[ntp:questions] Two servers, one client : one problem

Yann I. yann.frm at gmail.com
Wed May 4 13:53:18 UTC 2011

Yes I have only two servers. The architecture has been defined with only two
servers which should be synchronized to another servers.

My problem is that I haven't access to internet. So I tried to create a
server with a stratum 3, two servers witch stratum 4 (and the "peer"
mecanism) and a client. I'll try and post the result.

2011/5/4 Richard B. Gilbert <rgilbert88 at comcast.net>

> On 5/3/2011 12:58 PM, Yann I. wrote:
>> Hi !
>> I have some problems about the configuration of ntp servers and client.
>> You'll find the configurations used for the test and some outputs (of
>> "ntpq
>> -p" for example).
>> First of all, the both servers are standalone and are not synchronized
>> with
>> an external ntp server. Later, they'll be connected to external ntp
>> server.
>> Later...
>> The servers and client don't use iptable.
>>  <snip>
> NTP is hierarchical!  It expects to get time from an external source such
> as NTP servers on the internet.  The hierarchy starts with an "atomic clock"
>  such as those operated by NIST or equivalent.  These are referred to as
> "Stratum 1".  Servers that get time from a stratum 1 server are referred to
> as "Stratum 2".  Servers that get time from a stratum 2 server are referred
> to as "Stratum 3".
> It looks as if you have created, or attempted to create a "circle jerk".
> Another problem is that you have only two servers configured.  If they
> disagree, which one will you believe?  Four servers are required for the
> minimum "robust" configuration.
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