[ntp:questions] Garmin 18 LVC: whether to fudge

Danny Mayer mayer at ntp.org
Mon Feb 16 04:33:58 UTC 2009


Hans Jørgen Jakobsen wrote:

>>> 20.6 ms of the roundtrip time are spend on the DSL line.
>> How do you know it is exactly 20.6ms?
>>
> I left out that I have acces to above ntpservers and have done a ping to the
> DSLAM. Ping ns.tele.dk <-> DSLAM are ~1.85ms. Symmetric delay can be assummed.
> /hjj
> 

Be warned that ping uses ICMP and not UDP so the costs are different.

Danny



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