bad horizontal referral ?

Jean-François Leroux leroux.jeanfrancois at gmail.com
Thu Mar 13 08:19:57 UTC 2008


The zone, in my example, is called myzone.com. Private zone is
private.myzone.com.

2008/3/13, Barry Margolin <barmar at alum.mit.edu>:
> 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 ***
>
>


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