RFC 2317

Kevin Darcy kcd at daimlerchrysler.com
Fri Mar 10 22:57:36 UTC 2000

parker at bctm.com wrote:

> Kevin,
> > RFC 2317 was really intended for delegations below the /24 level.
> > Technically, you *could* use a similar methodology at higher levels, but
> > I can't imagine, for instance, your parent preferring to create ~16,000
> > CNAMEs (one for every possible address in your range) over the
> > "traditional" model of just delegating 64 /24's to your servers.
> That wasn't what I was getting at - I was thinking there might be a way
> to arrange it such that I didn't need to maintain 64 zones... our parent
> would have 64 CNAMES (one per "zone"), we would have a single
> 64-127.60.172.in-addr.arpa zone.

No can do. CNAMEs only map names to a *single* target, so you'd need one
CNAME for every PTR in the range.

Maybe DNAMEs (see RFC 2672) would help, but they're still in an infancy

- Kevin

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