[time-nuts] documentation for beginners (was: Followup (still want a GPS-type NTP refclock))

[Azelio Boriani]

Yes, the problem is that I don't have anything running NTP... I'm searching
for a packet dump: I should use it to quickly develop the response for a
possible Lantronix XPort implementation.

On Mon, Oct 22, 2012 at 6:22 PM, Hal Murray <hmurray at megapathdsl.net> wrote:

>
> azelio.boriani at screen.it said:
> > And don't forget those NTP people. BTW, is there an NTP packet exchange
> > example? That is, what is the typical "conversation" between an NTP
> server
> > and a client?
>
> What are you looking for?
>
> The wikipedia page is a good introduction:
>   http://en.wikipedia.org/wiki/Network_Time_Protocol
>
> NTP is a big sub-set of time-nut activity with an active community of
> geeks.
> I think any time-nut documentation should point to other info rather than
> duplicate their activity.
>   http://www.ntp.org/
>
> There is also PTP, IEEE 1588
>
>
> The basic NTP "conversation" is the typical client/server exchange of a
> pair
> of UDP packets. tcpdump will decode the contents so you can easily use it
> to
> get a quick introduction.  (That's assuming you have a system running NTP
> that already generates the packets.)
>
>
>
> --
> These are my opinions.  I hate spam.
>
>
>
>
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