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

David Mills mills at udel.edu
Sat Mar 21 19:11:08 UTC 2009


David,

You describe the intended behavior. The PPS should still be enabled, 
even if the prefer source comes dark. Check with the ntptime program. 
and confirm that the PPSTIME bit is lit.

Dave

David J Taylor wrote:

>alkopedia at googlemail.com wrote:
>  
>
>>Hi
>>My setup is as follows:
>>
>>Server A <--- GPS
>> |
>> |
>>Server B <--- HP cesium frequency normal
>>
>>
>>Server A gets it's timestamps from GPS.
>>Server B gets it's timestamps from Server A and PPS from the HP
>>cesium. Server A is marked as prefer because otherwise PPS won't work.
>>
>>My problem is:
>>If Server A loses the GPS signal, it falls back to LOCAL and begins to
>>drift away. In the beginning Server B doesn't care about that and
>>stays to the PPS. But later it disconnects PPS and runs on Server A
>>again. So both servers drift away. In my opinion Server B should stay
>>to the PPS signal. Is there anything I can do about that?
>>    
>>
>
>What other sources do you have configured for server B?
>
>David
>
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