[189255] in North American Network Operators' Group
RE: NIST NTP servers
daemon@ATHENA.MIT.EDU (John Souvestre)
Thu May 12 22:04:56 2016
X-Original-To: nanog@nanog.org
From: John Souvestre <john@souvestre.com>
X-Google-Original-From: "John Souvestre" <John@Souvestre.com>
To: <nanog@nanog.org>
In-Reply-To: <CAKBbMYYmmcxZXZ=nCqy0Qrxn0QgOFOnqcRNPEa4kfwsFGZ7BEg@mail.gmail.com>
Date: Thu, 12 May 2016 13:39:11 -0500
Errors-To: nanog-bounces@nanog.org
> ... a dedicated WWVB receiver.
The Enhanced WWVB signal has better range and more accuracy, but I don't =
know if any receivers are available yet.
John
John Souvestre - New Orleans LA
-----Original Message-----
From: NANOG [mailto:nanog-bounces@nanog.org] On Behalf Of Jon Meek
Sent: 2016 May 11, Wed 10:40
To: nanog@nanog.org list
Subject: Re: NIST NTP servers
A note on using a Raspberry Pi as a NTP server. In my limited home lab
testing the RPi server had enough instability that Internet time sources
were always preferred by my workstation after ntpd had been running for =
a
while. Presumably this was due to the RPi's clock frequency drifting. At
some point I will look at it again.
If you do want to build your own Stratum 1 server you might want to =
glance
at:
https://github.com/meekj/ntp/blob/master/jon_meek_ntp_poster2009a.pdf
and the references there.
I had hoped to use the very low cost RPi Stratum 1 servers at $DAY_JOB, =
but
the test device was clearly not up to the job. At some point I hope to
revisit this and do some more testing like I did for that poster. I'll =
add
in a CDMA server and a dedicated WWVB receiver.
Jon
