                   [5]
                       IMPLICIT BulkPDU

               InformRequest-PDU ::=
                   [6]
                       IMPLICIT PDU

               SNMPv2-Trap-PDU ::=
                   [7]
                       IMPLICIT PDU



















          Case, McCloghrie, Rose & Waldbusser                   [Page 8]





          RFC 1448        Protocol Operations for SNMPv2      April 1993


               max-bindings
                   INTEGER ::= 2147483647

               PDU ::=
                   SEQUENCE {
                       request-id
                           Integer32,

                       error-status            -- sometimes ignored
                           INTEGER {
                               noError(0),
                               tooBig(1),
                               noSuchName(2),   -- for proxy compatibility
                               badValue(3),     -- for proxy compatibility
                               readOnly(4),     -- for proxy compatibility
                               genErr(5),
                               noAccess(6),
                               wrongType(7),
                               wrongLength(8),
                               wrongEncoding(9),
                               wrongValue(10),
                               noCreation(11),
                               inconsistentValue(12),
                               resourceUnavailable(13),
                               commitFailed(14),
                               undoFailed(15),
                               authorizationError(16),
                               notWritable(17),
                               inconsistentName(18)
                           },

                       error-index            -- sometimes ignored
                           INTEGER (0..max-bindings),

                       variable-bindings   -- values are sometimes ignored
                           VarBindList
                   }













          Case, McCloghrie, Rose & Waldbusser                   [Page 9]





          RFC 1448        Protocol Operations for SNMPv2      April 1993


               BulkPDU ::=                     -- MUST be identical in
                   SEQUENCE {                  -- structure to PDU
                       request-id
                           Integer32,

                       non-repeaters
                           INTEGER (0..max-bindings),

                       max-repetitions
                           INTEGER (0..max-bindings),

                       variable-bindings       -- values are ignored
                           VarBindList
                   }




































          Case, McCloghrie, Rose & Waldbusser                  [Page 10]





          RFC 1448        Protocol Operations for SNMPv2      April 1993


               -- variable binding

               VarBind ::=
                   SEQUENCE {
                       name
                           ObjectName,

                       CHOICE {
                           value
                               ObjectSyntax,

                           unSpecified         -- in retrieval requests
                                   NULL,

                                               -- exceptions in responses
                           noSuchObject[0]
                                   IMPLICIT NULL,

                           noSuchInstance[1]
                                   IMPLICIT NULL,

                           endOfMibView[2]
                                   IMPLICIT NULL
                       }
                   }


               -- variable-binding list

               VarBindList ::=
                   SEQUENCE (SIZE (0..max-bindings)) OF
                       VarBind


               END