Large-Scale PTP: How Big Can It Get?

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE Mot. Imag. J
Volume: 126, No. 4, pp. 1–7
Abstract: Precision Time Protocol (PTP) is a standard to synchronize clocks across a network with submicrosecond accuracy. In the area of professional media networking, PTP is poised to replace traditional black burst sync methods, allowing both media and synchronization to be carried over the same network connection. To be useful, vendor PTP protocol implementations must scale to the size of the largest broadcast plants. This paper describes the results of PTP tests with more than 1,000 “slave” clocks, including an examination of scaling performance with both boundary and transparent modes of operation on the network devices. It also discusses the pros and cons of the end-to-end delay and peer delay mechanisms, and provides details on the performance seen using a range of sync message intervals and delay request intervals. These tests suggest several best practices for large-scale PTP installations using commercial-off-the-shelf (COTS) equipment, and provide real-world data to assist in planning and implementing a professional media Ethernet network leveraging PTP synchronization.
Publication Date: 2017-05-01
DOI: 10.5594/JMI.2017.2681818
ISSN: Print: 1545-0279 | Electronic: 2160-2492
Link: https://doi.org/10.5594/JMI.2017.2681818
Author(s): Nicholas Ciarleglio
Thomas Edwards
Robert Welch
Keyword(s): ST 2059-2, IEEE-1588, PTP, Ethernet, 10GbE, Boundary Clock, Transparent Clock, Grandmaster, Two-step
Copyright: © 2017 SMPTE

Bibliographic Reference(s)

IEEE.STD1588.2008 — IEEE Std 1588-2008, IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, 2008 EXTERNAL
SMPTE ST 2059-2:2015 [Superseded]

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Nicholas Ciarleglio, Thomas Edwards, and Robert Welch; Large-Scale PTP: How Big Can It Get?, SMPTE Motion Imaging Journal ( Volume: 126, Issue: 4, 2017); SMPTE, 2017. Available at https://doi.org/10.5594/JMI.2017.2681818

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Nicholas Ciarleglio, Thomas Edwards, and Robert Welch; Large-Scale PTP: How Big Can It Get?, SMPTE Motion Imaging Journal ( Volume: 126, Issue: 4, 2017); SMPTE, 2017. Available at https://doi.org/10.5594/JMI.2017.2681818

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<span class="citation">Nicholas Ciarleglio, Thomas Edwards, and Robert Welch; <cite>Large-Scale PTP: How Big Can It Get?</cite>, SMPTE Motion Imaging Journal ( Volume: 126, Issue: 4, 2017); SMPTE, 2017. Available at <a href="https://doi.org/10.5594/JMI.2017.2681818" target="_blank" rel="noopener">https://doi.org/10.5594/JMI.2017.2681818</a></span>

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Nicholas Ciarleglio, Thomas Edwards, and Robert Welch; Large-Scale PTP: How Big Can It Get?, SMPTE Motion Imaging Journal ( Volume: 126, Issue: 4, 2017); SMPTE, 2017
doi: 10.5594/JMI.2017.2681818
url: https://doi.org/10.5594/JMI.2017.2681818

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<li>
Nicholas Ciarleglio, Thomas Edwards, and Robert Welch; <cite id="bib-10-5594-jmi-2017-2681818">Large-Scale PTP: How Big Can It Get?</cite>, SMPTE Motion Imaging Journal ( Volume: 126, Issue: 4, 2017); SMPTE, 2017
<span class="doi">10.5594/JMI.2017.2681818</span>
</li>