[ntp:questions] what happens if ntp server jumps time BIG TIME

Dave Hart hart at ntp.org
Sat Feb 11 06:06:19 UTC 2012

On Sat, Feb 11, 2012 at 01:03, unruh <unruh at invalid.ca> wrote:
> On 2012-02-09, bombjack <bombjack99 at gmail.com> wrote:
>> What happens if I change the time on the server, lets say 5 years
>> forward? Will the client sync to the server? and If so, how? big leap?
>> small steps? Will the flag "-g" affect how the client reacts to this
>> changes?
> No. If ntp finds the time out by >128ms, it steps the clock. If it finds
> it out by 1000(?) sec it says "Something is horribly wrong here" and
> abandons ship. (ntpd exits).

Don't let facts get in the way of your recollections, I suppose.
Quoting myself from this very thread: "-g allows a single step
exceeding the panic threshold, not necessarily at startup."  The panic
threshold defaults to 1000 s.  But don't take my word for it -- see
the docs.

Dave Hart

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