Support of IEEE-1588 time stamp format in Two-Way Active Measurement Protocol (TWAMP)
draft-ietf-ippm-twamp-time-format-06

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Last updated 2017-04-18 (latest revision 2017-04-12)
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Network Working Group                                          G. Mirsky
Internet-Draft                                                 ZTE Corp.
Intended status: Standards Track                               I. Meilik
Expires: October 14, 2017                                       Broadcom
                                                          April 12, 2017

  Support of IEEE-1588 time stamp format in Two-Way Active Measurement
                            Protocol (TWAMP)
                  draft-ietf-ippm-twamp-time-format-06

Abstract

   This document describes an OPTIONAL feature for active performance
   measurement protocols allowing use of the Precision Time Protocol
   time stamp format defined in IEEE-1588v2-2008, as an alternative to
   the Network Time Protocol that is currently used.

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Internet-Draft       1588 time stamp format in TWAMP          April 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions used in this document . . . . . . . . . . . .   3
       1.1.1.  Terminology . . . . . . . . . . . . . . . . . . . . .   3
       1.1.2.  Requirements Language . . . . . . . . . . . . . . . .   3
   2.  OWAMP and TWAMP Extensions  . . . . . . . . . . . . . . . . .   3
     2.1.  Timestamp Format Negotiation in Setting Up Connection in
           OWAMP . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Timestamp Format Negotiation in Setting Up Connection in
           TWAMP . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.3.  OWAMP-Test and TWAMP-Test Update  . . . . . . . . . . . .   5
       2.3.1.  Consideration for TWAMP Light mode  . . . . . . . . .   6
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   One-Way Active Measurement Protocol (OWAMP) [RFC4656] defines that
   only the NTP [RFC5905] format of a time stamp can be used in OWAMP-
   Test protocol.  Two-Way Active Measurement Protocol (TWAMP) [RFC5357]
   adopted the OWAMP-Test packet format and extended it by adding a
   format for a reflected test packet.  Both the sender's and
   reflector's packets time stamps are expected to follow the 64-bit
   long NTP format [RFC5905].  NTP, when used over Internet, typically
   achieves clock accuracy of about 5ms to 100ms.  Surveys conducted
   recently suggest that 90% devices achieve accuracy of better than 100
   ms and 99% - better than 1 sec.  It should be noted that NTP
   synchronizes clocks on the control plane, not on data plane.
   Distribution of clock within a node may be supported by independent
   NTP domain or via interprocess communication in multiprocessor
   distributed system.  Any of the mentioned solutions will be subject
   to additional queuing delays that negatively affect data plane clock
   accuracy.

   Precision Time Protocol (PTP) [IEEE.1588.2008] has gained wide
   support since the development of OWAMP and TWAMP.  PTP, using on-path
   support and other mechanisms, allows sub-microsecond clock accuracy.
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