rfc1227.txt

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   ClosePDU ::=
       [APPLICATION 1] IMPLICIT
           INTEGER {
               goingDown(0),
               unsupportedVersion(1),
               packetFormat(2),
               protocolError(3),
               internalError(4),
               authenticationFailure(5)
           }


   -- insert PDU

   RReqPDU ::=
       [APPLICATION 2] IMPLICIT
           SEQUENCE {
               subtree
                   ObjectName,

               priority    -- the lower the better, "-1" means default
                   INTEGER (-1..2147483647),

               operation



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                   INTEGER {
                       delete(0),    -- remove registration
                       readOnly(1),  -- add registration, objects are RO
                       readWrite(2)  --   .., objects are RW
                   }
           }

   RRspPDU ::=
       [APPLICATION 3] IMPLICIT
           INTEGER {
               failure(-1)

              -- on success the non-negative priority is returned
           }

   SOutPDU ::=
       [APPLICATION 4] IMPLICIT
           INTEGER {
               commit(0),
               rollback(1)
           }

   END


3.3.  Mappings on Transport Service

   The SMUX protocol may be mapped onto any CO-mode transport service.
   At present, only one such mapping is defined.

3.3.1.  Mapping onto the TCP

   When using the TCP to provide the transport-backing for the SMUX
   protocol, the SNMP agent listens on TCP port 199.

   Each SMUX PDU is serialized using the Basic Encoding Rules [4] and
   sent on the TCP.  As ASN.1 objects are self-delimiting when encoding
   using the BER, no packetization protocol is required.













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4.  MIB for the SMUX

   The MIB objects for the SMUX are implemented by the local SNMP agent:

          SMUX-MIB DEFINITIONS ::= BEGIN

          IMPORTS
                  enterprises
                          FROM RFC1155-SMI
                  OBJECT-TYPE
                          FROM RFC1212;

          unix    OBJECT IDENTIFIER ::= { enterprises 4 }

          smux    OBJECT IDENTIFIER ::= { unix 4 }

          smuxPeerTable   OBJECT-TYPE
                  SYNTAX  SEQUENCE OF SmuxPeerEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                      "The SMUX peer table."
                  ::= { smux 1 }

          smuxPeerEntry   OBJECT-TYPE
                  SYNTAX  SmuxPeerEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                      "An entry in the SMUX peer table."
                  INDEX   { smuxPindex }
                  ::= { smuxPeerTable 1}

          SmuxPeerEntry ::=
              SEQUENCE {
                  smuxPindex
                      INTEGER,
                  smuxPidentity
                      OBJECT IDENTIFIER,
                  smuxPdescription
                      DisplayString,
                  smuxPstatus
                      INTEGER
              }

          smuxPindex      OBJECT-TYPE
                  SYNTAX  INTEGER
                  ACCESS  read-only



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                  STATUS  mandatory
                  DESCRIPTION
                      "An index which uniquely identifies a SMUX peer."
                  ::= { smuxPeerEntry 1 }

          smuxPidentity   OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                      "The authoritative designation for a SMUX peer."
                  ::= { smuxPeerEntry 2 }

          smuxPdescription OBJECT-TYPE
                  SYNTAX  DisplayString (SIZE (0..255))
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                      "A human-readable description of a SMUX peer."
                  ::= { smuxPeerEntry 3 }

          smuxPstatus     OBJECT-TYPE
                  SYNTAX  INTEGER { valid(1), invalid(2), connecting(3) }
                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                      "The type of SMUX peer.

