[time-nuts] FW: IEEE 1588

Poul-Henning Kamp phk at phk.freebsd.dk
Wed May 3 01:13:39 EDT 2006

In message <001901c66e61$bbd4db10$7f01000a at fakie>, "Christopher Hoover" writes:
>Has anyone been following the recently issued IEEE 1588 Precise Time
>Protocol (PTP) standard?  

Yes, I have.

There's a $1000 license fee to HP for patents before you can start
to play with it and no waiver is possible, so Open Source not
an option.

>>From what I've read, implementations have demonstrated 10-100 nanosecond
>synchronization between computers connected via Ethernet.

Provided you have hardware support in the ethernet controller.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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