Magnus Danielson wrote:> Martin Burnicki wrote:
>> We have mades some tests and found that NTP can yield the
>> same accuracy as NTP if also hardware timestamping of NTP
>> packets is supported on all nodes, similar as for PTP.
>>
>> In fact this isn't surprising, is it?
>
> No, it's not. NTP is being perceived to be "software timestamping"
> but nothing prohibits you from doing it in hardware.
> Similarly can you implement PTP with software time-stamping
> (with shitty performance).
>
> Doing HNTP makes NTP match up against PTPv1 to some degree,
> but PTP then pulls out the explicit means to make PTP-aware
> transparent clocks to correct for delays, cancelling some
> of the asymmetry.
> You could do NTP with PTP 2-step processing,
> but what we would call such a bastard would be an
> interesting thing, NPTP?
Why not just NTP with a PTP RefClock Driver?
People Already Run (& sell) Appliances that are both
PTP & NTP servers {which doesn't seem like it should be too hard};
The question would be, which is disciplining the Appliance?
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