[ntp:questions] NTP - orphan mode with SAME stratum ("tos orphan 6") FAIL to sync.

Steve Kostecke kostecke at ntp.org
Tue Apr 7 12:18:43 UTC 2009

On 2009-04-07, David Woolley <david at ex.djwhome.demon.co.uk.invalid> wrote:
> Steve Kostecke wrote:
>> While ordinary NTP clients use a selection metric based on delay and
>> dispersion, orphan children use a metric computed from the IP address of
>> each core server. Each orphan child chooses the orphan parent as the
>> root server with the smallest metric.
>  From what Dr Mills has just written, that's yet another thing about 
> orphan mode that only works in the very latest development version.

Orphan Mode is also present in the current Stable release and is
documented at http://doc.ntp.org/4.2.4/manyopt.html#orphan

Orphan parents show offset zero, root delay zero and reference ID, which of course is the Unix loopback address. Orphan children
show the mitigated offset of their servers, root delay randomized over
a moderate range and reference ID of their system peer. An important
distinction is that the entire subnet operates at the same orphan
stratum and that the order of preference is the root delay, not the
stratum and root distance as usual."

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

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