On 2015-02-20 12:19, Roger wrote:
On 20 Feb 2015 17:49:15 GMT, Rob <[email protected]> wrote:
Roger <[email protected]> wrote:
On Fri, 20 Feb 2015 12:45:54 +0000, Roger
<[email protected]> wrote:
After about 11 minutes it has dropped one, leaving 6 servers.
I'll continue to monitor and report back.
Just to recap, I now have this in my ntp.conf:
pool 0.uk.pool.ntp.org
pool 1.uk.pool.ntp.org
pool 2.uk.pool.ntp.org
pool 3.uk.pool.ntp.org
Why not just:
pool pool.ntp.org
That should be enough.
I did have just one line "pool uk.pool.ntp.org" but the rogue
server didn't get dropped even after 27 hours. I included the
"uk" to try to make sure that the servers were as local as
possible. Without that they could be anywhere in Europe.
Terje made the suggestion about too few servers. DNS returns 4
IP addresses at a time. By having four lines ntpd could have 12
different IP addresses returned if it used all four lines.
As I'm not capable of going through the source code and trying
to work out the best strategy I have to do it by trial and
error.
Add iburst preempt to the ends of your pool server lines to improve startup and
drop poorer sources.
--
Take care. Thanks, Brian Inglis
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