Frequency Error 507 Ppm Exceeds Tolerance 500 Ppm
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Frequency Error Exceeds Tolerance 500 Ppm
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Ntp Ppm
Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody ntp tolerance can answer The best answers are voted up and rise to the top ntpd frequency error -1732 PPM exceeds tolerance 500 PPM up vote 1 down vote favorite I'm getting this error on my PC: frequency error -1732 PPM exceeds tolerance 500 PPM Any ideas? windows ntpd share|improve this question asked Apr 12 '12 at 8:44 user626528 154127 add a comment| 2 Answers 2 ntp drift tolerance active oldest votes up vote 6 down vote accepted This means that the difference between your local time and the server you're syncing with has exceed ntpd's limit. ntpd will only sync the local time if it is relatively close to the time server. This is why Red Hat (as an example) uses ntpdate the first time you start the ntpd service to set the local time to be in the right ball park. You should also make sure that the ntp servers you are syncing with are relatively close. You can do these steps manually if you want (e.g. you're not running Red Hat which includes the ntpdate step in it's restart script): # /etc/init.d/ntpd stop # ntpdate
PPM... Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Kit Plummer wrote: > > > On Feb 3, 2005, at 3:42 PM, Richard B. Gilbert wrote: > >> Kit Plummer wrote: >> >>> FWIW, here
Tinker Panic 0
is a snip of my ntp.log file: >>> >>> 3 Feb 10:00:14 ntpd[412]: kernel frequency error wiki time sync enabled 0001 >>> 3 Feb 10:04:33 ntpd[412]: synchronized to GPS_BANC(0), stratum=0 >>> 3 Feb 10:36:45 ntpd[412]: time reset -0.873229 s
Ntp Drift File
>>> 3 Feb 10:36:45 ntpd[412]: frequency error -512 PPM exceeds >>> tolerance 500 PPM >>> 3 Feb 10:41:02 ntpd[412]: synchronized to GPS_BANC(0), stratum=0 >>> 3 Feb 11:47:44 ntpd[412]: no servers reachable >>> 3 Feb 11:48:49 ntpd[412]: synchronized http://serverfault.com/questions/378784/ntpd-frequency-error-1732-ppm-exceeds-tolerance-500-ppm to GPS_BANC(0), stratum=0 >>> 3 Feb 12:03:51 ntpd[412]: time reset -0.871702 s >>> 3 Feb 12:03:51 ntpd[412]: frequency error -512 PPM exceeds >>> tolerance 500 PPM >>> 3 Feb 12:08:09 ntpd[412]: synchronized to GPS_BANC(0), stratum=0 >>> >>> What can I do to control the PPM? This is a SPARC-based VME >>> board, getting its clock from a VME-based SYNCCLOCK32 GPS/IRIG card. >>> >>> TIA, >>> Kit >>> >>> On Feb 3, 2005, at 9:46 http://lists.ntp.org/pipermail/questions/2005-February/004099.html AM, Kit Plummer wrote: >>> >>>> Hey folks, >>>> >>>> I am having NTP prolbems. Obviously. But, I am not sure it is >>>> NTP, or my reference driver - or hardware for that matter. The >>>> problem appears to be related to an extremely high PPM. Am I >>>> understanding correctly that this number is derived from whatever >>>> is in the ntp.drift file? >>>> >>>> Well, the real problem appears to be a 1 second step - >>>> sporadically. Though I haven't really been able to prove that >>>> either...it is just heresay from a system user. >>>> >>>> Also, can someone explain this output from ntpd -d: >>>> >>>> peer GPS_BANC(0) event 'event_reach' (0x84) status 'unreach, conf, >>>> 1 event, event_reach' (0x8014) >>>> >>>> If there is some other information I can provide for >>>> troubleshooting purposes let me know. >>>> >>>> TIA, >>>> Kit >>>> --------------------------------------------------------------------- >>>> -- - >>>> Kit Plummer >>>> Operations Research and System Performance Dept. >>>> Raytheon Missile Systems >>>> >>>> _______________________________________________ >>>> questions mailing list >>>> questions at lists.ntp.isc.org >>>> https://lists.ntp.isc.org/mailman/listinfo/questions >>>> >>> >> Please don't "top post". >> >> Do you encounter this problem if you start ntpd with no drift file >> and with the clock set to within a few seconds of the correct >> time?
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1?Jan 20 00:43:32 [ntpd] time reset -0.158476 sJan 20 00:43:32 [ntpd] kernel time sync disabled 0001Jan 20 01:04:54 [ntpd] time reset +0.156179 sJan 31 17:32:58 [ntpd] time reset +0.280824 sJan 31 17:32:58 [ntpd] kernel time sync disabled 0001Jan 31 18:11:23 [ntpd] time reset -0.291079 sJan 31 19:24:02 [ntpd] time reset -0.168920 sJan 31 23:23:15 [ntpd] time reset -0.176246 sJan 31 23:44:41 [ntpd] time reset +0.551415 sFeb 1 00:23:07 [ntpd] time reset -1.160321 sFeb 1 00:23:07 [ntpd] frequency error -503 PPM exceeds tolerance 500 PPMFeb 1 01:01:30 [ntpd] time reset -0.328978 sFeb 1 01:39:59 [ntpd] time reset +0.284085 sFeb 1 02:56:48 [ntpd] time reset -0.144699 sFeb 1 03:35:13 [ntpd] frequency error -554 PPM exceeds tolerance 500 PPMFeb 1 04:09:21 [ntpd] time reset +0.486346 sFeb 1 04:09:21 [ntpd] frequency error 528 PPM exceeds tolerance 500 PPMFeb 1 04:30:46 [ntpd] time reset +1.114938 sFeb 1 05:09:13 [ntpd] time reset -1.170027 sFeb 1 05:09:13 [ntpd] frequency error -570 PPM exceeds tolerance 500 PPMFeb 1 07:55:54 [ntpd] time reset +0.217560 sFeb 1 08:17:16 [ntpd] time reset +0.625292 sFeb 1 08:55:43 [ntpd] time reset -1.170204 sFeb 1 08:55:43 [ntpd] frequency error -507 PPM exceeds tolerance 500 PPMFeb 1 09:34:10 [ntpd] frequency error -32659 PPM exceeds tolerance 500 PPMFeb 1 10:12:32 [ntpd] time reset +0.230971 sFeb 1 10:51:03 [ntpd] time reset +0.227721 sFeb 1 11:29:28 [ntpd] frequency error 532 PPM exceeds tolerance 500 PPMFeb 1 12:03:43 [ntpd] no servers reachableFeb 1 12:46:24 [ntpd] time reset -1.731346 sFeb 1 12:46:24 [ntpd] frequency error 512 PPM exceeds tolerance 500 PPMEven though I have set maxpoll to 16 in order to cause as few traffic aspossible to the pool.ntp.org servers I'm a bit surprised that ntpd had_that_ much problems to keep the clock stable late January 31.So, what might have caused this, and is it my fault or the threeupstream servers'?I don't see why ntpd completely lost control with a setting that workedflawlessly 24/7 for a year, on the other hand I can't believe that allof the three configured servers had different times the same day. Imean, one, ok, but all three?Thanks, HermannDid something happen to your environment? It looks as if your localclock is, or was, on the edge of the +/-500 PPM tolerance range. Atemperature change could have pushed a marginal clock over the edge.Another possibility would be network convulsions of some sort affecting