Model Based Metrics for Bulk Transport Capacity
draft-ietf-ippm-model-based-metrics-10

Document Type Active Internet-Draft (ippm WG)
Last updated 2017-03-17 (latest revision 2017-02-28)
Replaces draft-mathis-ippm-model-based-metrics
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IP Performance Working Group                                   M. Mathis
Internet-Draft                                               Google, Inc
Intended status: Experimental                                  A. Morton
Expires: September 1, 2017                                     AT&T Labs
                                                       February 28, 2017

            Model Based Metrics for Bulk Transport Capacity
               draft-ietf-ippm-model-based-metrics-10.txt

Abstract

   We introduce a new class of Model Based Metrics designed to assess if
   a complete Internet path can be expected to meet a predefined Target
   Transport Performance by applying a suite of IP diagnostic tests to
   successive subpaths.  The subpath-at-a-time tests can be robustly
   applied to critical infrastructure, such as network interconnections
   or even individual devices, to accurately detect if any part of the
   infrastructure will prevent paths traversing it from meeting the
   Target Transport Performance.

   Model Based Metrics rely on peer-reviewed mathematical models to
   specify a Targeted Suite of IP Diagnostic tests, designed to assess
   whether common transport protocols can be expected to meet a
   predetermined Target Transport Performance over an Internet path.

   For Bulk Transport Capacity, the IP diagnostics are built on test
   streams that mimic TCP over the complete path and statistical
   criteria for evaluating the packet transfer statistics of those
   streams.  The temporal structure of the test stream (bursts, etc)
   mimic TCP or other transport protocol carrying bulk data over a long
   path.  However they are constructed to be independent of the details
   of the subpath under test, end systems or applications.  Likewise the
   success criteria evaluates the packet transfer statistics of the
   subpath against criteria determined by protocol performance models
   applied to the Target Transport Performance of the complete path.
   The success criteria also does not depend on the details of the
   subpath, end systems or application.

   Model Based Metrics exhibit several important new properties not
   present in other Bulk Transport Capacity Metrics, including the
   ability to reason about concatenated or overlapping subpaths.  The
   results are vantage independent which is critical for supporting
   independent validation of tests by comparing results from multiple
   measurement points.

   This document does not define the IP diagnostic tests, but provides a
   framework for designing suites of IP diagnostic tests that are

Mathis & Morton         Expires September 1, 2017               [Page 1]
Internet-Draft             Model Based Metrics             February 2017

   tailored to confirming that infrastructure can meet the predetermined
   Target Transport Performance.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on September 1, 2017.

Copyright Notice

   Copyright (c) 2017 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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Version Control . . . . . . . . . . . . . . . . . . . . .   5
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     4.1.  TCP properties  . . . . . . . . . . . . . . . . . . . . .  18
     4.2.  Diagnostic Approach . . . . . . . . . . . . . . . . . . .  19
     4.3.  New requirements relative to RFC 2330 . . . . . . . . . .  20
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