[ntp:questions] ntp drops gps/pps - lets time drift

David Lord snews at lordynet.org
Thu Jun 9 22:37:22 UTC 2011


Rob wrote:
> David Lord <snews at lordynet.org> wrote:
>>> server 127.127.28.0  minpoll 4
>>> fudge 127.127.28.0  time1 0.290 refid GPS stratum 3  #garmin
>>> server 127.127.28.1  minpoll 4 prefer
>>> fudge 127.127.28.1  refid PPS
>> Try with prefer for the refclock rather than the PPS
>>
>> server 127.127.28.0  minpoll 4 prefer
> 
> Not a good idea.  127.127.28.1 is the preferable source.

So far as I know the prefer peer needs to give the time rather than
just a second marker.

>> and don't use 127.127.0.1

> Did you actually read the posting?

Yes I did

! When I have an outside source, like 0.us.pool.ntp.org or 
tick.usask.ca, ntp uses
! the PPS signal perfectly. When I drop the outside source or substitute 
with
! 127.127.0.1,
! NTP x's out my PPS and then GPS (when reach is 177) even though it is 
a good
! signal.

David




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