Model Based Metrics for Bulk Transport Capacity
draft-ietf-ippm-model-based-metrics-13

Document Type Active Internet-Draft (ippm WG)
Last updated 2017-11-08 (latest revision 2017-09-15)
Replaces draft-mathis-ippm-model-based-metrics
Stream IETF
Intended RFC status Experimental
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Stream WG state Submitted to IESG for Publication (wg milestone: Jul 2016 - Submit draft on mode... )
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IP Performance Working Group                                   M. Mathis
Internet-Draft                                               Google, Inc
Intended status: Experimental                                  A. Morton
Expires: March 19, 2018                                        AT&T Labs
                                                      September 15, 2017

            Model Based Metrics for Bulk Transport Capacity
               draft-ietf-ippm-model-based-metrics-13.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 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 using test
   streams and statistical criteria for evaluating the packet transfer
   that mimic TCP over the complete path.  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.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

Mathis & Morton          Expires March 19, 2018                 [Page 1]
Internet-Draft             Model Based Metrics            September 2017

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on March 19, 2018.

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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Version Control . . . . . . . . . . . . . . . . . . . . .   5
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     4.1.  TCP properties  . . . . . . . . . . . . . . . . . . . . .  18
     4.2.  Diagnostic Approach . . . . . . . . . . . . . . . . . . .  20
     4.3.  New requirements relative to RFC 2330 . . . . . . . . . .  21
   5.  Common Models and Parameters  . . . . . . . . . . . . . . . .  22
     5.1.  Target End-to-end parameters  . . . . . . . . . . . . . .  22
     5.2.  Common Model Calculations . . . . . . . . . . . . . . . .  23
     5.3.  Parameter Derating  . . . . . . . . . . . . . . . . . . .  24
     5.4.  Test Preconditions  . . . . . . . . . . . . . . . . . . .  24
   6.  Generating test streams . . . . . . . . . . . . . . . . . . .  25
     6.1.  Mimicking slowstart . . . . . . . . . . . . . . . . . . .  26
     6.2.  Constant window pseudo CBR  . . . . . . . . . . . . . . .  27
     6.3.  Scanned window pseudo CBR . . . . . . . . . . . . . . . .  28
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