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Precision Time Protocol Enterprise Profile

Precision Time Protocol Enterprise Profile. draft-ietf-tictoc-ptp-enterprise-profile-02.txt IETF 86, Orlando , March 2013 Doug Arnold, Symmetricom Heiko Gerstung, Meinberg. Overview of Draft. Designed for Enterprise IT networks

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Precision Time Protocol Enterprise Profile

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  1. Precision Time Protocol Enterprise Profile draft-ietf-tictoc-ptp-enterprise-profile-02.txt IETF 86, Orlando, March 2013 Doug Arnold, Symmetricom Heiko Gerstung, Meinberg

  2. Overview of Draft • Designed for Enterprise IT networks • Early adopters of PTP in enterprise are High Frequency Trading Firms • At least two PTP equipment vendors currently support most of proposed profile as proprietary solutions • Originally proposed by Network Architect from IMF • Major PTP properties • Layer 3 • IPv4 or IPv6 • End to end delay request mechanism • Multicast sync and announce messages • Delay requests/responses can be multicast or unicast • Unicastrecommended • No unicastnegociation

  3. Current Status • First draft submitted to IETF TICTOC for comments • 74 comments posted (though some are repeats) • Thanks to Laurent Montini, Tal Mizrahi, John Fletcher, John Eidson, Silvana Rodrigues, Stefano Ruffini, Samer Darras for reviewing draft • Expect to submit updated draft before next IETF meeting, addressing all comments

  4. General Comments Q: What is specific to enterprise networks to require a profile? A: PTP has a large number of options • not all compatible • does not work well without making choices • Many enterprise system designers requesting a similar configuration Q: Does the proposed profile contain too many options and modes? A: We want to cover as many use cases as possible, as long as Enterprise profile compliant clocks will interoperate.

  5. General Comments (cont) Q: Where does ±1 µs requirement come from? A: Commonly sited as a desirable and achievable goal for PTP systems. • For example ISPCS 2011 Keynote Address: “Time Synchronization and Financial Trading,” Peter Lankford, Securities Technologies Analysis Center Q: Without unicast negotiation, how will message rates be determined? A: Message rates will be determined by configuring each ports. Master ports will answer delay requests to the best of their ability. • Less robust than telecom profile • Less configuration required than telecom profile

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