On Thu, Apr 24, 2014 at 11:07 AM, Montgomery, Peter BIS <
peter.montgom...@fs.utc.com> wrote:
> I would like to know whether NTP can sync between a client and a server
> within 1ms if the client and server are Linux applications on a simple
> local network ( less than 10 nodes).
As previously mentioned it depends. (These machines are all on the same
network but the last one is wireless)
remote refid st t when poll reach delay offset
jitter
==============================================================================
-nub .GPPS. 1 u 203 1024 377 0.676 -0.084
0.114
+black .GPPS. 1 u 432 1024 377 0.345 -0.051
0.066
+aster .GPPS. 1 u 914 1024 377 0.354 -0.093
0.083
*ntp1 .GPS. 1 u 299 1024 377 1.248 -0.055
0.120
remote refid st t when poll reach delay offset
jitter
==============================================================================
+aster .GPPS. 1 u 140 256 377 0.383 -2.281
0.679
+ntp1 .GPS. 1 u 40 256 377 1.201 -2.306
0.703
*nub .GPPS. 1 u 211 256 377 0.628 -2.457
0.706
+black .GPPS. 1 u 32 256 377 0.184 -2.484
0.645
remote refid st t when poll reach delay offset
jitter
==============================================================================
+black .GPPS. 1 u 897 1024 377 1.024 33.284
46.324
-nub .GPPS. 1 u 45 1024 377 18.423 18.726
203.720
*aster .GPPS. 1 u 86 1024 377 43.362 10.866
26.145
+ntp1 .GPS. 1 u 267 1024 377 25.155 21.369
75.804
For reference the view from one server:
remote refid st t when poll reach delay offset
jitter
==============================================================================
oPPS(0) .GPPS. 0 l 4 8 377 0.000 0.001
0.002
*GPS_NMEA(0) .FURY. 0 l 3 8 377 0.000 -0.041
0.029
time-d.nist.gov .ACTS. 1 u 96 128 375 36.120 3.038
1.156
+nub .GPPS. 1 s 6 8 376 0.171 0.005
0.007
+black .GPPS. 1 s 3 8 377 0.032 0.016
0.009
+rPi1 .GPPS. 1 s 1 8 377 0.083 0.073
0.059
+ntp1 .GPS. 1 u 3 32 377 1.063 -0.115
0.003
+bbb2 .GPPS. 1 u 6 8 377 0.258 -0.066
0.008
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