[ntp:questions] Double "prefer" configuration

Eugen COCA ecoca at eed.usv.ro
Mon Feb 26 19:02:02 UTC 2007


I've installed a fresh new PRS-10 frequency standard for my NTP
servers. I want to set up a configuration where the server will
function only on the PRS-10 PPS output in the absence of the GPS
signal. For sure, this will be a failure condition. I tried something
like this:

server 127.127.20.1 minpoll 6 maxpoll 6 prefer
fudge 127.127.20.1 flag3 0 time1 0.000 refid GPS

server 127.127.22.1 minpoll 4 maxpoll 4 prefer
fudge 127.127.22.1 flag3 1 time1 0.000 refid PPS

The PPS signal is slaved from the GPS PPS signal. When the GPS data is
absent (power supply cut-off - for tests) the server will synchronize
on the PPS signal only (which is in phase with the GPS PPSs):

     remote           refid      st t when poll reach   delay
offset  jitter
==============================================================================
 127.127.20.1    .GPS.            0 l 135m   64    0    0.000
0.000   0.004
 192.53.103.103  .PTB.            1 u   33  256  377   54.777
0.314   3.395
 130.149.17.8    .PPS.            1 u    9  256  377   54.986
0.850   0.100
 145.238.110.49  .1PPS.           1 u    4  256  377   54.876
0.753   6.071
 18.7.7.75       .GPS.            1 u   31  256  377  204.818
-33.562   5.309
o127.127.22.1    .PPS.            0 l   11   16  377    0.000
-0.001   0.004
 80.96.120.252   .PPS.            1 u   63   64  377    0.194
0.003   0.004
 80.96.120.249   .PPS.            1 u   37   64  377    0.245
-0.006   0.021
 192.53.103.104  .PTB.            1 u   33  256  377   55.326
0.950   4.306
 18.7.21.64      .GPS.            1 u   25  256  377  194.803
-27.663  10.021


Is there something wrong ?

Is there possible ot have two PPS signals in one server configuration ?




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