RFC 1157 (rfc1157) - Page 1 of 36

Simple Network Management Protocol (SNMP)

Network Working Group                                            J. Case
Request for Comments:  1157                                SNMP Research
Obsoletes:  RFC 1098                                            M. Fedor
                                       Performance Systems International
                                                          M. Schoffstall
                                       Performance Systems International
                                                                J. Davin
                                     MIT Laboratory for Computer Science
                                                                May 1990


              A Simple Network Management Protocol (SNMP)

                           Table of Contents

   1. Status of this Memo ...................................    2
   2. Introduction ..........................................    2
   3. The SNMP Architecture .................................    5
   3.1 Goals of the Architecture ............................    5
   3.2 Elements of the Architecture .........................    5
   3.2.1 Scope of Management Information ....................    6
   3.2.2 Representation of Management Information ...........    6
   3.2.3 Operations Supported on Management Information .....    7
   3.2.4 Form and Meaning of Protocol Exchanges .............    8
   3.2.5 Definition of Administrative Relationships .........    8
   3.2.6 Form and Meaning of References to Managed Objects ..   12
   3.2.6.1 Resolution of Ambiguous MIB References ...........   12
   3.2.6.2 Resolution of References across MIB Versions......   12
   3.2.6.3 Identification of Object Instances ...............   12
   3.2.6.3.1 ifTable Object Type Names ......................   13
   3.2.6.3.2 atTable Object Type Names ......................   13
   3.2.6.3.3 ipAddrTable Object Type Names ..................   14
   3.2.6.3.4 ipRoutingTable Object Type Names ...............   14
   3.2.6.3.5 tcpConnTable Object Type Names .................   14
   3.2.6.3.6 egpNeighTable Object Type Names ................   15
   4. Protocol Specification ................................   16
   4.1 Elements of Procedure ................................   17
   4.1.1 Common Constructs ..................................   19
   4.1.2 The GetRequest-PDU .................................   20
   4.1.3 The GetNextRequest-PDU .............................   21
   4.1.3.1 Example of Table Traversal .......................   23
   4.1.4 The GetResponse-PDU ................................   24
   4.1.5 The SetRequest-PDU .................................   25
   4.1.6 The Trap-PDU .......................................   27
   4.1.6.1 The coldStart Trap ...............................   28
   4.1.6.2 The warmStart Trap ...............................   28
   4.1.6.3 The linkDown Trap ................................   28
   4.1.6.4 The linkUp Trap ..................................   28



Case, Fedor, Schoffstall, & Davin