[ntp:questions] Re: ntp client over satellite and no CMOS battery

Danny Mayer mayer at gis.net
Mon Sep 12 20:55:17 UTC 2005


GNWIII at gmail.com wrote:
> Brad Knowles wrote:
> 
> 
>>	Note that ntpd can continue to run indefinitely, even though it
>>has not yet been able to get a sync.  It will continue to try to get
>>a sync and then keep you in sync, until you reboot the machine.
> 
> 
> Or the network goes down!
> 
> I have a similar situation to that of the original post.  The problem
> with letting ntpd run is that you have to manually check between the
> time that the network comes up when ntp is sync'd.  In my if-up.local I
> have a "service ntpd restart", which (on fedora core 4) does ntpdate to
> get the initial setting, then starts ntpd.  This way, the network
> doesn't "come up" until ntpd has a good chance to sync.  I just leave
> ntpd running after the network goes down.
> 
> More work needs to be done for sites with intermittent network access.
> What is the cheapest way to keep ntpd sync'd to 10 s, 1 s, or 0.1 s
> without network?
> 
We're working on a version that handles these things dynamically so that 
it will see them when they come up.

Danny



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