[ntp:hackers] unconfigure

Brian Utterback brian.utterback at sun.com
Tue Jun 9 12:46:08 UTC 2009



Danny Mayer wrote:

> If this works on Solaris the same way as Windows then you need do
> nothing, it will reconfigure it's local interfaces addresses and resume
> processing. I do this every day on Windows. Usually you don't want or
> need to get new servers but that is something that we need to consider
> for the future. The sites I use right now would not change when I change
> locations but only because I'm staying in the same geographical area. On
> the other hand if you fly from Los Angeles to London you probably want
> new servers. Is this the scenario you are thinking of?

Pretty much. There are multiple factors to consider. The first is the 
one you mentioned, the possibility of a different network 
configuration. The ntpd daemon probably can recover from that in one 
way or another. Then as you also mentioned, you might need new 
servers, particularly if you are getting servers via pool, DHCP or 
mDNS, not to mention the traditional broadcast/multicast/manycast 
methods. But of more immediate concern is that fact that all of the 
data is now stale. You will very probably see a relatively large 
offset, which when it is finally detected and corrected is going to 
give a big impulse to the PLL.  All in all, it would seem that it 
might be best to punt and restart. But depending on how we end up 
implementing DHCP and mDNS (I have been envisaging external processes 
doing this) we may or may not want to be able to save the dynamic 
changes to the configuration that have been made via ntpq. Which is 
were I started this discussion.
-- 
blu

"The advertising giveth and the EULA taketh away."
----------------------------------------------------------------------
Brian Utterback - Solaris RPE, Sun Microsystems, Inc.
Ph:877-259-7345, Em:brian.utterback-at-ess-you-enn-dot-kom


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