[ntp:questions] ntp clients out of sync with server
unruh-spam at physics.ubc.ca
Tue Oct 28 19:21:50 UTC 2008
"naihong at gmail.com" <naihong at gmail.com> writes:
>I have a test environment,
> Server(WinXP2,Meinberg ntp-4.2.4p5)
> | | |
>Since it's time island, no connection to public time server. I select
>the orphan mode. After the server and clients start up. At first, the
>clents can sync to server's clock. But after 1 day, all 3 clients
>begin to sync to its local clock, not the server. The output of ntpq -
> remote refid st t when poll reach delay offset jitter
> 10.200.98.51 127.0.0.1 5 u 105 256 377
>0.299 -1.886 0.591
> *LOCAL(0) .LOCL. 12 l 23 64 377 0.000
>The ntp.conf on server is,
>driftfile "C:\Program Files\NTP\etc\ntp.drift"
>tos orphan 5
>The ntp.conf on all 3 clients is(except the drift file location),
>driftfile "C:\Program Files (x86)\NTP\etc\ntp.drift"
>server 10.200.98.51 iburst
>fudge 127.127.1.0 stratum 12
>logconfig = all
>logfile "C:\Program Files (x86)\NTP\etc\ntp.log"
>statsdir "C:\Program Files (x86)\NTP\etc\log\"
>statistics loopstats peerstats clockstats
>filegen loopstats file loopstats type day enable
>filegen peerstats file peerstats type day enable
>filegen clockstats file clockstats type day enable
>At beginning, the configuration file on client has only first 2 lines,
>the lines from server 127.127.1.0 were added for debugging purpose.
Debugging purposes? What debugging purposes?
>The same thing happened two years ago, on different computer hardware.
>At that time,I select undiscipline clock on server, and want 5 clients
>sync to server. But after days running, the clients out of sync with
>server, chasing their own clock. So I have to disable ntpd, and add
>ntpdate to crond to sync the time by force.
And you never thought of disabling the local clock? Why?
>Could any one give me some clues on this issue. Thanks
You stick the local clock in why? "doctor it hurts when I beat my head
against the wall" .
Look at the peerstats log-- are they getting any measurements from the
What is the output of ntpq -p?
More information about the questions