Re: [dnsext] we need help to make names the same, was draft-yao-dnsext-identical-resolution-02 comment

"John R. Levine" <johnl@iecc.com> Fri, 18 February 2011 06:46 UTC

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Subject: Re: [dnsext] we need help to make names the same, was draft-yao-dnsext-identical-resolution-02 comment
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> Say we have A1,A2,A3, and A4 that are all meant to be "the same", and
> we want the "official" (canonical) name used to be A1.
> Similarly, B1 for B2/B3/B4, C1 for C2/C3/C4.
>
> It would be both cumbersome, and bloated, to have to put all
> combinations into DNS as CNAMEs.
> It would also be limiting to put other requirements onto how the zone
> structure was built (such as requiring delegations/zone cuts).

I went back and reviewed the BNAME proposal on the plane this afternoon. 
Somewhat to my surprise, it looks to me like it's a plausible technical 
approach to "the same" if (and this is a big IF) we can get buy-in from 
the relevant application groups that BNAMEs mean variant spellings of the 
same web site/mail domain/whatever, rather than whatever CNAME means in 
practice now.

If you do a BNAME resolution, the result should come back with a 
synthesized CNAME along with all the BNAME records the client can use to 
see that it was BNAMEs that did it.

Regards,
John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. http://jl.ly