nanog mailing list archives

Re: Load balancing/Multiple CNAME's (Was: Re: Beyond DNS...)


From: Studded <Studded () san rr com>
Date: Fri, 05 Jun 1998 17:47:11 -0700

Michael Shields wrote:

In article <35788244.55A2D71 () san rr com>,
Studded <Studded () san rr com> wrote:
For the same reason you can't CNAME a zone's root to something else
(meaning, if I am setting up the zone map for n.ml.org, I can CNAME
web.n.ml.org to narnia.n.ml.org,

      Right.

but I can't CNAME n.ml.org to
narnia.n.ml.org, nor can I CNAME n.ml.org to ftp.microsoft.com, or any
other host),

      Why not?

Because you cannot have CNAME RRs along with any other RR, including
NS and SOA.  DNSSEC RRs are excepted.

        True, the example was a little fuzzy. If n.ml.org is the origin of that
zone then no, you can't add a CNAME for it. My point was that if it's
valid to point a name at a CNAME there is nothing wrong with pointing it
to one outside the zone, which is a common misconception. Sorry for the
confusion. 
 
      Finally, if you plan to disagree with anything in this post, please
quote chapter and verse from the relevant RFC. I've spent a lot of time
studying this topic and am quite sure of my facts.

RFC 2181 section 10.1.

        Sorry I wasn't clear. I meant that you should actually quote the
material you want to refer to. I can't find any RFC 2181 either at
ftp://rs.internic.net/rfc/ or ftp://ftp.ietf.org/. If you would be so
kind as to quote exactly what you are referring to and provide a URL so
that I can check out the context I'd appreciate it.

Thanks,

Doug
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