Simple Network Management Protocol (SNMP)
RFC 1098

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Network Working Group                                            J. Case
Request for Comments: 1098          University of Tennessee at Knoxville
Obsoletes: RFC 1067                                             M. Fedor
                                                          NYSERNet, Inc.
                                                          M. Schoffstall
                                        Rensselaer Polytechnic Institute
                                                                C. Davin
                                     MIT Laboratory for Computer Science
                                                              April 1989

              A Simple Network Management Protocol (SNMP)

                           Table of Contents

   1. Status of this Memo ...................................    2
   2. Introduction ..........................................    2
   3. The SNMP Architecture .................................    4
   3.1 Goals of the Architecture ............................    4
   3.2 Elements of the Architecture .........................    4
   3.2.1 Scope of Management Information ....................    5
   3.2.2 Representation of Management Information ...........    5
   3.2.3 Operations Supported on Management Information .....    6
   3.2.4 Form and Meaning of Protocol Exchanges .............    7
   3.2.5 Definition of Administrative Relationships .........    7
   3.2.6 Form and Meaning of References to Managed Objects ..   11
   3.2.6.1 Resolution of Ambiguous MIB References ...........   11
   3.2.6.2 Resolution of References across MIB Versions......   11
   3.2.6.3 Identification of Object Instances ...............   11
   3.2.6.3.1 ifTable Object Type Names ......................   12
   3.2.6.3.2 atTable Object Type Names ......................   12
   3.2.6.3.3 ipAddrTable Object Type Names ..................   13
   3.2.6.3.4 ipRoutingTable Object Type Names ...............   13
   3.2.6.3.5 tcpConnTable Object Type Names .................   13
   3.2.6.3.6 egpNeighTable Object Type Names ................   14
   4. Protocol Specification ................................   15
   4.1 Elements of Procedure ................................   16
   4.1.1 Common Constructs ..................................   18
   4.1.2 The GetRequest-PDU .................................   19
   4.1.3 The GetNextRequest-PDU .............................   20
   4.1.3.1 Example of Table Traversal .......................   22
   4.1.4 The GetResponse-PDU ................................   23
   4.1.5 The SetRequest-PDU .................................   24
   4.1.6 The Trap-PDU .......................................   26
   4.1.6.1 The coldStart Trap ...............................   27
   4.1.6.2 The warmStart Trap ...............................   27
   4.1.6.3 The linkDown Trap ................................   27
   4.1.6.4 The linkUp Trap ..................................   27

Case, Fedor, Schoffstall, & Davin                               [Page 1]
RFC 1098                          SNMP                        April 1989

   4.1.6.5 The authenticationFailure Trap ...................   27
   4.1.6.6 The egpNeighborLoss Trap .........................   27
   4.1.6.7 The enterpriseSpecific Trap ......................   28
   5. Definitions ...........................................   29
   6. Acknowledgements ......................................   32
   7. References ............................................   33

1.  Status of this Memo

   This RFC is a re-release of RFC 1067, with a changed "Status of this
   Memo" section.  This memo defines a simple protocol by which
   management information for a network element may be inspected or
   altered by logically remote users.  In particular, together with its
   companion memos which describe the structure of management
   information along with the initial management information base, these
   documents provide a simple, workable architecture and system for
   managing TCP/IP-based internets and in particular the Internet.

   The Internet Activities Board (IAB) has designated two different
   network management protocols with the same status of "Draft Standard"
   and "Recommended".

   The two protocols are the Common Management Information Services and
   Protocol over TCP/IP (CMOT) [9], and the Simple Network Management
   Protocol (SNMP) (this memo).

   The IAB intends each of these two protocols to receive the attention
   of implementers and experimenters.  The IAB seeks reports of
   experience with these two protocols from system builders and users.

   By this action, the IAB recommends that all IP and TCP
   implementations be network manageable (e.g., implement the Internet
   MIB [3]) and that the implementations that are network manageable are
   expected to adopt and implement at least one of these two Internet
   Draft Standards.

   Distribution of this memo is unlimited.

2.  Introduction