[ntp:questions] NTP behaviour when server is not synchronized
stenn at ntp.isc.org
Fri Jun 29 18:07:26 UTC 2007
>>> In article <1183138077.657644.124300 at n2g2000hse.googlegroups.com>, Geir G <geir.guldstein at start.no> writes:
Geir> Hello, NTP configuration:
Geir> Client: ntpd version 4.2.2 at 1.1532 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.
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
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.
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
ntpd is behaving as designed. It may be that your configuration is
Geir> 2. Does ntpd behave correctly? Is a server's stratum used in any way
Geir> in ntpd's clock selection process?
Have you visited http://support.ntp.org/Support/ConfiguringNTP ?
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