nanog mailing list archives

Re: Need trusted NTP Sources


From: Jimmy Hess <mysidia () gmail com>
Date: Fri, 7 Feb 2014 06:38:06 -0600

On Fri, Feb 7, 2014 at 5:35 AM, Saku Ytti <saku () ytti fi> wrote:

On (2014-02-06 21:14 -0500), Jay Ashworth wrote:

My usual practice is to set up two in house servers, each of which
talks to:
Two is worst possible amount of NTP servers to have. Either one fails and
your timing is wrong, because you cannot vote false ticker. And chance of
either of
two failing is higher than one specific of them.


+1 to having at least 3 NTP servers.
Because complete outage is only one kind of failure.

Don't forget   poor performance due to high latency, or
Server X  emitting  corrupted or  inaccurate data


--
-JH


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