bad horizontal referral ?

[Barry Margolin]

In article <fr96i6$1bt6$1 at sf1.isc.org>,
 "Jean-Francois Leroux" <leroux.jeanfrancois at gmail.com> wrote:

> Ok, I understand. Thanks for the explanation.
> 
> Now, here's my problem. I have two dns servers in a public zone (which
> I'm testing), and when I issue a dig myzone.com @myserver1.myzone.com
> (or myserver2) +nsserach +trace, I always get this message. Could it
> be that there's a problem with my setup? As far as I understand bind,
> it should be ok, the second one being slave of the first one. They're
> on the same level though, since both are slaves of a single master in
> the private zone. Is this a problem?

What's the zone?

> 
> 
> 2008/3/12, Kevin Darcy <kcd at chrysler.com>:
> > Jean-Francois Leroux wrote:
> >  > Thanks for the explanation, Kevin. If I may ask, what means
> >  > 'horizontal' in the message? I've had a look in my DNS & Bind book but
> >  > couldn't find anything about it...
> >  > And while I'm thinking of it, how can I know which server refers me to
> >  > a wrong address? Is this possible ?
> >  >
> >  >
> >  > 2008/3/12, Kevin Darcy <kcd at chrysler.com>:
> >  >
> >  >> Jean-Francois Leroux wrote:
> >  >>  > Hi,
> >  >>  > doing a trace with dig today I got a 'BAD (HORIZONTAL) REFERRAL'
> >  >>  > message, with the correct answer though.
> >  >>  >  What does this mean ?
> >  >>  >
> >  >>  >
> >  >>  >
> >  >>
> >  >> Referrals should be "down" not "across". If you're resolving www.foo.com
> >  >>  iteratively and along the way a delegated nameserver for foo.com refers
> >  >>  you to blah.com, that's a useless referral because it doesn't get you
> >  >>  any closer to resolving the name.
> >  >>
> >  >>  Dig probably got the correct answer because it gave up on the broken
> >  >>  nameserver and tried a different one.
> >  >>
> >
> > "Horizontal" means at the same level of the hierarchy. The DNS namespace
> >  is often viewed as being tree-like, with the "root" at the top and each
> >  level of subdomain extending downwards. If a referral is "across" rather
> >  than "down", it's "horizontal" instead of "vertical".
> >
> >  So many prepositions, so little time...
> >
> >
> >
> >       - Kevin
> >
> >
> >

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