[ntp:questions] Stick to PPS, even if the prefer server fails

David Mills mills at udel.edu
Sun Mar 29 16:37:06 UTC 2009


The intersection algorithm has been documented in several places along 
with configuration controls to modify its behavior. Is the tyranny you 
cite due to that algorithm or the notion of the prefer peer in the first 
place? If the latter, do you have an alternate suggestion?


John Ackermann N8UR wrote:

> David Mills said the following on 03/28/2009 11:12 PM:
>> John,
>> The intended design to detect and suppress bad reference/PPS clocks 
>> is at least two additional sources, that do not have to be reference 
>> clocks. If the reference/PPS clock sails to the sunset, the selection 
>> algorithm will vote it off and the PPS will follow. The server will 
>> continue at whatever surving source stratum plus one. This might not 
>> be considered pefect, but it would avoid real disaster.
> Dave, I fully agree with you that the PPS signal should be subject to 
> the selection algorithm.  It's the tyranny of the prefer peer that I 
> object to.
> John

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