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IP Performance Metrics (IPPM) Standard Advancement Testing
RFC 6576

Internet Engineering Task Force (IETF)                      R. Geib, Ed.
Request for Comments: 6576                              Deutsche Telekom
BCP: 176                                                       A. Morton
Category: Best Current Practice                                AT&T Labs
ISSN: 2070-1721                                                R. Fardid
                                                    Cariden Technologies
                                                            A. Steinmitz
                                                        Deutsche Telekom
                                                              March 2012

       IP Performance Metrics (IPPM) Standard Advancement Testing

Abstract

   This document specifies tests to determine if multiple independent
   instantiations of a performance-metric RFC have implemented the
   specifications in the same way.  This is the performance-metric
   equivalent of interoperability, required to advance RFCs along the
   Standards Track.  Results from different implementations of metric
   RFCs will be collected under the same underlying network conditions
   and compared using statistical methods.  The goal is an evaluation of
   the metric RFC itself to determine whether its definitions are clear
   and unambiguous to implementors and therefore a candidate for
   advancement on the IETF Standards Track.  This document is an
   Internet Best Current Practice.

Status of This Memo

   This memo documents an Internet Best Current Practice.

   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
   BCPs 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/rfc6576.

Geib, et al.              Best Current Practice                 [Page 1]
RFC 6576            IPPM Standard Advancement Testing         March 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. Introduction ....................................................3
      1.1. Requirements Language ......................................5
   2. Basic Idea ......................................................5
   3. Verification of Conformance to a Metric Specification ...........7
      3.1. Tests of an Individual Implementation against a Metric
           Specification ..............................................8
      3.2. Test Setup Resulting in Identical Live Network
           Testing Conditions .........................................9
      3.3. Tests of Two or More Different Implementations
           against a Metric Specification ............................15
      3.4. Clock Synchronization .....................................16
      3.5. Recommended Metric Verification Measurement Process .......17
      3.6. Proposal to Determine an Equivalence Threshold for
           Each Metric Evaluated .....................................20
   4. Acknowledgements ...............................................21
   5. Contributors ...................................................21
   6. Security Considerations ........................................21
   7. References .....................................................21
      7.1. Normative References ......................................21
      7.2. Informative References ....................................23
   Appendix A.  An Example on a One-Way Delay Metric Validation ......24
     A.1.  Compliance to Metric Specification Requirements ...........24
     A.2.  Examples Related to Statistical Tests for One-Way Delay ...25
   Appendix B.  Anderson-Darling K-sample Reference and 2 Sample
                C++ Code .............................................27
   Appendix C.  Glossary .............................................36

Geib, et al.              Best Current Practice                 [Page 2]

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