From: Stephanie C (stepchung@gmail.com)
Date: Thu Mar 30 2006 - 17:13:01 EST
Few friends in the list have contacted me for more information about NTP. I
find Bill's responce is very helpful that I would like to share with all of
you again. Thanks, Bill and Others.
Step
---------- Forwarded message ----------
From: Bill Hassell <bill@billhassell.com>
Date: Mar 28, 2006 4:28 AM
Subject: RE: [HPADM] Need Help in NTP
To: Stephanie C <stepchung@gmail.com>
Much too complicated. Don't put anything in the drift file. xntpd will
manage it's contents. Put all your time sources in /etc/ntp.conf
and add the drift file name. ntp.conf has a huge number of comments
which can be completely deleted (an original copy of ntp.conf is
found in /usr/newconfig/etc). Your entire ntp.conf file would be:
server 0.pool.ntp.org
server 1.pool.ntp.org
server 2.pool.ntp.org
driftfile /etc/ntp.drift
However, you might want to add alternate sources such as
rolex.usg.edu and time.nist.gov. As I mentioned, 5 or more
sources are recommended for highest reliability. Always
test a new source by using:
ntpq -p rolex.usg.edu
You will be querying the NTP server to check not only
accessability but read it's own server list. ntpq -p without
a server name checks your own server.
And to bounce the xntpd daemon, just use:
/sbin/init.d/xntpd stop
/sbin/init.d/xntpd start
You'll see the startup messages in syslog. NOTE: this
bounce will 'jump' the time if necessary. If your client is
running an active database, you might want to put the
database in a readonly or backup mode, then bounce
the xntpd service and put the databases back online.
Bill
-----Original Message-----
*From:* Stephanie C [mailto:stepchung@gmail.com]
*Sent:* Monday, March 27, 2006 7:28 PM
*To:* Bill Hassell
*Subject:* Re: [HPADM] Need Help in NTP
Hi Bill,
Thank you for the information. The www.ntp.org NTP server mentions about the
pool of NTP servers. If I use the pool, I have to do the following tasks
(not sure if this is correct).
1. Create /etc/ntp.drift file with the following lines:
server 0.pool.ntp.org
server 1.pool.ntp.org
server 2.pool.ntp.org
2. Un-comment line "#driftfile /etc/ntp.drift" in /etc/ntp.conf
3. Bounce NTP daemon.
Step.
On 3/27/06, Bill Hassell <bill@billhassell.com> wrote:
>
> You should have no less than 5 NTP servers in your ntp.conf file.
> However, always use ntpq -p to check your local client's connection
> to the server. Now all xntpd messages are logged syslog unless
> you have disabled info or warning messages. In fact, every time
> you start xntpd, there will be a log message. If not, look at
> /etc/syslog.conf for some changes. You can get a clean copy
> of syslog.conf from /usr/newconfig/etc.
>
> To find NTP servers, go to: www.ntp.org
>
> Bill
>
> -----Original Message-----
> *From:* hpux-admin-owner@DutchWorks.nl [mailto:
> hpux-admin-owner@DutchWorks.nl] *On Behalf Of *Stephanie C
> *Sent:* Monday, March 27, 2006 3:42 PM
> *To:* HP-UX Group
> *Subject:* [HPADM] Need Help in NTP
>
> We are running NTP server on an A500 HP-UX 11.11. This server is getting
> the time from 'ntp-nasa.arc.nasa.gov '. All our servers are looking at
> this A500 server for time sychronization. Lately, with some reason, the time
> sychronization stops working eventhough the NTP daemon is running. I have to
> manually stop and bounce the NTP then everything is working again. This
> starts to happen often now. Do you know what is the cause? Syslog does not
> show anything related with NTP. What source (NTP server) are you using for
> your servers time sychronization? Thanks.
>
> Step.
>
>
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