[time-nuts] leontp offset?
gmx.tallahassee at gmail.com
Fri Oct 14 20:31:57 EDT 2016
I'm checking out the leontp ntp time server (leontp.com). After a week of
use I am getting the following ntp -q output:
$ ntpq -pn
remote refid st t when poll reach delay offset
*172.17.21.11 .GPS. 1 u 13 16 377 0.137 0.077
0.054 <- Arbiter 1084C GPS Clock
+172.17.21.12 .GPS. 1 u 11 16 377 0.101 0.085
0.174 <- Arbiter 1084C GPS Clock
x172.17.21.233 .GPS. 1 u 11 16 377 0.071 9.760
0.061 <- LeoNTP
the offset of the leontp device from the other clocks has consistently been
in the 9.5 -10.5 range. since I'm measuring all three sources from the
same (EL7) computer, I would expect that the offset of the leontp unit to
converge to be in the close neighborhood of the offsets of the arbiters.
It has not converged, instead maintaining the ~10ms offset.
172.17.21.11 is approx 400M away through two Cisco 3750G switches no
172.17.21.12 is in the same rack as the leoNTP unit and plugged into the
same 3750G switch
Antenna location for the .12 arbiter and the leontp is on the same rung of
the same tower. Tower has clear horizon to horizon view. cable runs are
the same (obviously).
I did run with the included puck in my south facing office window (rather
than the GPS antenna on the tower) for a couple of days when I first got
the unit. The offset behaviour was the same.
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