[189237] in North American Network Operators' Group
Re: NIST NTP servers
daemon@ATHENA.MIT.EDU (Jon Meek)
Wed May 11 21:43:03 2016
X-Original-To: nanog@nanog.org
In-Reply-To: <CAJm4238cZ+U_3ZtkKbSfUw9OsghyzcFgO3wzLFB5G3DiavrR2g@mail.gmail.com>
Date: Wed, 11 May 2016 11:40:03 -0400
From: Jon Meek <meekjt@gmail.com>
To: "nanog@nanog.org list" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
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
