On 29 Jun, 20:07, Harlan Stenn <[EMAIL PROTECTED]> wrote: > >>> In article <[EMAIL PROTECTED]>, Geir G <[EMAIL PROTECTED]> writes: > > Geir> Hello, NTP configuration: > > Geir> Client: ntpd version [EMAIL PROTECTED] running on Windows XP Servers: 2 > Geir> identical stratum 1 servers with GPS antennas directly connected > > Are these 2 servers peering with each other? They should be.
Please note that the servers are embedded devices and (at least to my knowledge) don't run the NTP reference implementation. I don't think they support peering. > > Geir> I want comments on the following observations. Unfortunately, the > Geir> system is currently not available, hence I cannot supply ntpq > Geir> diagnostics. I know that 2 servers is the worst possible > Geir> configuration, it is not necessary to comment that. > > Geir> For some reason one NTP server lost its GPS synch. It switched to > Geir> internal clock started reporting stratum 12 when this happened. The > Geir> other server was perfectly synchronized and reported stratum 1. > Geir> Problem: ntpd rejects both servers and considers itself not > Geir> synchronized. > > This tells me it was not peering with the other S1 server. If it was, it > would report S2 and follow the time of the other S1 server. OK, you are correct. > > Geir> Questions: > > Geir> 1. Does the NTP server behave correctly when changing its stratum to > Geir> 12? Should it perform different/other actions when it considers itself > Geir> not synchronized? > > If it is reporting S12 then you must have it configured to use its local > clock as a refclock. ntpd is correctly reporting that it is sync'd to its > local refclock. > > ntpd is behaving as designed. It may be that your configuration is > incorrect. No specific configuration was done to the server to make it use its local clock. It seems this is the the default behavior for the device. > > Geir> 2. Does ntpd behave correctly? Is a server's stratum used in any way > Geir> in ntpd's clock selection process? > > Yes. Is that 'Yes' to both questions? > > Have you visitedhttp://support.ntp.org/Support/ConfiguringNTP? > > H Yes, I have. But sometimes it is more convenient to ask the experts directly. Thank you for your answers Harlan. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
