Enterprise Profile for the Precision Time Protocol With Mixed Multicast and Unicast Messages
draft-ietf-tictoc-ptp-enterprise-profile-08

Document Type Active Internet-Draft (tictoc WG)
Last updated 2017-09-28
Stream IETF
Intended RFC status Internet Standard
Formats plain text pdf html bibtex
Stream WG state WG Document (wg milestone: Mar 2016 - 1588v2 profile, if n... )
Document shepherd Karen O'Donoghue
IESG IESG state I-D Exists
Consensus Boilerplate Yes
Telechat date
Responsible AD (None)
Send notices to (None)
INTERNET-DRAFT          Enterprise Profile for PTP        September 2017

TICTOC Working Group                                         Doug Arnold
Internet Draft                                              Meinberg-USA
Intended status: Standards Track                          Heiko Gerstung
                                                                Meinberg
Expires: March 28, 2018                               September 28, 2017         

          Enterprise Profile for the Precision Time Protocol
               With Mixed Multicast and Unicast Messages

           draft-ietf-tictoc-ptp-enterprise-profile-08.txt

Status of this Memo
     This Internet-Draft is submitted in full conformance with the
     provisions of BCP 78 and BCP 79. This document may not be
     modified, and derivative works of it may not be created, except to
     publish it as an RFC and to translate it into languages other than
     English.

     Internet-Drafts are working documents of the Internet Engineering
     Task Force (IETF), its areas, and its working groups.  Note that
     other groups may also distribute working documents as Internet-
     Drafts.
    
     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."

     The list of current Internet-Drafts can be accessed at
     http://www.ietf.org/ietf/1id-abstracts.txt

     The list of Internet-Draft Shadow Directories can be accessed at
     http://www.ietf.org/shadow.html

     This Internet-Draft will expire on March 28, 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
     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.

Arnold and Gerstung           September 28, 2017                [Page 1]

 
Internet-Draft          Enterprise Profile for PTP        September 2017

Abstract

    This document describes a profile for the use of the Precision
    Time Protocol in an IPV4 or IPv6 Enterprise information system
    environment.  The profile uses the End to End Delay Measurement
    Mechanism, allows both multicast and unicast Delay Request and Delay
    Response Messages.

    
Table of Contents

1.   Introduction                              2
2.   Conventions used in this document         3
3.   Technical Terms                           3
4.   Problem Statement                         5
5.   Network Technology                        6        
6.   Time Transfer and Delay Measurement       7
7.   Default Message Rates                     8
8.   Requirements for Master Clocks            8
9.   Requirements for Slave Clocks             8
10.  Requirements for Transparent Clocks       9
11.  Requirements for Boundary Clocks          9
12.  Management and Signaling Messages         9
13.  Forbidden PTP Options                     9
14.  Interoperation with Other PTP Profiles   10
15.  Profile Identification                   10
16.  Security Considerations                  10
17.  IANA Considerations                      10
18.  References                               11
     18.1.  Normative References              11
     18.2.  Informative References            11
19. Acknowledgments                           11
20. Authors addresses                         12

1.  Introduction

     The Precision Time Protocol ("PTP"), standardized in IEEE 1588,
     has been designed in its first version (IEEE 1588-2002) with the
     goal to minimize configuration on the participating nodes. Network
     communication was based solely on multicast messages, which unlike
     NTP did not require that a receiving node ("slave clock") in
     [IEEE1588] needs to know the identity of the time sources in the
     network (the Master Clocks).
         
     The so-called "Best Master Clock Algorithm" ([IEEE1588] Clause
     9.3), a mechanism that all participating PTP nodes must follow,
     set up strict rules for all members of a PTP domain to determine
     which node shall be the active sending time source (Master Clock).
     Although the multicast communication model has advantages in
     smaller networks, it complicated the application of PTP in larger
     networks, for example in environments like IP based
Show full document text