REMINDER: LEAP SECOND

Fri Jun 19 18:29:34 UTC 2015

The universal workaround is to simply disable NTP on your devices sometime on Leap-Second eave. This will let the clocks free-run over the one-second push, an event of which they will be blissfully ignorant. When you re-enable NTP after The Leap, normal, non-destructive, NTP convergence will occur.

Better, if you have a master NTP site clock, you need only disable it’s upstream NTP feed to isolate all the subsidiary devices. If you don’t have such a master clock, this is an excellent time to set one up one. I have found the Time Machines TM1000A GPS time server very inexpensive and super reliable:

http://www.newegg.com/Product/Product.aspx?Item=0N6-001Y-00007 

 -mel

> On Jun 19, 2015, at 11:08 AM, Måns Nilsson <mansaxel at besserwisser.org> wrote:
> 
> Subject: REMINDER: LEAP SECOND Date: Fri, Jun 19, 2015 at 01:06:22PM -0400 Quoting Jay Ashworth (jra at baylink.com):
>> The IERS will be adding a second to time again on my birthday; 
> 
> This time around there are a number of Vendor C devices that will fail
> in spectacular ways if not upgraded with a pretty new release -- Nexus
> and ASR1K being the two most "interesting" among those I've reviewed. 
> 
> http://www.cisco.com/web/about/doing_business/leap-second.html#~ProductInformation
> 
> -- 
> Måns Nilsson     primary/secondary/besserwisser/machina
> MN-1334-RIPE                             +46 705 989668
> I'd like some JUNK FOOD ... and then I want to be ALONE --