[ntp:questions] multiple instances of NTP on different interfaces

Brian Utterback brian.utterback at oracle.com
Wed Mar 6 13:20:46 UTC 2013

On 3/5/2013 11:25 PM, Abu Abdullah wrote:
> On Tue, Mar 5, 2013 at 11:18 PM, Brian Utterback 
> <brian.utterback at oracle.com <mailto:brian.utterback at oracle.com>> wrote:
>     Based on what is being requested, I can suggest one way to
>     accomplish it, but it involves using an OS feature, rather than
>     using an NTP feature.
>     If it is feasible to run Oracle Solaris on the system in question,
>     you could use the Solaris Zones feature to do what you want. You
>     could have one instance of ntpd running in one zone with one set
>     of interfaces which controls the system clock and have another
>     instance in a separate zone configured with the other set of
>     interfaces configured with the LOCAL refclock only so it never
>     tries to change the clock, but will instead serve time only. There
>     is an interlock mechanism in the ntpd configuration on Solaris to
>     prevent ntpd from running in a zone but there is an override to
>     the interlock if you really want to do it and you know what you
>     are doing.
>     Just a thought.
> Thanks Bria, we are using RedHat so I think the equivalent is KVM but 
> right now I'm trying to find if there is an easier way.

Zones are easier to use and lighter weight than KVM (single kernel image 
with zones), but if you need to use Red Hat then the KVM may be the 
closest equivalent.


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