On Sat, Apr 16, 2016 at 03:07:45PM +0200, Max Grobecker wrote: > Hi, > > Am 16.04.2016 um 10:20 schrieb Hal Murray: > > The monitoring system is on the west coast, Los Angeles. The NIST servers > > are on the east coast. My guess would be asymmetric routing explains the > > offset in the monitoring graphs. > > Routing should be totally insignificant to the NTP offsets, since NTP measures > the packet round-trip and recalculates the timestamps received. > So, even if the packet needs thousands of milliseconds to get around the > internet, > your time should be +/- 1ms accurate.
That only works properly if the delay is the same the same in both direction. Sometimes you can get a totally different route back and so also have a total different delay. NTP has no way to compensate for that. Kurt _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
