Definitions of Managed Objects for Packet Sampling
RFC 6727

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Internet Engineering Task Force (IETF)                     T. Dietz, Ed.
Request for Comments: 6727                               NEC Europe Ltd.
Category: Standards Track                                      B. Claise
ISSN: 2070-1721                                      Cisco Systems, Inc.
                                                              J. Quittek
                                                         NEC Europe Ltd.
                                                            October 2012

           Definitions of Managed Objects for Packet Sampling

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 extensions to the IPFIX-SELECTOR-MIB
   module.  For IP Flow Information eXport (IPFIX) implementations that
   use Packet Sampling (PSAMP) techniques, this memo defines the PSAMP-
   MIB module containing managed objects for providing information on
   applied packet selection functions and their parameters.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6727.

Dietz, et al.                Standards Track                    [Page 1]
RFC 6727                        PSAMP MIB                   October 2012

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  The Internet-Standard Management Framework . . . . . . . . . .  3
   2.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Overview of PSAMP Documents  . . . . . . . . . . . . . . . . .  4
   4.  Related IPFIX Documents  . . . . . . . . . . . . . . . . . . .  4
   5.  Structure of the PSAMP MIB module  . . . . . . . . . . . . . .  4
     5.1.  Textual Conventions  . . . . . . . . . . . . . . . . . . .  5
     5.2.  Packet Selection Functions . . . . . . . . . . . . . . . .  6
       5.2.1.  Systematic Count-Based Sampling  . . . . . . . . . . .  6
       5.2.2.  Systematic Time-Based Sampling . . . . . . . . . . . .  6
       5.2.3.  Random n-out-of-N Sampling . . . . . . . . . . . . . .  7
       5.2.4.  Uniform Probabilistic Sampling . . . . . . . . . . . .  7
       5.2.5.  Property Match Filtering . . . . . . . . . . . . . . .  7
       5.2.6.  Hash-Based Filtering . . . . . . . . . . . . . . . . .  8
   6.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  9
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 25
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 25
   9.  Acknowledgment . . . . . . . . . . . . . . . . . . . . . . . . 26
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 26
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 26
     10.2. Informative References . . . . . . . . . . . . . . . . . . 27

Dietz, et al.                Standards Track                    [Page 2]
RFC 6727                        PSAMP MIB                   October 2012

1.  The Internet-Standard 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,
   RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58,RFC 2580
   [RFC2580].

2.  Introduction

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and