[ntp:hackers] Modern FreeBSD NTP Stratum 1 server?
François Meyer
fmeyer at obs-besancon.fr
Wed Dec 16 14:49:19 UTC 2015
Hi Terje,
I have 2 of them running freebsd :
FreeBSD 10.1-RELEASE (PPS) #0: Thu Jan 29 09:23:25 UTC 2015
remote refid st t when poll reach delay offset jitter
==============================================================================
oPPS(0) .PPS. 0 l 52 64 377 0.000 0.000 0.002
Cs5071A(0) .5071. 0 l 20d 64 0 0.000 14.308 0.000
*saturne.obs-bes .PPS. 1 s 46 64 377 0.282 0.083 0.040
ntp-p1.obspm.fr .XFAC. 16 s - 1024 0 0.000 0.000 0.000
That one also implements a tailored Cs5071A driver reading TOD and
leap info directly out of the 5071A serial line ; as you can see
it is currently (physically) disconnected from the Cs but was doing
well with an offset averaging around 0 and a jitter around 20 ms if
I remember well (polls to the Cs serial line are buffered and sync-ed
with the PPS before being sent to ensure consistency).
The other one :
FreeBSD 10.1-C3 (PPS) #0: Thu Jan 8 13:25:54 UTC 2015
remote refid st t when poll reach delay offset jitter
==============================================================================
oPPS(0) .PPS. 0 l 23 64 377 0.000 0.017 0.002
*ntp-p1.obspm.fr .MRS. 1 s 23 64 377 11.243 -0.043 0.255
I run freebsd only on those machines so I am far from a
freebsd specialist but I may be able to answer/check
some of the questions you might have.
Oe Wed, 16 Dece2015, Terje Mathsen wrote:
> I have been trying, unsuccessfully, for a couple of days now to replace my
> old S1 server (ntp1.tmsw.no) which was entered in the pool with an IPv6
> address only:
>
> The new server was based on PC-BSD 10.1, then I downloaded all the ports and
> all the kernel source code in order to build a custom kernel.
>
> (I first tried to simply use kldload to load the PPS modulu which seemed to
> work but when configuring ntpd (latest ntp-dev code) it didn't seem like pps
> was located so the ntpd binary was built without PPS support.)
>
> Anyway, after the custom kernel was installed I did get one YES for pps
> during configure, but that didn't seem to be enough, because when I load
> ntpd I get messages in /var/log/messages stating that the ppsapi is
> unusable. :-(
>
> So my question to the list is: Does anyone have recent experience in making
> ntpd + pps work on FreeBSD?
>
> Terje
> PS. The reason I'm doing this is because the old server crashed, so I can't
> simply copy all the conf files from that one. :-(
>
> --
> - <Terje at tmsw.no>
> "almost all programming can be viewed as an exercise in caching"
>
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> hackers at lists.ntp.org
> http://lists.ntp.org/listinfo/hackers
>
--
François Meyer Tel : (+33) 3 81 66 69 27 Mob : 6 27 28 56 83
Observatoire de Besancon - BP1615 - 25010 Besancon cedex - FRANCE
Institut UTINAM * Universite de Franche-Comte * CNRS UMR 6213 ***
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