[ntp:questions] Leap Second

Richard B. Gilbert rgilbert88 at comcast.net
Tue Dec 2 21:01:30 UTC 2008


morsupil wrote:
> On 2 déc, 20:22, Unruh <unruh-s... at physics.ubc.ca> wrote:
>> michael.from... at gmail.com writes:
>>> Hi all,
>>> Since yesterday I saw the leap second Flag set on some servers of
>>> ntp.pool.org. I'am quite surprise because the leap second add to be
>>> set the 31/12/2008 and not the 1/12/2008.
>>> Is it normal????
>> The leap is announced at the beginning of the month to make sure that all
>> ntp clients know about it. It always occurs at the end of the month ( I
>> think ntpd has it hard coded as the end of June or Dec, but in principle it
>> could be any month)
>>
>>> Michael
> 
> Mmmm
> I'm not sure...
> Here is an extract of the RFC1035 about NTP V3
> 
> Leap Indicator (LI): This is a two-bit code warning of an impending
> leap
> second to be inserted/deleted in the last minute of the current day,
> with bit 0 and bit 1, respectively, coded as follows:
> 
> 
> Regards
> 
> Michael

NTP V3.x has been obsolete for years!  Current version is 4.something.

At last report, a committee was writing a new RFC for NTP V4.  AFAIK, 
they have been working on it for a couple of years now.  I'm not going 
to hold my breath.




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