[dns-operations] Comments regarding RFC 3484

Peter Koch pk at DENIC.DE
Tue Sep 18 18:18:49 UTC 2007

On Tue, Sep 18, 2007 at 07:57:54PM +0200, Florian Weimer wrote:
> Any more comments on this topic?

Thanks for spotting the issue.

The proximity heuristics provided by CommonPrefixLen() do not make sense
for IPv4, and only limited sense for IPv6.  At the time of publication the IPv6
addressing architecture was based upon RFC 2373, including TLA/NLA/SLA,
so the intent was good, but would still have delivered random results for
some combinations of, say, NLA ID and SLA ID.

It can be argued that v4 only isn't even affected by RFC 3484, for example
because the source address selection isn't defined vor v4 and thus can't
provide for a Source(D) for v4 addresses. This is, however, a formalistic
argument.  The basic question is what the actual state of deployment
of RFC 3484 is.  Either it should be corrected or declared Historic.
The straightforward way seems to be to approach the relevant IETF working
groups, which would be v6ops (and, to some degree, dnsop) in this case.


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