[ntp:questions] systems won't synchronize no matter what

Richard B. Gilbert rgilbert88 at comcast.net
Sun Oct 24 19:53:09 UTC 2010


On 10/22/2010 2:24 PM, Florin Andrei wrote:
> I've 3 machines that would not synchronize to NTP servers no matter
> what. They always end up stratum 10. They are regular Dell servers,
> kernel 2.6.18-128.7.1.0.1.el5, ntp 4.2.2p1-7.el5
>
> I tried to sync up to local NTP servers, I tried the US pool, I cleaned
> up the drift file, nothing works, even though the initial offset is
> really small (ntpdate seems to work).
>
>
> Config file:
>
> server 10.10.16.65 iburst
> server 10.10.16.64 iburst

You need to configure at least one more server here, two more would be 
better.

> server 127.127.1.0 # local clock
> fudge 127.127.1.0 stratum 10
> driftfile /etc/ntp/drift
> restrict 127.0.0.0 mask 255.0.0.0
> restrict 192.168.3.0 mask 255.255.255.0 nomodify notrap
> restrict default ignore

Lose the restrict statements.  Getting it working first!

You may have to ask your networking people to allow NTP traffic to get 
through the firewall.  Port 123 should  be allowed.
>
>
> Command line:
>
> ntpd -d -s /var/lib/ntp/stats -x -u ntp:ntp -p /var/run/ntpd.pid
>
>
> This is the state they end up in:
>
> # ntpq -p
> remote refid st t when poll reach delay offset jitter
> ==============================================================================
>
> ut12 .INIT. 16 u - 64 0 0.000 0.000 0.000
> ut11 .INIT. 16 u - 64 0 0.000 0.000 0.000
> *LOCAL(0) .LOCL. 10 l 2 64 77 0.000 0.000 0.001

I don't see where you configured ut12 and ut11!!!!

You need to wait a few minutes after startup before ntpq can tell you 
anything useful!  I'd wait at least five minutes before issuing ntpq -p.


>
>
> This is the status of one of the servers they are querying:
>
> remote refid st t when poll reach delay offset jitter
> ==============================================================================
>
> +ns1.tic.com 128.9.176.30 2 u 74 1024 377 54.117 -3.711 42.480
> +you.dontlike.us 128.4.40.12 3 u 30 1024 377 76.102 -1.723 0.183
> *clock.team-cymr 172.16.65.22 2 u 100 1024 377 67.046 3.628 0.130
> LOCAL(0) .LOCL. 10 l 31 64 377 0.000 0.000 0.001
>
>
<snip>





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