[ntp:questions] ntpd: more than 60 s behind

asklucas asklucas at gmx.net
Wed Apr 20 06:55:03 UTC 2011


Hello all!

I installed Meinberg's build of ntpd for Windows:
ntpd 4.2.4p8 at lennon-o Dec 09 10:46:55 (UTC+01:00) 2009  (3)

While it initially synchronized successfully, it didn't work for two days. Now I'm more than 60 seconds behind.

Connection to the closest remote NTP server works fine, see output of ntpdate below.

What's wrong? I have no clue to begin troubleshooting...

Thank you for your help!

L.

==============================================================================

D:\util\system\NTP\bin>ntpdate -q 217.19.37.26
server 217.19.37.26, stratum 1, offset 63.223438, delay 0.04553
20 Apr 08:42:32 ntpdate[4168]: step time server 217.19.37.26 offset 63.223438 sec

D:\util\system\NTP\bin>ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*LOCAL(0)        .LOCL.          12 l   18   64  377    0.000    0.000   0.001
 217.19.37.26    .ATOM.           1 u  781 1024  377   21.873  56147.1 3375.72
 ptbtime1.ptb.de .PTB.            1 u  747 1024  377   43.859  52929.2 3343.98
 217.19.37.27    .ATOM.           1 u  764 1024  377   21.023  52838.6 3394.36
 ptbtime2.ptb.de .PTB.            1 u  768 1024  377   43.901  56232.9 3394.40
 nav.metrologie. .ATOM.           1 u  749 1024  377   20.462  52937.8 3346.61
 ptbtime3.ptb.de .PTB.            1 u  785 1024  377   43.870  56161.2 3384.54
 ntp.nsm.pl      150.254.183.15   2 u  759 1024  377   47.775  52883.6 3359.28

D:\util\system\NTP\bin>ntpq -p 217.19.37.26
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
-ptbtime1.ptb.de .PTB.            1 u    -   16  377   36.345   -0.177   2.356
-ptbtime2.ptb.de .PTB.            1 u    -   16  377   35.854    0.051   6.637
+nav.metrologie. .ATOM.           1 u    -   16  377    0.113   -0.014   0.003
+217.19.37.27    .ATOM.           1 u    -   16  377    0.114   -0.006   0.004
oPPS(0)          .ATOM.           0 l    -   16  377    0.000   -0.007   0.003
 PPS(1)          .ATOM.           0 l 147d   16    0    0.000   -0.005   0.001

ntp.conf
==============================================================================
# NTP Network Time Protocol 
# **** ATTENTION ****: *You have to restart the NTP service when you change this file to activate the changes* 
# PLEASE CHECK THIS FILE CAREFULLY AND MODIFY IT IF REQUIRED 
# Configuration File created by Windows Binary Distribution Installer Rev.: 1.26  mbg
# please check http://www.ntp.org for additional documentation and background information
# Use drift file 
driftfile "D:\util\system\NTP\etc\ntp.drift"

# your local system clock, should be used as a backup
# (this is only useful if you need to distribute time no matter how good or bad it is)
server 127.127.1.0
# but it operates at a high stratum level to let the clients know and force them to
# use any other timesource they may have.
fudge 127.127.1.0 stratum 12 

# Use specific NTP servers
server bevtime1.metrologie.at iburst minpoll 8 maxpoll 10
server ptbtime1.ptb.de iburst minpoll 8 maxpoll 10
server bevtime2.metrologie.at iburst minpoll 8 maxpoll 10
server ptbtime2.ptb.de iburst minpoll 8 maxpoll 10
server time.metrologie.at iburst minpoll 8 maxpoll 10
server ptbtime3.ptb.de iburst minpoll 8 maxpoll 10
server 0.europe.pool.ntp.org iburst minpoll 8 maxpoll 10
#server time-a.timefreq.bldrdoc.gov iburst minpoll 8 maxpoll 10
#server time-c.timefreq.bldrdoc.gov iburst minpoll 8 maxpoll 10

# End of generated ntp.conf --- Please edit this to suite your needs

###########################################################
#Section insert by NTP Time Server Monitor 18.04.2011

enable stats
statsdir "D:\util\system\NTP\etc\"
statistics loopstats
###########################################################

==============================================================================




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