Large scale PTP: How big can it get?

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Conference Paper
Content Type: Original Research
Volume: 2016, No. 10, pp. 1–13
Abstract: Precision Time Protocol (PTP) is a standard to synchronize clocks across a network with sub-microsecond 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 over 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: 2016-10-25
DOI: 10.5594/M001705
ISBN: Print: 978-1-61482-957-7
Link: https://doi.org/10.5594/M001705
Author(s): Nicholas CiarleglioArista Networks, 5453 Great America Parkway, Santa Clara, CA 95054
Thomas EdwardsFOX, 10201 W. Pico Blvd, Los Angeles CA, 90035
Robert WelchArista Networks, 5453 Great America Parkway, Santa Clara, CA 95054
Keyword(s): ST 2059-2, IEEE-1588, PTP, Ethernet, 10GbE, Boundary Clock, Transparent Clock, Grandmaster, Two-step
Copyright: © 2016 Society of Motion Picture and Television Engineers, Inc.

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SMPTE ST 2059-2:2015 [Superseded]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 Meetings and Conferences ( October 2016); SMPTE, 2016, ISBN: 978-1-61482-957-7. Available at https://doi.org/10.5594/M001705

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Nicholas Ciarleglio, Thomas Edwards, and Robert Welch; Large scale PTP: How big can it get?, SMPTE Meetings and Conferences ( October 2016); SMPTE, 2016, ISBN: 978-1-61482-957-7. Available at https://doi.org/10.5594/M001705

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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 Meetings and Conferences ( October 2016); SMPTE, 2016, ISBN: 978-1-61482-957-7. Available at <a href="https://doi.org/10.5594/M001705" target="_blank" rel="noopener">https://doi.org/10.5594/M001705</a></span>

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Nicholas Ciarleglio, Thomas Edwards, and Robert Welch; <cite id="bib-10-5594-m001705">Large scale PTP: How big can it get?</cite>, SMPTE Meetings and Conferences ( October 2016); SMPTE, 2016, ISBN: 978-1-61482-957-7
<span class="doi">10.5594/M001705</span>
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