Dave Hart wrote: > On Feb 26, 11:27 pm, "David J Taylor" > <david-tay...@blueyonder.neither- this-bit.nor-this.co.uk> wrote: >> Well, by observation, /all/ the servers are polled at 64s intervals, >> and not just the lan-gps-pps server. > > Since your clients are naturally preferring the stratum 1 on the same > LAN, that server's poll interval is clamping your overall poll > interval down with it. In the similar configuration of a refclock > plus internet servers, if you set minpoll 4 on a reference clock (and > no maxpoll) the similarly unselected internet servers are allowed to > progress to higher poll intervals. It may not be possible to achieve > the same without a reference clock.
Thats doesn't seem to happen with my FreeBSD system, if I am understanding you correctly. Admittedly I have ntpd 4.2.0-a, but all servers have a 64s polls even though there is no minpoll or maxpoll specified. My understanding was that having the physical GPS/PPS connection to that system forced this. > My suggestion is to pick one ntpd on your LAN to sacrafice the best > LAN timekeeping performance on while providing internet sources to > your LAN in case of problems with the FreeBSD refclock box. [snipped] > Cheers, > Dave Hart Dave, Thanks for your suggestions - which are certainly worthy of consideration. However, apart from the Vista PC, I consider the timekeeping on my existing Windows PCs adequate for my needs - I'm not after sub-millisecond accuracy. And of course, if I move to using one of the Windows PCs instead of the FreeBSD box as my stratum 1 server, I'll need to consider the configuration once again. The clients certainly lock to the local stratum 1 clock provided by the FreeBSD server, and it would be nice if the other servers listed in those clients could be automatically demoted to a "check every so often just for sanity" mode. Cheers, David _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
