Re: repeating records

[Mark.Andrews@isc.org]

> Andreas Gustafsson writes:
> > Each of them SHOULD be transmitted only once
> 
> That blatantly violates RFC 2119, section 6.
> 
> > > Explaining that servers can repeat records, and requiring clients to
> > > handle repetitions, would be a clarification of the protocol.
> > That's what the draft says
> 
> And I have no objection to the draft saying that. What I object to in
> this area is the draft saying more---this ludicrous BIND-8-violating
> ``clarification'' that records ``SHOULD be transmitted only once.''
> According to RFC 2119, this means that
> 
>    there may exist valid reasons in particular circumstances to ignore a
>    particular item, but the full implications must be understood and
>    carefully weighed before choosing a different course
> 
> which nobody claims is true in this case.

	BIND 8 is a legacy implementation and has been for a while
	now.  What I find ludicrous is you ignoring the fact that
	it is a legacy implementation.  There are lots of things
	BIND 8 does that are against some RFC.  We wrote BIND 9 to
	address those issues.

	The full implications are that same record will be transmitted
	multiple times making the transmission process longer.  If
	the zone is stored to disk it without removal of the
	duplicates it will take up more space.  Applications that
	use the result need to be aware that there may be duplicates.
	All existing nameservers cope with this.  All namesevers
	that comform to the clarify draft will cope with this.

	These are NOT NEW implications.  They have existed as long as
	BIND has existed.
 
> I shouldn't have to say these things even once. The fact that I have to
> keep saying them---Gustafsson simply waits a few months and tries again;
> nothing is officially recorded in a usable form; nothing is learned---
> reflects a serious deficiency in the IETF procedures.
> 
> ---D. J. Bernstein, Associate Professor, Department of Mathematics,
> Statistics, and Computer Science, University of Illinois at Chicago
> 
> 
> 
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--
Mark Andrews, Internet Software Consortium
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PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews@isc.org

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