DHCP/DDNS and CNAME

[Sylvain ROY]

For example, I've got one domain "test.com" and the reverse domain. This
domain is populated by the DHCP. What I would like to do is the following:

- Ahost is leased in the DHCP.
- The DHCP dynamically update the DDNS

pc1             IN  A       10.0.0.1                   (ok with
ddns-domainname "test.com" in dhcpd.conf)

1.0.0.10      IN PTR     pc1.TEST.COM.  (ok with ddns-rev-domainname
"in-addr.arpa" in dhcpd.conf)

AND I would like to do (this is my question ...):

pc1.test  IN CNAME pc1.TEST.COM.

Sylvain.

----- Original Message -----
From: "Will Yardley" <william+dns at hq.newdream.net>
To: <bind-users at isc.org>
Sent: Monday, September 24, 2001 9:17 AM
Subject: Re: DHCP/DDNS and CNAME


>
> Sylvain ROY wrote:
> > I don't knox how to use CNAME statis in zone file (can't find it in
> > the documentation ..)
> >
> > If you can more explain please. In fact, I would like to have
> > systematically a CNAME for each A of a zone ...
>
> can you explain your question more thoroughly?  a CNAME record is added
> in the same way that any other record is added, although there are
> certain restrictions.
>
> you _cannot_ add a CNAME for a record for which any other type of record
> already exists.
>
> ie you can have:
> www IN  A 123.123.123.123
> IN MX   0 mail.blah.com.
> or:
> www IN CNAME blah.com.
>
> but you can't have:
> www IN A 123.123.123.123
> IN CNAME somewhereelse.com.
> IN MX 0 mail.blah.com.
>
> CNAMEs are mutually exclusive of other records, and must point to a
> canonical hostname.  you should not use a CNAME for anything you will be
> pointing an MX or NS record to.
>
> can you give an example of what you're trying to do and explain why you
> need to use CNAME records?  generally it's best to avoid them altogether
> until you fully understand them, and the times when it's appropriate to
> use them.  in most cases it's better to use some other type of record.
>
> w
>
> --
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>
>