The only switch I know that supports IEEE 1588 is the Cisco CGS 2520 and it was about 10 k before discount. It's intended for use in smart grid applications
NICs are about 500 each from a variety of vendors. Altera makes most of the silicon Sent from my iPhone On Jul 31, 2013, at 12:19 AM, "Bill Hawkins" <b...@iaxs.net> wrote: > Group, > > Has anyone used IEEE 1588 to synchronize clocks on an Ethernet network? > > I was involved in the design of time sync for Foundation Fieldbus circa > 2000. > We needed one millisecond accuracy, so we went with SNTP on local > networks. > I've just seen an ad for a switch that can do 1588, and looked up what > it does. > > Microsecond accuracy is impressive, but what does it cost? > > Industrial sensors are generally sampled at about 10 millisecond > intervals out > to several seconds. SNTP would appear to be very adequate for time > stamps as > there is uncertainty introduced by when the computer gets around to > sampling > the sensor in its sampling and control cycle. > > Any thoughts appreciated. > > Bill Hawkins > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
