[168951] in North American Network Operators' Group
Re: Need trusted NTP Sources
daemon@ATHENA.MIT.EDU (Jimmy Hess)
Fri Feb 7 07:38:41 2014
In-Reply-To: <20140207113525.GA13919@pob.ytti.fi>
From: Jimmy Hess <mysidia@gmail.com>
Date: Fri, 7 Feb 2014 06:38:06 -0600
To: Saku Ytti <saku@ytti.fi>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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
