Administrative Model for version 2 of the Simple Network Management Protocol (SNMPv2)
RFC 1445

 
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Network Working Group                                J. Galvin
          Request for Comments: 1445         Trusted Information Systems
                                                           K. McCloghrie
                                                      Hughes LAN Systems
                                                              April 1993

                               Administrative Model
                               for version 2 of the
                   Simple Network Management Protocol (SNMPv2)

          Status of this Memo

          This RFC specifes an IAB standards track protocol for the
          Internet community, and requests discussion and suggestions
          for improvements.  Please refer to the current edition of the
          "IAB Official Protocol Standards" 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 Elements of the Model .................................    3
          2.1 SNMPv2 Party ........................................    3
          2.2 SNMPv2 Entity .......................................    6
          2.3 SNMPv2 Management Station ...........................    7
          2.4 SNMPv2 Agent ........................................    7
          2.5 View Subtree ........................................    7
          2.6 MIB View ............................................    8
          2.7 Proxy Relationship ..................................    8
          2.8 SNMPv2 Context ......................................   10
          2.9 SNMPv2 Management Communication .....................   10
          2.10 SNMPv2 Authenticated Management Communication ......   12
          2.11 SNMPv2 Private Management Communication ............   13
          2.12 SNMPv2 Management Communication Class ..............   14
          2.13 SNMPv2 Access Control Policy .......................   14
          3 Elements of Procedure .................................   17
          3.1 Generating a Request ................................   17
          3.2 Processing a Received Communication .................   18
          3.3 Generating a Response ...............................   21

          Galvin & McCloghrie                                   [Page i]



          RFC 1445       Administrative Model for SNMPv2      April 1993

          4 Application of the Model ..............................   23
          4.1 Non-Secure Minimal Agent Configuration ..............   23
          4.2 Secure Minimal Agent Configuration ..................   26
          4.3 MIB View Configurations .............................   28
          4.4 Proxy Configuration .................................   32
          4.4.1 Foreign Proxy Configuration .......................   33
          4.4.2 Native Proxy Configuration ........................   37
          4.5 Public Key Configuration ............................   41
          5 Security Considerations ...............................   44
          6 Acknowledgements ......................................   45
          7 References ............................................   46
          8 Authors' Addresses ....................................   47

          Galvin & McCloghrie                                   [Page 1]



          RFC 1445       Administrative Model for SNMPv2      April 1993

          1.  Introduction

          A network 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 both authentication and
          authorization policies.

          Network management stations execute management applications
          which monitor and control network elements.  Network elements
          are devices such as hosts, routers, terminal servers, etc.,
          which are monitored and controlled through access to their
          management information.

          It is the purpose of this document, the Administrative Model
          for SNMPv2, to define how the administrative framework is
          applied to realize effective network management in a variety
          of configurations and environments.

          The model described here entails the use of distinct
          identities for peers that exchange SNMPv2 messages.  Thus, it
          represents a departure from the community-based administrative
          model of the original SNMP [1].  By unambiguously identifying
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