Entity MIB (Version 3)
RFC 4133

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Network Working Group                                         A. Bierman
Request for Comments: 4133                                 K. McCloghrie
Obsoletes: 2737                                      Cisco Systems, Inc.
Category: Standards Track                                    August 2005

                         Entity MIB (Version 3)

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.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes managed objects used for managing
   multiple logical and physical entities managed by a single SNMP
   agent.  This document specifies version 3 of the Entity MIB, which
   obsoletes version 2 (RFC 2737).

Bierman & McCloghrie        Standards Track                     [Page 1]
RFC 4133                 Entity MIB (Version 3)              August 2005

Table of Contents

   1. The SNMP Management Framework ...................................3
   2. Overview ........................................................3
      2.1. Terms ......................................................4
      2.2. Relationship to Community Strings ..........................5
      2.3. Relationship to SNMP Contexts ..............................5
      2.4. Relationship to Proxy Mechanisms ...........................6
      2.5. Relationship to a Chassis MIB ..............................6
      2.6. Relationship to the Interfaces MIB .........................6
      2.7. Relationship to the Other MIBs .............................7
      2.8. Relationship to Naming Scopes ..............................7
      2.9. Multiple Instances of the Entity MIB .......................7
      2.10. Re-Configuration of Entities ..............................8
      2.11. Textual Convention Change .................................8
      2.12. MIB Structure .............................................8
            2.12.1. entityPhysical Group ..............................9
            2.12.2. entityLogical Group ..............................11
            2.12.3. entityMapping Group ..............................11
            2.12.4. entityGeneral Group ..............................12
            2.12.5. entityNotifications Group ........................12
      2.13. Multiple Agents ..........................................12
      2.14. Changes Since RFC 2037 ...................................12
            2.14.1. Textual Conventions ..............................12
            2.14.2. New entPhysicalTable Objects .....................13
            2.14.3. New entLogicalTable Objects ......................13
            2.14.4. Bug Fixes ........................................13
      2.15. Changes Since RFC 2737 ...................................13
            2.15.1. Textual Conventions ..............................13
            2.15.2. New Objects ......................................14
            2.15.3. Bug Fixes ........................................14
   3. Definitions ....................................................14
   4. Usage Examples .................................................44
      4.1. Router/Bridge .............................................44
      4.2. Repeaters .................................................50
   5. Security Considerations ........................................57
   6. IANA Considerations ............................................58
   7. Acknowledgements ...............................................59
   8. References .....................................................59
      8.1. Normative References ......................................59
      8.2. Informative References ....................................59

Bierman & McCloghrie        Standards Track                     [Page 2]
RFC 4133                 Entity MIB (Version 3)              August 2005

1.  The SNMP Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC 3410 [RFC3410].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,