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Re: DRAFT-IETF-X400OPS-DNSX400MAPS-03.TXT

Christian Huitema <Christian.Huitema@sophia.inria.fr> Tue, 23 November 1993 17:45 UTC

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To: ALLOCCHIO@elettra-ts.infn.it
Cc: ietf-osi-x400ops@cs.wisc.edu
Subject: Re: DRAFT-IETF-X400OPS-DNSX400MAPS-03.TXT
In-Reply-To: Your message of "20 Nov 1993 17:31:19 GMT." <52038102113991/40569 INFN>
Date: Tue, 23 Nov 1993 18:41:32 +0100
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From: Christian Huitema <Christian.Huitema@sophia.inria.fr>

Claudio,

I like your proposal, but for one point. You propose to store both mapping 1
and mapping 2 in the same records. This is fine, but you should only use one
format.

	*.nrc.it.             IN  PX  0  nrc.it#PRMD-nrc.ADMD-acme.C-it	
and 	*.ADMD-acme.X42D.it.  IN  PX  0  it#ADMD-acme.C-it
NOT	*.ADMD-acme.X42D.it.  IN  PX  0  ADMD-acme.C-it#it

Reason: the process always know in which direction it is converting, so it
will have no problem knowing whether to use the righthand side or the left
hand side of the #. But there are many chances that usage of CNAME or other
search strategies result in a mapping 1 being retrieved when mapping 2 was
desired. You should either have one RR type and one syntax, or two rr types if
you insist on different syntaxes.

Christian Huitema

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