[ntp:questions] Interface IP address Change.

Frank Kardel kardel at ntp.org
Fri Jul 4 21:41:38 UTC 2008

kiran shirol wrote:
> Frank,
> That would be good so that the user need not have to worry about any changes 
> in the IP addresses in
> future.

This statement seems to be implying that ntpd does not detect interface 
changes. This is *NOT* the case for 4.2.4 and after. ntpd 4.2.4 
*detects* changes in interface addresses and routing. I may take a while 
for some
platforms (Windows/Linux - BSD is almost instant as it is event driven). 
The default rescans every 5 minutes. This can be lowered to 1 minute
with the -U 60 switch. -U 0 disables scanning. The lower limit of 60
seconds will be dropped in the future. The default where choosen for
a reasonable balance between computational load and responsiveness.
Thus don't expect an instant response when you are on a platform where
we have yet to implement the event mechanism. Just wait a bit.

It is documented in the html pages an in the short help of the daemon.

  I read some other mail thread on the forum and the solution
> suggested was to restart NTP. But
> that approach needs user/admin intervention and thus not a good thing to do.
> I will keep a watch on the
> bug IDs too.
> Thanks Frank for the responses.
> Kiran


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