[ntp:questions] Re: synchronization

Ron Croonenberg ronc at depauw.edu
Thu Mar 9 17:50:01 UTC 2006


Richard B. Gilbert wrote:

> Ron Croonenberg wrote:
> 
>> Hello,
>>
>> I am trying to do the following.
>>
>> We are planning to have a time server with it's own gps/clock and have 
>> other servers sync with that one.
>>
>> For now I am setting up one machine that servers as the main time 
>> server and let others sync with it.
>>
>> Problem I have is that I see things in the ntp.log like :
>>  9 Mar 09:06:21 ntpd[2431]: time reset 1.734569 s
>>  9 Mar 09:06:21 ntpd[2431]: synchronisation lost
>>  9 Mar 09:15:01 ntpd[2431]: synchronisation lost
>>  9 Mar 09:30:03 ntpd[2431]: time reset 1.740734 s
>>  9 Mar 09:30:03 ntpd[2431]: synchronisation lost
>>  9 Mar 09:34:28 ntpd[2431]: synchronisation lost
>>
>> So I either have a problem in the  server and client config files or I 
>> am facing another problem ?
>>
>> tia,
>>
>> Ron
> 
> 
> Please post the ntp.conf files for both the server and the client.  Also 
> post the output of "ntpq -p" for both the server and the client.  Be 
> sure that both server and client have had ntpd running for at least 
> twenty minutes before doing the ntpq -p.
> 
> Also post the version of ntpd you are running on each machine.
> 
> Finally the O/S and version on each machine might be relevant.


thanks,  I appreciate it.

here's what I have.


Server ntp.conf:
********************************************************
restrict default nomodify notrust
restrict 127.0.0.1
restrict xxx.yyy.zzz.0 mask 255.255.255.0 nomodify notrap

noquery

server  129.6.15.29
server  204.34.198.40
server  18.145.0.30

driftfile /var/lib/ntp/drift
logfile   /var/log/ntp.log
broadcastdelay  0.008

authenticate no

keys            /etc/ntp/keys
********************************************************



server ntpq -p :
********************************************************
      remote           refid      st t when poll reach   delay   offset 
  jitter
==============================================================================
+time-b.nist.gov .ACTS.           1 u   43   64  377   36.473  3598.51 
33.187
*tick.usnogps.na .USNO.           1 u   50   64  377  107.202  3594.40 
31.645
+NAVOBS1.MIT.EDU .PSC.            1 u   43   64  377   36.762  3596.60 
32.328
********************************************************

server OS: Linux 2.4.21-4.ELsmp




client ntp.conf:
********************************************************
restrict default ignore
restrict xxx.yyy.zzz.8 mask 255.255.255.255 nomodify notrap noquery
restrict 127.0.0.1

noquery

server xxx.yyy.zzz.8

driftfile /var/lib/ntp/drift
broadcastdelay  0.008
logfile /var/log/ntp.log

authenticate no

keys            /etc/ntp/keys
********************************************************





client ntpq -p:
********************************************************
      remote           refid      st t when poll reach   delay   offset 
  jitter
==============================================================================
*neptune.sub.dom NAVOBS1.MIT.EDU  2 u   50   64  377    0.214  -315.16 
36.796
********************************************************

client OS : Linux 2.4.21-32.ELsmp




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