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NTP Issues Today

Just got paged with a pbx alarm that had 1970 as the year. By the time I logged in , it was showing 2012.  Using GPS for time and date. 

-----Original Message-----
From: Mark Andrews [mailto:marka at isc.org] 
Sent: Monday, November 19, 2012 8:42 PM
To: Van Wolfe
Cc: nanog at nanog.org
Subject: Re: NTP Issues Today

In message <CAMeggd4cDQwhxQE_JbvpNR-PKKe9LXqA+KzJ97anHFonjwZhdQ at mail.gmail.com>
, Van Wolfe writes:
> Hello,
> Did anyone else experience issues with NTP today?  We had our server 
> times update to the year 2000 at around 3:30 MT, then revert back to 2012.
> Thanks,
> Van

NTP should be immune from this sort of behaviour unless you did a ntpdate at the wrong moment.  The clocks should have been marked as insane.

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org