[ntp:questions] Active Peer vs. PPS

Fabian Abplanalp fabian.abplanalp at bug.ch
Thu Mar 7 14:31:53 UTC 2013


Hi

I have a question regarding a Linux with PPS Kernel [*1] (actually a 
raspberry pi with an adafruit GPS [*2]).

 From ntp.conf:
server 127.127.20.0 prefer mode 17
fudge   127.127.20.0 flag1 1 flag3 0 time2 0.496

server ntp1.home4u.ch iburst
server ntp2.home4u.ch iburst

Now I get from ntpq -p:
root at raspberrypi:~# ntpq -p
      remote           refid      st t when poll reach   delay offset  
jitter
==============================================================================
oGPS_NMEA(0)     .GPS.            0 l   53   64  377    0.000 0.015   0.003
*ntp1.home4u.ch  .PPS.            1 u   57   64  377   11.118 2.247   1.317
+ntp2.home4u.ch  .DCFa.           1 u   58   64  377   11.315 2.654   0.333
+ntp3.home4u.ch  .DCFa.           1 u   21   64  377   17.514 -1.807   2.797

If I let a Client sync to the raspi it says that it's a stratum 1 server 
(which means the server is syncing to GPS/PPS), but why is the "active 
peer" always an external server (no matter which server I use)? Is this 
correct?

Thanks,
Fabian

[*1]    Linux raspberrypi 3.1.9adafruit-pps+ #21 PREEMPT Sun Sep 2 
10:57:58 PDT 2012 armv6l GNU/Linux
[*2]    http://www.adafruit.com/products/746


More information about the questions mailing list