[ntp:questions] Re: What does refer to?

David Woolley david at djwhome.demon.co.uk
Wed Nov 9 06:30:50 UTC 2005

In article <pan.2005. at mail.localhost.invalid>,
"Tim <tim at mail.localhost.invalid>" wrote:

> as it's clock via the DHCP daemon (a local server for the LAN).  The local
> clock setting is a manual thing left in so NTP carries on running if the
> network is down.

NTP continues to run regardless of whether or not the network is up, and
regardless of whether there is a local clock configured.  Local clocks
should never be used on leaf nodes.  Also, it is conventional to use a
stratum more like 10, to minimise the damage if anything does try and
synch to a machine using a free running local clock.

When used as a fallback on servers, local clocks compromise the ability 
to estimate the uncertainty in the time, because root dispersion and delay
are reset when the local clock is selected.

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