[ntp:questions] NTP sync problem. "no server reachable"

kiran shirol kiran.shirol at gmail.com
Fri Mar 6 16:51:11 UTC 2009

Thanks Martin for the response.

Unfornutately I reloaded the box and was not able to collect the output of 
the "ntpq -p". However the two servers which I had configured were just 2-3 
mins apart.
Can you please explain what would be going wrong here ?

Kiran S Shirol

"Martin Burnicki" <martin.burnicki at meinberg.de> wrote in message 
news:7d6786-c9q.ln1 at gateway.py.meinberg.de...
> Kiran,
> kiran shirol wrote:
>> Hi NTP experts,
>> I am facing a issue in getting the NTP to sync with the server 
>> configured.
>> Description:
>> I have a box which has 2 interfaces. One interface for the connectivity
>> with the local-lan. The other
>> interface is connected directly to a linux box.
>> IP address details :
>> NTP server in the network --
>> NTP server directly connected --
>> When I configure as my NTP server, within a few seconds I am 
>> able
>> to see the sync.
>> When I configure the additional server, it goes out of sync.
>> But I am able to see
>> the packet exchange happening.
>> Now if i remove from the list, I get into sync &
>> vice-versa.
>> When I have configured both the servers, I see "no server reachable"
>> message in the debugs.
>> Can someone please tell me what is going on here ?
>> My system is a regular Linux machine. I am running a older NTP version
>> 4.2.0a.
> Can you send us the output of "ntpq -p" after both servers have been
> configured and the NTP daemon has been running for a couple of minutes?
> Possibly both upstream servers distribute times which are too different, 
> so
> your NTP daemon does not know which one has the "right" time.
> This is why you should configure 3 or even more servers, see:
> http://support.ntp.org/bin/view/Support/SelectingOffsiteNTPServers#Section_5.3.3.
> Martin
> -- 
> Martin Burnicki
> Meinberg Funkuhren
> Bad Pyrmont
> Germany 

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