[ntp:questions] What happens if ntp server unavailable at start up?

Steve Kostecke kostecke at ntp.org
Thu Sep 11 19:34:46 UTC 2008

On 2008-09-11, Bill Unruh <unruh at physics.ubc.ca> wrote:

> A question has arisen in another group-- What happens if, when ntp starts
> up, the remoter server is unavailable ( eg no DNS or no connection)?
> This is highly likely to be the case for a laptop for example, where the
> connection with the local network is only brought up by the user after a
> while, or on wakeup from a power outage when the net may be unstable or the
> router be out when ntp comes up. 

As of 4.2.4p5 ntpd does the right thing in these situations. Here's an
extract from the stable release ChangeLog:

(4.2.4p5) 2008/08/17 Released by Harlan Stenn <stenn at ntp.org>

* [Bug 841] Obsolete the "dynamic" keyword and make deferred
  binding to local interfaces the default.
  Emit a warning if that keyword is used for configuration.

The complete ChangeLog is at http://archive.ntp.org/ntp4/ChangeLog-stable

Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/

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