[ntp:questions] Proposed NTP solution for a network

Uwe Klein uwe_klein_habertwedt at t-online.de
Fri Mar 6 09:07:05 UTC 2009


Unruh wrote:

> These Gbit
> switches seem to have, or trigger in the ethernet cards, additional and
> assymetric delays of the order of 100-200usec. (assymentric delays are of
> course the worst, since they directly affect the errors in ntp). 

My guess is you see Store-n-Forward <> Passthrough indeterminisms.

i.e. some packets go via Passthrough others goe via Store-n-Forward through
the switch dependent on direction, activity on other ports of the switch
and the weather.

uwe




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