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SPTP does look a lot like NTP over PTP. I’m guessing they deployed this last year when nothing like it existed - the ietf draft (dated Jan 24, 2024) came much later after. They might even be involved with it. Anyways, it’s nice to see progress towards a simpler protocol that retains the precision of PTP.

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How does SPTP compare to CERN's WhiteRabbit, which is built on PTP? https://en.wikipedia.org/wiki/White_Rabbit_Project

FWIW, from "50 years later, is two-phase locking the best we can do?" https://news.ycombinator.com/item?id=37712506 :

> TIL there's a regular heartbeat in the quantum foam; there's a regular monotonic heartbeat in the quantum Rydberg wave packet interference; and that should be useful for distributed applications with and without vector clocks and an initial time synchronization service

It's older than that, but not sure how much older.

The first draft of the idea is from June 2021:

* https://datatracker.ietf.org/doc/draft-mlichvar-ntp-over-ptp...

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