[ntp:questions] Is dispersion > jitter in all situations

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Tue Jan 5 23:34:32 UTC 2010


In article <slrnhk7469.kji.unruh at wormhole.physics.ubc.ca>,
 unruh <unruh at wormhole.physics.ubc.ca> writes:

>As I said, it is possible that all outgoing ntp requests go via a 1Gb
>ethernet, and all return packets go via a 300baud modem. In that case
>the estimate of 1/2 the round trip would be a good estimate of the
>systematic error. Unfortunately there is absolutely nothing ntp can do
>on its own to figure that out. 

A more likely cause for asymmetry is queueing delays on home DSL links.
Nasty.

-- 
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