                      Setting this object to the value invalid(2) has
                      the effect of invaliding the corresponding entry
                      in the smuxPeerTable.  It is an implementation-
                      specific matter as to whether the agent removes an
                      invalidated entry from the table.  Accordingly,
                      management stations must be prepared to receive
                      tabular information from agents that correspond to
                      entries not currently in use.  Proper
                      interpretation of such entries requires
                      examination of the relative smuxPstatus object."
                  ::= { smuxPeerEntry 4 }

          smuxTreeTable   OBJECT-TYPE
                  SYNTAX  SEQUENCE OF SmuxTreeEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                      "The SMUX tree table."
                  ::= { smux 2 }




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          smuxTreeEntry   OBJECT-TYPE
                  SYNTAX  SmuxTreeEntry
                  ACCESS  not-accessible
                  STATUS  mandatory
                  DESCRIPTION
                      "An entry in the SMUX tree table."
                  INDEX   { smuxTsubtree, smuxTpriority }
                  ::= { smuxTreeTable 1}

          SmuxTreeEntry ::=
              SEQUENCE {
                  smuxTsubtree
                      OBJECT IDENTIFIER,
                  smuxTpriority
                      INTEGER,
                  smuxTindex
                      INTEGER,
                  smuxTstatus
                      INTEGER
              }

          smuxTsubtree    OBJECT-TYPE
                  SYNTAX  OBJECT IDENTIFIER
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                      "The MIB subtree being exported by a SMUX peer."
                  ::= { smuxTreeEntry 1 }

          smuxTpriority OBJECT-TYPE
                  SYNTAX  INTEGER (0..'07fffffff'h)
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                      "The SMUX peer's priority when exporting the MIB
                      subtree."
                  ::= { smuxTreeEntry 2 }

          smuxTindex OBJECT-TYPE
                  SYNTAX  INTEGER
                  ACCESS  read-only
                  STATUS  mandatory
                  DESCRIPTION
                      "The SMUX peer's identity."
                  ::= { smuxTreeEntry 3 }

          smuxTstatus     OBJECT-TYPE
                  SYNTAX  INTEGER { valid(1), invalid(2) }



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                  ACCESS  read-write
                  STATUS  mandatory
                  DESCRIPTION
                      "The type of SMUX tree.

                      Setting this object to the value invalid(2) has
                      the effect of invaliding the corresponding entry
                      in the smuxTreeTable.  It is an implementation-
                      specific matter as to whether the agent removes an
                      invalidated entry from the table.  Accordingly,
                      management stations must be prepared to receive
                      tabular information from agents that correspond to
                      entries not currently in use.  Proper
                      interpretation of such entries requires
                      examination of the relative smuxTstatus object."
                  ::= { smuxTreeEntry 4 }

          END

5.  Acknowledgements

   SMUX was designed one afternoon by these people:

               Jeffrey S. Case, UTK-CS
               James R. Davin, MIT-LCS
               Mark S. Fedor, PSI
               Jeffrey C. Honig, Cornell
               Louie A. Mamakos, UMD
               Michael G. Petry, UMD
               Yakov Rekhter, IBM
               Marshall T. Rose, PSI

6.  References

   [1] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
       Network Management Protocol", RFC 1157, SNMP Research,
       Performance Systems International, Performance Systems
       International, MIT Laboratory for Computer Science, May 1990.

   [2] McCloghrie K., and M. Rose, "Management Information Base for
       Network Management of TCP/IP-based Internets", RFC 1156,
       Performance Systems International and Hughes LAN Systems, May
       1990.

   [3] Information processing systems - Open Systems Interconnection -
       Specification of Abstract Syntax Notation One (ASN.1),
       International Organization for Standardization, International
       Standard 8824, December 1987.



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   [4] Information processing systems - Open Systems Interconnection -
       Specification of Basic Encoding Rules for Abstract Notation One
       (ASN.1), International Organization for Standardization,
       International Standard 8825, December 1987.

   [5] Rose, M., and K. McCloghrie, "Structure and Identification of
       Management Information for TCP/IP-based Internets", RFC 1155,
       Performance Systems International and Hughes LAN Systems, May
       1990.

7. Security Considerations

   Security issues are not discussed in this memo.

8. Author's Address

   Marshall T. Rose
   Performance Systems International, Inc.
   5201 Great America Parkway
   Suite 3106
   Santa Clara, CA  95054

   Phone: [phone]

   EMail: [e-mail]
   X.500:  rose, psi, us

























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