1034 Resolver Algo Question

Danny Mayer mayer at gis.net
Fri Aug 20 21:31:03 UTC 2004


At 09:33 PM 8/19/2004, William Stacey wrote:
>4.3.2 Step 5 reads "Using the local resolver or a copy of its algorithm (see
>resolver section of this memo)"
>The server still uses the resolver to build answers from forwarder or hints
>right?

If it's BIND, then no. BIND keeps it's own cache and does resolution itself. It
does not depend on any local resolver.

Danny

>--
>William Stacey
>
>"Barry Margolin" <barmar at alum.mit.edu> wrote in message
>news:cg3gl2$1dp2$1 at sf1.isc.org...
> > In article <cg2prb$2nf2$1 at sf1.isc.org>,
> >  "William Stacey" <staceyw at mvps.org> wrote:
> >
> > > I also have questions on 4c of 5.3.3
> > >          "c. if the response shows a CNAME and that is not the
> > >             answer itself, cache the CNAME, change the SNAME to the
> > >             canonical name in the CNAME RR and go to step 1."
> > >
> > > 1) Why does it say "and that is not the answer itself"?  If it was the
> > > answer, 4a would have returned it already - no?
> >
> > True, this is redundant.
> >
> > > 2) It does not say anything about saving the CNAME rr anywhere.  You
>change
> > > the Sname to the canonical name in the RR and start at step 1 again.
>What
> > > happens to the CNAME we just processed?  Lost?  Or do you keep building
>an
> > > answer section in a tmp reply structure until done or error?
> >
> > What do you mean by "answer section"?  This is the algorithm for a
> > client-side resolver.  Answer sections appear in the packets sent by
> > servers; that algorithm is described in section 4.3.2.
> >
> > --
> > Barry Margolin, barmar at alum.mit.edu
> > Arlington, MA
> > *** PLEASE post questions in newsgroups, not directly to me ***
> >



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