[169019] in North American Network Operators' Group
Re: Need trusted NTP Sources
daemon@ATHENA.MIT.EDU (Lyle Giese)
Sun Feb 9 16:19:39 2014
Date: Sun, 09 Feb 2014 15:19:09 -0600
From: Lyle Giese <lyle@lcrcomputer.net>
To: nanog@nanog.org
In-Reply-To: <20140209205611.GA18047@pob.ytti.fi>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Look back in the archives and see the problems that erupted when one of
the big guys rebooted and came on line with bad time(tock.usno.navy.mil
in Nov of 2012). It was talked about in Outages and other lists at the
time it happened.
On 02/09/14 14:56, Saku Ytti wrote:
> On (2014-02-09 15:45 -0500), Jay Ashworth wrote:
>
>> If I'm locked to 2 coherent upstreams and one goes insane, I'm going to
>> know which one it is, because the other one will still match what I already
>> have running, no?
>>
>> Or do I understand NTP less well than I think?
> I don't think you can reasonably tell which of the two is the false ticker.
> Andriy says your PC would blindly follow one who is in more agreement with
> your local lock, and PC's have terrible oscillators (I don't know why, 5EUR
> would buy LOT better oscillator).
>
