I'm sorry, I was writing this in Google Groups web interface. Maybe I didn't explain myself correctly: I don't want to use external time sources, only NTP, with the best tuning (and not tunning :D) possible. But I do have access to four stratum 1 servers, using GPS and PPS inputs, which I use as servers to synch my hosts to.
Kind Regards, Pedro On Friday, October 26, 2012 3:44:13 PM UTC+1, David Woolley wrote: > pret3n...@gmail.com wrote: > > > > > > my name is Pedro Queirós and I'm currently working on my master > > > thesis > > + related to open source probes to measure the QoS of internet link. > > > > [ Your lines are too long. In internet mail, and other standards based > > on it, CRLF delimits lines, not paragraphs. ] > > > > > One of the tools I'm using is OWAMP > > + (http://www.internet2.edu/performance/owamp/), to measure one-way delay > > + between hosts. This tool requires NTP running and synchronizing clocks > > + so that it can measure correctly (to a certain point) the one-way delay > > + between hosts. > > > > You need directly attached radio clocks, and for GPS, you will need PPS. > > You will need these on the actual machine, although, if you have > > older Ethernet hardware, the same LAN may be better than nothing. NTP > > cannot correct for systematic one way delays. _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions