[ntp:questions] Re: Local NTP for 5 Subnets

Richard B. Gilbert rgilbert88 at comcast.net
Thu Feb 23 13:00:47 UTC 2006


mrkofee at googlemail.com wrote:
> Ok, now the reach is 377 but it still does'nt work :-(
>      remote           refid      st t when poll reach   delay   offset
> jitter
> ==============================================================================
> *salukes.opensou 80.127.4.179     2 u   15   64  377   59.996  -22.493
>  9.712
> +dsl-33.152.240. 128.250.36.2     2 u   10   64  377  404.650  -10.787
>  9.624

I'd say that the above server is an extremely poor choice!  A round trip 
delay of 404 milliseconds means that the potential error in transmitting 
time from wherever he is to you, will be 202 milliseconds.   I try to 
use servers with round trip delays of 20 milliseconds or less.

> +frog.de.20six.n 200.9.74.4       3 u   11   64  377   43.175  -28.222
> 15.299
>  LOCAL(0)        LOCAL(0)         5 l   11   64  377    0.000    0.000
>  0.001
> 


I also noticed that none of your server statements in ntp.conf contains 
the "iburst" keyword.  Iburst causes the first eight request packets 
sent to each server to be sent at two second intervals.  This gets ntpd 
enough information to start synchronizing your clock in twenty seconds 
as opposed to a little over five minutes.  After the initial burst of 
eight packets, ntpd will send queries at the normal minimum poll 
      interval of 64 seconds.




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