[DNSOP] BULK RR as optional feature

"John Levine" <johnl@taugh.com> Tue, 28 March 2017 18:32 UTC

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Date: 28 Mar 2017 18:31:56 -0000
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From: "John Levine" <johnl@taugh.com>
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Subject: [DNSOP] BULK RR as optional feature
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At yesterday's session, Tale confirmed that since BULK adds so much
new special purpose complexity to DNS servers, the plan is that
support for it will be optional.

An optional RRTYPE with extra semantics introduces some new
compatibility problems.  What happens if a server that doesn't support
BULK tries to load a local zone file with a BULK record.  Does it
reject the whole file, ignore the record, or something else?  What if
such a server receives BULK by AXFR?  By IXFR?  What if one shows up
in a cache from a buggy authoritative server?  In all of these cases,
the current RFC 3597 behavior will just return the BULK record which
seems wrong.

I continue to think that this kind of feature belongs in special
purpose DNS servers, not in the core DNS.

R's,
John