Re: [Hampshire] ntpd vs. ptpd

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Author: Benjie Gillam
Date:  
To: Hampshire LUG Discussion List
Subject: Re: [Hampshire] ntpd vs. ptpd


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On 27 Jan 2012, at 19:42, Anton Piatek <anton@???> wrote:

> Could you be any more blunt about this?
>
> Anton
> -
> Anton Piatek
> (sent from my phone, please excuse any typos)
> email: anton@???
> blog/photos: http://www.strangeparty.com
> pgp: [74B1FA37] (http:// www.strangeparty.com/anton.asc)
>
> No trees were destroyed in the sending of this message, however, a significant number of electrons were terribly inconvenienced.
>
> On Jan 25, 2012 3:39 PM, "Vic" <lug@???> wrote:
>
> > I thought that only worked when transmitted over a serial link, i.e. ATM
> > or DVB.
>
> You thought wrong.
>
> > It is not so effective on packet based links such as Ethernet.
>
> All headend distribution systems these days are Ethernet-based. It is
> incredibly effective.
>
> > I have never heard of those timestamps being used to synchronize
> > multiple endpoints.
>
> I'm sure there are many thing in the Universe of which you have not heard.
> This does not mean they do not exist.
>
> > I have only ever seen them used to do synchronization within each
> > device in the chain.
>
> This leaves us with one of two possible situations :-
>
> - Timestamps aren't used in this way
> - You are not omniscient.
>
> Given that I've worked on these systems for quite a few years, I know
> which one I believe to be true.
>
> Vic.
>
>
>
>
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> --
> Please post to: Hampshire@???
> Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire
> LUG URL: http://www.hantslug.org.uk
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Please post to: Hampshire@???
Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire
LUG URL: http://www.hantslug.org.uk
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