rfc3416.txt

开发snmp的开发包有两个开放的SNMP开发库

   Response-PDU is generated, transmitted to the originator of the
   InformRequest-PDU, and processing of the InformRequest-PDU terminates
   immediately thereafter.  This alternate Response-PDU is formatted
   with the same values in its request-id field as the received
   InformRequest-PDU, with the value of its error-status field set to
   "tooBig", the value of its error-index field set to zero, and an
   empty variable-bindings field.  This alternate Response-PDU is then
   encapsulated into a message.  If the size of the resultant message is
   less than or equal to both a local constraint and the maximum message
   size of the originator, it is transmitted to the originator of the
   InformRequest-PDU.  Otherwise, the snmpSilentDrops [RFC3418] counter
   is incremented and the resultant message is discarded.  Regardless,
   processing of the InformRequest-PDU terminates.

   Otherwise, the receiving SNMP entity:

   (1)   presents its contents to the appropriate application;




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   (2)   generates a Response-PDU with the same values in its request-id
         and variable-bindings fields as the received InformRequest-PDU,
         with the value of its error-status field set to "noError" and
         the value of its error-index field set to zero; and

   (3)   transmits the generated Response-PDU to the originator of the
         InformRequest-PDU.

5.  Notice on Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   intellectual property or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; neither does it represent that it
   has made any effort to identify any such rights.  Information on the
   IETF's procedures with respect to rights in standards-track and
   standards-related documentation can be found in BCP-11.  Copies of
   claims of rights made available for publication and any assurances of
   licenses to be made available, or the result of an attempt made to
   obtain a general license or permission for the use of such
   proprietary rights by implementors or users of this specification can
   be obtained from the IETF Secretariat.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights which may cover technology that may be required to practice
   this standard.  Please address the information to the IETF Executive
   Director.

6.  Acknowledgments

   This document is the product of the SNMPv3 Working Group.  Some
   special thanks are in order to the following Working Group members:

      Randy Bush
      Jeffrey D. Case
      Mike Daniele
      Rob Frye
      Lauren Heintz
      Keith McCloghrie
      Russ Mundy
      David T. Perkins
      Randy Presuhn
      Aleksey Romanov
      Juergen Schoenwaelder
      Bert Wijnen




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   This version of the document, edited by Randy Presuhn, was initially
   based on the work of a design team whose members were:

      Jeffrey D. Case
      Keith McCloghrie
      David T. Perkins
      Randy Presuhn
      Juergen Schoenwaelder

   The previous versions of this document, edited by Keith McCloghrie,
   was the result of significant work by four major contributors:

      Jeffrey D. Case
      Keith McCloghrie
      Marshall T. Rose
      Steven Waldbusser

   Additionally, the contributions of the SNMPv2 Working Group to the
   previous versions are also acknowledged.  In particular, a special
   thanks is extended for the contributions of:

      Alexander I. Alten
      Dave Arneson
      Uri Blumenthal
      Doug Book
      Kim Curran
      Jim Galvin
      Maria Greene
      Iain Hanson
      Dave Harrington
      Nguyen Hien
      Jeff Johnson
      Michael Kornegay
      Deirdre Kostick
      David Levi
      Daniel Mahoney
      Bob Natale
      Brian O'Keefe
      Andrew Pearson
      Dave Perkins
      Randy Presuhn
      Aleksey Romanov
      Shawn Routhier
      Jon Saperia
      Juergen Schoenwaelder
      Bob Stewart





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      Kaj Tesink
      Glenn Waters
      Bert Wijnen

7.  Security Considerations

   The protocol defined in this document by itself does not provide a
   secure environment.  Even if the network itself is secure (for
   example by using IPSec), there is no control as to who on the secure
   network is allowed access to management information.

   It is recommended that the implementors consider the security
   features as provided by the SNMPv3 framework.  Specifically, the use
   of the User-based Security Model STD 62, RFC 3414 [RFC3414] and the
   View-based Access Control Model STD 62, RFC 3415 [RFC3415] is
   recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity is properly configured so that:

      -  only those principals (users) having legitimate rights can
         access or modify the values of any MIB objects supported by
         that entity;

      -  the occurrence of particular events on the entity will be
         communicated appropriately;

      -  the entity responds appropriately and with due credence to
         events and information that have been communicated to it.

8.  References

8.1.  Normative References

   [RFC768]    Postel, J., "User Datagram Protocol", STD 6, RFC 768,
               August 1980.

