NTP fails synchronization with server at startup
Nigel Henry
cave.dnb at tiscali.fr
Wed Dec 5 23:33:39 UTC 2007
On Thursday 06 December 2007 00:07, Paul Smith wrote:
> On Dec 5, 2007 10:12 PM, Nigel Henry <cave.dnb at tiscali.fr> wrote:
> > > > Another thing. Are you sure that ntp isn't doing it's stuff, even
> > > > though the bootup shows a fail. Before you do the ntpd restart, run
> > > > the following as user.
> > > >
> > > > /usr/sbin/ntpq
> > > > then type pe, which will give you some info on which servers ntp is
> > > > trying to connect to, and how successfull it is being. You can keep
> > > > typing pe at intervals, which will show ntp's progress at reaching a
> > > > point where a time server is being used as a "sys peer". The server
> > > > being used will be prefixed by a "*". Other useable servers will be
> > > > prefixed by a "+" "candidat". To quit ntpq type q.
> > >
> > > Thanks, Nigel. In fact,
> > > # /usr/sbin/ntpq
> > > ntpq> pe
> > > No association ID's returned
> > > ntpq> pe
> > > remote refid st t when poll reach delay offset
> > > jitter
> > > =======================================================================
> > >==== === clock-a.develoo 192.12.19.20 2 u 28 64 3 190.143
> > > 438.261 9.311 ntpq>
> >
> > Well it appears to have a connection to the timeserver here, and often
> > takes a while before the timeserver is accepted as a system peer. Then an
> > "*" will appear before clock-a.develoo. Your reach is showing as 3, and
> > will gradually progress until it reaches 377, but this can take some
> > time.
> >
> > > i.e., when I run pe after a while, I get the above, but the first time
> > > I run pe, I get
> > >
> > > 'No association ID's returned'
> >
> > That usually indicates that ntp cannot contact the timeserver, no network
> > connection, or the timeserver is not accessable.
> >
> > > Can I be sure that ntp is running now and synchronizing with a ntp
> > > server?
> >
> > It appears to be running, but I think you have a problem in only having
> > one timeserver available.
> >
> > > Paul
> >
> > Paul. I'd still suggest that you add more timeservers to your
> > /etc/ntp.conf. Try the 3 that I am using. I know they are not the closest
> > to you, but they have been reliable for me. As I mentioned earlier, make
> > sure that everything in /etc/ntp.conf is commented out, except the
> > driftfile line, comment out also your present server, and add the ones
> > I've listed below. Save the changes, restart the ntp daemon, and rerun
> > /usr/sbin/ntpq. Type pe every minute or so, and see how it progresses.
> >
> > server ntp.obspm.fr
> > server ntp.kamino.fr
> > server ntp2.belbone.be
> >
> > Is this just the one machine you have connected to the Internet, or are
> > you on a LAN with other machines that are also using ntp to get their
> > time from Internet timeservers?
>
> Thanks again, Nigel. Does it seem that it is working now?
>
> # /usr/sbin/ntpq
> ntpq> pe
> remote refid st t when poll reach delay offset
> jitter
> ===========================================================================
>=== *syrte8.obspm.fr 134.157.254.19 2 u 27 64 377 62.413 132.612
> 16.037 +ns1.kamino.fr 193.52.184.106 2 u 20 64 377 85.748
> 119.231 10.125 +ntp2.belbone.be 195.13.23.6 2 u 54 64 377
> 69.566 104.344 12.046 ntpq>
>
> No, I am directly connected to the Internet, with no LAN in between.
>
> Paul
That looks fine, and just what I'd expect to see.
Nigel.
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