[ntp:questions] Re: What exactly does prefer do?
Richard B. Gilbert
rgilbert88 at comcast.net
Thu Apr 6 19:11:12 UTC 2006
Lee Sailer wrote:
> I have occasionally had a GPS NTS server goes slowly insane. That is,
> it starts to differ from the others (we have 6 world wide) by 1, 2,
> then 3 second, and eventually hundreds of seconds.
> What bothers me about "prefer" is that if the preferred one goes
> insane, how long will clients that prefer it follow it? How does
> "prefer" actually effect the choice and weighting function.
> Could people with actual internals/algorithm knowledge respond? Also,
> if it matters, this is NTP 3.5f (HP-UX 11.11).
NTP 3.5f is history so ancient that few now living even remember it.
Start by downloading a copy of the reference implementation
http://ntp.isc.org/bin/view/Main/SoftwareDownloads and building it for
your system(s). If the current implementation still exhibits this
behavior, file a bug report.
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