[ntp:questions] frequency adjusting only

Steve Kostecke kostecke at ntp.org
Tue Apr 22 15:34:34 UTC 2008


On 2008-04-22, maxime louvel <m.louvel at gmail.com> wrote:

> On Tue, Apr 22, 2008 at 2:42 PM, Steve Kostecke <kostecke at ntp.org> wrote:
>>
>> >I don't care if the synchronisation to the public NTP is accurate
>> >around half a second.
>>
>> You're displaying a common misconception about NTP.

[snip]

> Sorry I haven't express myself correctly. What I meant is that I want an
> accuracy of 50 usec within my subnet and I want my whole subnet to be
> synchronised to UTC with an accuracy of 1 second or less if possible.

In my experience ...

On a LAN ntpd shows an inter-node offset of between 2ms to 500us

On The Internet ntpd shows an inter-node offset of between 10ms and 1ms

YMMV

-- 
Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/




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