   [RFC2578]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
               Rose, M. and S. Waldbusser, "Structure of Management
               Information Version 2 (SMIv2)", STD 58, RFC 2578, April
               1999.

   [RFC2579]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
               Rose, M. and S. Waldbusser, "Textual Conventions for
               SMIv2", STD 58, RFC 2579, April 1999.






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   [RFC2580]   McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
               Rose, M. and S. Waldbusser, "Conformance Statements for
               SMIv2", STD 58, RFC 2580, April 1999.

   [RFC3411]   Harrington, D., Presuhn, R. and B. Wijnen, "An
               Architecture for Describing Simple Network Management
               Protocol (SNMP) Management Frameworks", STD 62, RFC 3411,
               December 2002.

   [RFC3412]   Case, J., Harrington, D., Presuhn, R. and B. Wijnen,
               "Message Processing and Dispatching for the Simple
               Network Management Protocol (SNMP)", STD 62, RFC 3412,
               December 2002.

   [RFC3413]   Levi, D., Meyer, P. and B. Stewart, "Simple Network
               Management Protocol (SNMP) Applications", STD 62, RFC
               3413, December 2002.

   [RFC3414]   Blumenthal, U. and B. Wijnen, "The User-Based Security
               Model (USM) for Version 3 of the Simple Network
               Management Protocol (SNMPv3)", STD 62, RFC 3414, December
               2002.

   [RFC3415]   Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based
               Access Control Model (VACM) for the Simple Network
               Management Protocol (SNMP)", STD 62, RFC 3415, December
               2002.

   [RFC3417]   Presuhn, R., Case, J., McCloghrie, K., Rose, M. and S.
               Waldbusser, "Transport Mappings for the Simple Network
               Management Protocol", STD 62, RFC 3417, December 2002.

   [RFC3418]   Presuhn, R., Case, J., McCloghrie, K., Rose, M. and S.
               Waldbusser, "Management Information Base (MIB) for the
               Simple Network Management Protocol (SNMP)", STD 62, RFC
               3418, December 2002.

   [ASN1]      Information processing systems - Open Systems
               Interconnection - Specification of Abstract Syntax
               Notation One (ASN.1), International Organization for
               Standardization.  International Standard 8824, December
               1987.

8.2.  Informative References

   [FRAG]      Kent, C. and J. Mogul, "Fragmentation Considered
               Harmful," Proceedings, ACM SIGCOMM '87, Stowe, VT, August
               1987.



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   [RFC1155]   Rose, M. and K. McCloghrie, "Structure and Identification
               of Management Information for TCP/IP-based Internets",
               STD 16, RFC 1155, May 1990.

   [RFC1157]   Case, J., Fedor, M., Schoffstall, M. and J. Davin,
               "Simple Network Management Protocol", STD 15, RFC 1157,
               May 1990.

   [RFC1212]   Rose, M. and K. McCloghrie, "Concise MIB Definitions",
               STD 16, RFC 1212, March 1991.

   [RFC1213]   McCloghrie, K. and M. Rose, Editors, "Management
               Information Base for Network Management of TCP/IP-based
               internets: MIB-II", STD 17, RFC 1213, March 1991.

   [RFC1215]   Rose, M., "A Convention for Defining Traps for use with
               the SNMP", RFC 1215, March 1991.

   [RFC1901]   Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
               "Introduction to Community-based SNMPv2", RFC 1901,
               January 1996.

   [RFC2576]   Frye, R., Levi, D., Routhier, S. and B. Wijnen,
               "Coexistence between Version 1, Version 2, and Version 3
               of the Internet-Standard Network Management Framework",
               RFC 2576, March 2000.

   [RFC2863]   McCloghrie, K. and F. Kastenholz, "The Interfaces Group
               MIB", RFC 2863, June 2000.

   [RFC2914]   Floyd, S., "Congestion Control Principles", BCP 41, RFC
               2914, September 2000.

   [RFC3410]   Case, J., Mundy, R., Partain, D. and B. Stewart,
               "Introduction and Applicability Statements for Internet-
               Standard Management Framework", RFC 3410, December 2002.

9.  Changes from RFC 1905

   These are the changes from RFC 1905:

      -  Corrected spelling error in copyright statement;

      -  Updated copyright date;

      -  Updated with new editor's name and contact information;

      -  Added notice on intellectual property;



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      -  Cosmetic fixes to layout and typography;

      -  Added table of contents;

      -  Title changed;

      -  Updated document headers and footers;

      -  D