On 9 Feb, 13:44, Joseph Gwinn <joegw...@comcast.net> wrote: > In article <c2bcn.37983$ym4.23...@text.news.virginmedia.com>, > "David J Taylor" > <david-tay...@blueyonder.delete-this-bit.and-this-part.co.uk.invalid> > > > > wrote: > > > I've setup an NTP server in the south east asia region synchonising > > > with regional NTP servers as well as a couple of servers I am > > > responsible for in the US. > > > > remote st t when poll reach delay offset jitter > > > ============================================== > > > +Japan 1 u 454 1024 377 87.402 -0.560 0.056 > > > *Japan 1 u 476 1024 377 87.277 -0.810 1.542 > > > -NorthAmerica 2 u 427 1024 377 285.387 -17.741 5.084 > > > -NorthAmerica 2 u 429 1024 377 307.208 -17.061 0.083 > > > > Is the above delta seen between Japanese and North American time > > > sources purely the delta between the outbound / return network path or > > > something else? > > > > Chris > > > Chris, > > > Most likely asymmetrical paths, yes. > > The wide area networks used for international connections are typically > SONET rings, which are inherently asymmetrical. > > As one works around a ring, the poll response time is constant (being > the perimeter of the ring), while the out and back times vary with > position on the ring with respect to the server one is polling. > > Joe Gwinn
Thanks. ChrisC. _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
