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Support of the IEEE 1588 Timestamp Format in a Two-Way Active Measurement Protocol (TWAMP) (RFC8186)

IP.com Disclosure Number: IPCOM000250188D
Original Publication Date: 2017-Jun-01
Included in the Prior Art Database: 2017-Jun-09
Document File: 16 page(s) / 18K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Mirsky: AUTHOR [+2]


The One-Way Active Measurement Protocol (OWAMP) [RFC4656] defines that only the NTP format [RFC5905] of a timestamp can be used in the OWAMP-Test protocol. The 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 timestamps are expected to follow the 64-bit-long NTP format [RFC5905]. NTP, when used over the Internet, typically achieves clock accuracy within 5 ms to 100 ms. Surveys conducted recently suggest that 90% of devices achieve accuracy better than 100 ms and 99% of devices achieve accuracy 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 an independent NTP domain or via interprocess communication in a multiprocessor distributed system. Any of the mentioned solutions will be subject to additional queuing delays that negatively affect data-plane clock accuracy.

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Internet Engineering Task Force (IETF)                         G. Mirsky Request for Comments: 8186                                     ZTE Corp. Category: Standards Track                                      I. Meilik ISSN: 2070-1721                                                 Broadcom                                                                June 2017

              Support of the IEEE 1588 Timestamp Format in a               Two-Way Active Measurement Protocol (TWAMP)


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

Status of This Memo

   This is an Internet Standards Track document.

   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    Internet Standards is available in Section 2 of RFC 7841.

   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/rfc8186.

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    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.

 Mirsky & Meilik              Standards Track                    [Page 1]
 RFC 8186             1588 Timestamp Format in TWAMP            June 2017

 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 Negot...