[ntp:questions] 2xGPS and 4x peers setup - disturbed by 5th and 6th peer
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Tue Nov 4 20:16:28 UTC 2014
Martin Burnicki wrote:
> BlackLists wrote:
>> Martin Burnicki wrote:
>>> asymmetry in the packet delay, so from the Linux client's
>>> point of view all 4 LANTIMEs in the remote locations seemed
>>> to have a time offset in the same range, a few milliseconds,
>>> compared to the 2 local LANTIME.
...
>>> that the weight put on different criteria
>>> in the selection algorithm has changed over versions,
>>> and the newer versions of ntpd act more like you'd expect.
>>
>> TOS MinDist affects this.
>>
>> e.g. in the case of serial nema and pps, sometimes the mindist
>> needs to be increased from 1ms to perhaps 20ms,
>> and I've seen as much as 400ms (fairly often);
>> {which makes me wonder if the PPS is inverted?}
>
> I know, but you have misunderstood.
I understood fine.
My point was, increasing the mindist could create a different outcome,
that includes the two that would have otherwise been marked false tickers;
they may not have been chosen as sys peer,
but would likely make it into the cluster.
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