A One-Way Delay Metric for IPPM
draft-morton-ippm-2679-bis-05

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Last updated 2014-07-04
Replaced by rfc7679, draft-ietf-ippm-2679-bis
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Network Working Group                                           G. Almes
Internet-Draft                                                 Texas A&M
Obsoletes: 2679 (if approved)                               S. Kalidindi
Intended status: Standards Track                                    Ixia
Expires: January 5, 2015                                    M. Zekauskas
                                                               Internet2
                                                          A. Morton, Ed.
                                                               AT&T Labs
                                                            July 4, 2014

                    A One-Way Delay Metric for IPPM
                     draft-morton-ippm-2679-bis-05

Abstract

   This memo (RFC 2679 bis) defines a metric for one-way delay of
   packets across Internet paths.  It builds on notions introduced and
   discussed in the IPPM Framework document, RFC 2330; the reader is
   assumed to be familiar with that document.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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
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   This Internet-Draft will expire on January 5, 2015.

Almes, et al.            Expires January 5, 2015                [Page 1]
Internet-Draft       A One-Way Delay Metric for IPPM           July 2014

Copyright Notice

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   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.  RFC 2679 bis  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  General Issues Regarding Time . . . . . . . . . . . . . .   6
   3.  A Singleton Definition for One-way Delay  . . . . . . . . . .   7
     3.1.  Metric Name:  . . . . . . . . . . . . . . . . . . . . . .   7
     3.2.  Metric Parameters:  . . . . . . . . . . . . . . . . . . .   7
     3.3.  Metric Units: . . . . . . . . . . . . . . . . . . . . . .   7
     3.4.  Definition: . . . . . . . . . . . . . . . . . . . . . . .   7
     3.5.  Discussion: . . . . . . . . . . . . . . . . . . . . . . .   8
     3.6.  Methodologies:  . . . . . . . . . . . . . . . . . . . . .   9
     3.7.  Errors and Uncertainties: . . . . . . . . . . . . . . . .  10
       3.7.1.  Errors or uncertainties related to Clocks . . . . . .  10
       3.7.2.  Errors or uncertainties related to Wire-time vs Host-
               time  . . . . . . . . . . . . . . . . . . . . . . . .  11
       3.7.3.  Calibration . . . . . . . . . . . . . . . . . . . . .  12
     3.8.  Reporting the metric: . . . . . . . . . . . . . . . . . .  14
       3.8.1.  Type-P  . . . . . . . . . . . . . . . . . . . . . . .  14
       3.8.2.  Loss Threshold  . . . . . . . . . . . . . . . . . . .  14
       3.8.3.  Calibration Results . . . . . . . . . . . . . . . . .  15
       3.8.4.  Path  . . . . . . . . . . . . . . . . . . . . . . . .  15
   4.  A Definition for Samples of One-way Delay . . . . . . . . . .  15
     4.1.  Metric Name:  . . . . . . . . . . . . . . . . . . . . . .  16
     4.2.  Metric Parameters:  . . . . . . . . . . . . . . . . . . .  16
     4.3.  Metric Units: . . . . . . . . . . . . . . . . . . . . . .  16
     4.4.  Definition: . . . . . . . . . . . . . . . . . . . . . . .  16
     4.5.  Discussion: . . . . . . . . . . . . . . . . . . . . . . .  17
     4.6.  Methodologies:  . . . . . . . . . . . . . . . . . . . . .  17
     4.7.  Errors and Uncertainties: . . . . . . . . . . . . . . . .  18
     4.8.  Reporting the metric: . . . . . . . . . . . . . . . . . .  18
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