[ntp:questions] Stability problem on PowerEdge (SuSE 9.3)

Till Wimmer news-dfn at substring.ch
Sun Feb 25 20:09:00 UTC 2007


Hal Murray wrote:
>> Now i think it's probably an network issue.
>> A few hours after starting ntpd it always looks like this
>>     remote           refid      st t when poll reach   delay   offset
>> jitter
>> ==============================================================================
>> bigben.solnet.c 195.66.241.3     2 u  849 1024  377  2033.34  992.089
>> 0.816
>> elk.trapper.ch  10.0.0.2         2 u  928 1024  377  2186.13  964.833
>> 22.731
> ...
> 
> Are you on the end of a slow and busy link?
> 
> That's a 2 second delay.  The offset of 1 second makes me think
> that the system got started when the link was idle and now
> the round trip time is 2 seconds.  ntp will assume that the
> delay is symmetric.  You would see something like this if
> all (most) of the delay was in one direction.
> 
> Note the reach data of 377 shows that no packets are getting lost. 
> 
We're on a fixed IP DSL line which always should be up. Otherwise i
would not have been able to log into the server for the pinging...

The pinging results make me believe that this issue is provoked by some
latency policies of our provider.

Till




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