Multiple masters expected behavior?

Laws, Peter C. plaws at ou.edu
Sun Jul 25 16:58:58 UTC 2010


Understood, but what I'm asking about is that the slave does not appear to be losing contact with the first-listed master.  In fact, from the logs, it appears to be flipping back and forth (though not round-robinning).  

Someone else asked, essentially, "why?" ...  The network paths are diverse to the different interfaces so, while I'm not protecting against failure of the master, I am protecting against network path failure.  

--
Peter Laws / N5UWY
National Weather Center / Network Operations Center / Web
University of Oklahoma Information Technology
plaws at ou.edu

________________________________________
From: bind-users-bounces+plaws=ou.edu at lists.isc.org [bind-users-bounces+plaws=ou.edu at lists.isc.org] on behalf of Barry Margolin [barmar at alum.mit.edu]
Sent: Saturday, July 24, 2010 07:09
To: comp-protocols-dns-bind at isc.org
Subject: Re: Multiple masters expected behavior?

In article <mailman.83.1279918361.15649.bind-users at lists.isc.org>,
 Peter Laws <plaws at ou.edu> wrote:

> On 07/22/10 19:57, Barry Margolin wrote:
> > In article<mailman.65.1279835965.15649.bind-users at lists.isc.org>,
> >   Peter Laws<plaws at ou.edu>  wrote:
> >
> >> I have multiple interfaces on my master and multiple interfaces on most of
> >> my slaves.
> >>
>
>
> >>
> >> Is that expected behavior?
> >
> > Yes.  What if the first server stops getting updates, but the second one
> > does and has a higher serial number?  Don't you want the slaves to check
> > the SOA record on it to pick up these changes?
>
> Except that the 2 "masters" are simply different interfaces on the same
> master ... so the serial number *better* always be the same!

That's true in *your* case.  But BIND was designed to handle the more
general case, where the masters can be different machines.

--
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE don't copy me on replies, I'll read them in the group ***
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