Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)
RFC 1906

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Network Working Group                               SNMPv2 Working Group
Request for Comments: 1906                                       J. Case
Obsoletes: 1449                                      SNMP Research, Inc.
Category: Standards Track                                  K. McCloghrie
                                                     Cisco Systems, Inc.
                                                                 M. Rose
                                            Dover Beach Consulting, Inc.
                                                           S. Waldbusser
                                          International Network Services
                                                            January 1996

                Transport Mappings for Version 2 of the
              Simple Network Management Protocol (SNMPv2)

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Table of Contents

   1. Introduction ................................................    2
   1.1 A Note on Terminology ......................................    2
   2. Definitions .................................................    3
   3. SNMPv2 over UDP .............................................    5
   3.1 Serialization ..............................................    5
   3.2 Well-known Values ..........................................    5
   4. SNMPv2 over OSI .............................................    6
   4.1 Serialization ..............................................    6
   4.2 Well-known Values ..........................................    6
   5. SNMPv2 over DDP .............................................    6
   5.1 Serialization ..............................................    6
   5.2 Well-known Values ..........................................    6
   5.3 Discussion of AppleTalk Addressing .........................    7
   5.3.1 How to Acquire NBP names .................................    8
   5.3.2 When to Turn NBP names into DDP addresses ................    8
   5.3.3 How to Turn NBP names into DDP addresses .................    8
   5.3.4 What if NBP is broken ....................................    9
   6. SNMPv2 over IPX .............................................    9
   6.1 Serialization ..............................................    9
   6.2 Well-known Values ..........................................    9
   7. Proxy to SNMPv1 .............................................   10
   8. Serialization using the Basic Encoding Rules ................   10
   8.1 Usage Example ..............................................   11

SNMPv2 Working Group        Standards Track                     [Page 1]
RFC 1906             Transport Mappings for SNMPv2          January 1996

   9. Security Considerations .....................................   11
   10. Editor's Address ...........................................   12
   11. Acknowledgements ...........................................   12
   12. References .................................................   13

1.  Introduction

   A management system contains:  several (potentially many) nodes, each
   with a processing entity, termed an agent, which has access to
   management instrumentation; at least one management station; and, a
   management protocol, used to convey management information between
   the agents and management stations.  Operations of the protocol are
   carried out under an administrative framework which defines
   authentication, authorization, access control, and privacy policies.

   Management stations execute management applications which monitor and
   control managed elements.  Managed elements are devices such as
   hosts, routers, terminal servers, etc., which are monitored and
   controlled via access to their management information.

   The management protocol, version 2 of the Simple Network Management
   Protocol [1], may be used over a variety of protocol suites.  It is
   the purpose of this document to define how the SNMPv2 maps onto an
   initial set of transport domains.  Other mappings may be defined in
   the future.

   Although several mappings are defined, the mapping onto UDP is the
   preferred mapping.  As such, to provide for the greatest level of
   interoperability, systems which choose to deploy other mappings
   should also provide for proxy service to the UDP mapping.

1.1.  A Note on Terminology

   For the purpose of exposition, the original Internet-standard Network
   Management Framework, as described in RFCs 1155 (STD 16), 1157 (STD
   15), and 1212 (STD 16), is termed the SNMP version 1 framework
   (SNMPv1).  The current framework is termed the SNMP version 2