Hi, - my network contains only one switch, and all the node are in the same room. Thus I don't think cabling is a problem. I still have to check the latency of the switch.
- I can't use a GPS or other material. I though I wouldn't need any because I don't won't a great accuracy with the real time, just between my nodes. I also think it would have been easier and better to have a common high precision time source (GPS)... But I can't afford that ;) Do you have an explanation of the so different performances observed in your NTP synchronisations ? - I'm going to look at chrony, which at first glance seems usable in my case. - I am already using the -x option, to be certain to avoid any step. Maxime On Wed, Apr 23, 2008 at 2:10 AM, Unruh <[EMAIL PROTECTED]> wrote: > Steve Kostecke <[EMAIL PROTECTED]> writes: > > >On 2008-04-22, Unruh <[EMAIL PROTECTED]> wrote: > > >> Steve Kostecke <[EMAIL PROTECTED]> writes: > >> > >> ??? In my experience, on a Lan ntpd shows an internode offset of about > >> 5-15 usec, and on the internet (ADSL) an offset of about 200usec. > > >Here's an aggregated plot of the node offsets on my LAN over the last 24 > >hours. I see +3/-5 milliseconds, not anything near 5-15 microseconds. > > > > http://support.ntp.org/bin/viewfile/Users/SteveKostecke?rev=1;filename=typical_aggregate_lan_offsets.png > > I agree those are pretty bad. HOw are they hooked up? It looks like one of > the hops is via a telephone modem! > > See www.theory.physics/chrony/chrony.html > Mind you those are running with maxpoll 7 not maxpoll 10 (Its my lan and > ntp server, and I'll do what I want to.) > > > >-- > >Steve Kostecke <[EMAIL PROTECTED]> > >NTP Public Services Project - http://support.ntp.org/ > > _______________________________________________ > questions mailing list > [email protected] > https://lists.ntp.org/mailman/listinfo/questions > -- Maxime Louvel 0044 7964 5555 80 43 Allen road Whitemore reans WV60AW Wolverhampton United Kingdom _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
