Ntp Frequency Error Ppm Exceeds Tolerance
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Ntp Drift Tolerance
AM, Prasun Gera
Re: time reset, syncronisation lost and Large PPM values Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] tor wrote: > Something bothers ntpd so it ntp tolerance looses sync about every half hour. > The messages from two versions of
Tinker Panic 0
ntpd are given below. This is your problem: > Oct 19 17:19:09 srv3 ntpd[19356]: frequency initialized 500.000 from > /var/lib/ntp/drift
Ntp Drift File
> Oct 20 15:37:13 srv3 ntpd[20655]: frequency initialized 500.000 PPM from > /var/lib/ntp/drift > Oct 20 15:54:28 srv3 ntpd[20655]: frequency error 502 PPM exceeds tolerance > 500 PPM > Oct 20 16:09:31 https://www.redhat.com/archives/freeipa-users/2015-September/msg00157.html srv3 ntpd[20655]: frequency error 502 PPM exceeds tolerance > 500 PPM > Oct 20 16:13:47 srv3 ntpd[20655]: frequency error 502 PPM exceeds tolerance > 500 PPM > Oct 20 16:14:51 srv3 ntpd[20655]: frequency error 502 PPM exceeds tolerance > 500 PPM > Oct 20 16:15:57 srv3 ntpd[20655]: frequency error 502 PPM exceeds tolerance > 500 PPM > Oct 20 16:17:01 srv3 ntpd[20655]: frequency error 502 PPM http://lists.ntp.org/pipermail/questions/2005-October/007418.html exceeds tolerance > 500 PPM > Oct 20 16:18:06 srv3 ntpd[20655]: frequency error 502 PPM exceeds tolerance > 500 PPM You have acquired and institutionalized an absurd frequency correction (drift rate). This may have happened because the time was not set before starting ntpd, because the server stepped after ntpd was started, because you are running ntpd with the "-x" option, because ntpd was shut down or the system rebooted while ntpd was in the middle of slew correction, or a combination of these. You need to check your configuration and re-initialize things. 1) Make sure you are NOT using "-x" in the ntpd command line 2) In /etc/step-tickers, enter a list of reliable NTP servers that are likely to be up at the time your system boots 3) Make sure that all of the servers in /etc/ntp.conf are good and reporting similar times 4) # service ntpd stop 5) # rm /var/lib/ntp/drift 6) # service ntpd start 7) Wait for a day or 2 for things to stabilize without shutting down ntpd or rebooting the system -Tom Previous message: [ntp:questions] time reset, syncronisation lost and Large PPM values Next message: [ntp:questions] Re: time reset, syncr
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