[ntp:questions] What exactly does "Maximum Distance Exceded" mean?

David Woolley david at ex.djwhome.demon.co.uk.invalid
Fri Mar 13 07:41:28 UTC 2009


Joseph Gwinn wrote:

> What is this error likely telling me?  What are the possibilities?  What 
> tests will tell the tale?

Your timeservers are unsynchronised, but for some reason not setting 
their stratum to 16.

Distance exceeded means that the combination of worst case round trip 
time induced error and an assumed drift of 15ppm since the last valid 
time on the root server (plus a few minor components) has exceeded 1 second.

It commonly happens with w32time servers that have been synchronized 
once but left to drift.  It can also happen if the servers are orphan 
mode, and haven't had a real time source for too long, and you are not 
using the very latest orphan mode code.




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