[ntp:questions] Isolated Network Drift Problem

Unruh unruh-spam at physics.ubc.ca
Wed Nov 26 00:57:19 UTC 2008

David Woolley <david at ex.djwhome.demon.co.uk.invalid> writes:

>Cal Webster wrote:

>> None of our client machines use the local clock. The servers configured
>> like this are the other 3 "peer" NTP servers. Don't they need some type
>> of time reference if the master server becomes unreachable?

>No.  PCs keep time even without NTP installed.

>ntpd disciplines the local clock.  If you use the local clock as your 
>reference, it will always read exactly the same as the local clock being 
>disciplined, so no corrections will ever be made.  You have fallen for 
>an urban legend!

>The Local Clock driver is a fiction used to allow an unsynchronised 
>machine to appear synchronised to downstream machines.

Precisely and I suspect that he is asking "Does not the client have to see
that the server is synchronized in order to use it as a server?"

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