[Nottingham] "ntpq -p" displayed flags

Martin martin at ml1.co.uk
Fri Jan 27 19:51:15 UTC 2012

On 27/01/12 16:52, Michael Quaintance wrote:
>     > Will you be writing up PTP (IEEE 1588) next? ;-)

Any volunteers?

Anyone using it?

> PTP (IEEE 1588) is the Precision Time
> Protocol http://www.nist.gov/el/isd/ieee/ieee1588.cfm
> "This standard defines a protocol enabling precise synchronization of
> clocks in measurement and control systems implemented with technologies
> such as network communication, local computing and distributed objects.
> The protocol will be applicable to systems communicating by local area
> networks supporting multicast messaging including but not limited to
> Ethernet. The protocol will enable heterogeneous systems that include
> clocks of various inherent precision, resolution and stability to
> synchronize. The protocol will support system-wide synchronization
> accuracy in the sub-microsecond range with minimal network and local
> clock computing resources. The default behavior of the protocol will
> allow simple systems to be installed and operated without requiring the
> administrative attention of users."
> PTP is basically trying to be a better (more accurate) NTP. ...


Martin Lomas
martin at ml1.co.uk

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