[ntp:questions] Peering amongst S1
Doug Calvert
dfc-list at douglasfcalvert.net
Tue Oct 25 04:00:07 UTC 2011
The docs say no iburst on peers and to use max/min poll of 4. Try
changing to the suggested settings and see if it works better.
On 10/24/2011 09:31 PM, Miguel Gonçalves wrote:
> Hi!
>
> I am running the following configuration
>
>
> 172.16.0.1 ntp.conf:
>
> server 127.127.20.0 mode 2 prefer minpoll 3 maxpoll 3
> fudge 127.127.20.0 flag1 1 flag2 0 flag3 1 flag4 1
>
> tos mindist 0.250
>
> peer 172.16.0.2 minpoll 3 maxpoll 3 iburst
>
> server ntp-p1.obspm.fr iburst
> server ptbtime1.ptb.de iburst
> server ntp1.oma.be iburst
>
> restrict 127.0.0.1
> restrict default nomodify notrap nopeer
>
> restrict 172.16.0.2 nomodify notrap
>
>
> 172.16.0.2 ntp.conf:
>
> server 127.127.30.0 prefer minpoll 3 maxpoll 3
>
> tos mindist 0.1
>
> peer 172.16.0.1 minpoll 3 maxpoll 3 iburst
>
> server ntp-p1.obspm.fr iburst
> server ptbtime1.ptb.de iburst
> server ntp1.oma.be iburst
>
> restrict 127.0.0.1
> restrict default kod nomodify notrap nopeer
>
> restrict 172.16.0.1 nomodify notrap
>
> Why I am getting 172.16.0.2 as an outlier on 172.16.0.1?
>
> tick# ntpq -p
> remote refid st t when poll reach delay offset jitter
> ==============================================================================
> oGPS_NMEA(0) .GPS. 0 l 3 16 377 0.000 -0.001 0.004
> -172.16.0.2 .GPS. 1 u 5 16 377 0.131 0.002 0.004
> +ntp-p1.obspm.fr .TS-3. 1 u 24 64 377 55.080 2.345 0.881
> -ptbtime1.ptb.de .PTB. 1 u 30 64 377 69.974 -1.179 1.427
> -ntp1.oma.be .PPS. 1 u 24 64 377 59.191 2.750 1.606
>
> But 172.16.0.1 is OK when used by 172.16.0.2?
>
> tock# /usr/local/sbin/ntpq -p
> remote refid st t when poll reach delay offset jitter
> ==============================================================================
> *GPS_ONCORE(0) .GPS. 0 l 8 8 376 0.000 -0.003 0.004
> +172.16.0.1 .GPS. 1 s 8 8 376 0.132 0.001 0.004
> +ntp-p1.obspm.fr .TS-3. 1 u 45 64 377 52.783 1.075 2.611
> -ptbtime1.ptb.de .PTB. 1 u 54 64 377 69.946 -1.241 0.564
> -ntp1.oma.be .PPS. 1 u 42 64 377 60.493 3.669 2.034
>
> Both are on the same LAN and running NTP 4.2.7p225.
>
> Any help?
>
> Thanks!
>
> Cheers,
> Miguel
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