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Re: I-D ACTION:draft-ietf-ipv6-unique-local-addr-08.txt




On Dec 7, 2004, at 7:44, Brian E Carpenter wrote:

Bill Manning wrote:
On Dec 6, 2004, at 10:31, Brian E Carpenter wrote:
Dan Lanciani wrote:

Mark Andrews <Mark_Andrews@xxxxxxx> wrote:
|+ Advertising locally assigned ULA AAAA records in the global DNS is
|+ MUST NOT occur as they are not globally unique and will lead
|+ to unexpected connections.
I strongly object to making this a "MUST NOT," ...



OK. Lot of shouting since this was sent but not much new text.

How about

Locally assigned ULA AAAA records MUST NOT appear in the global DNS,
since there is an extremely small probability that the corresponding
addresses are not unique. Even though these addresses will be
unrouteable in the global Internet, their leakage via DNS is highly
undesirable. Such AAAA records MAY appear in local regions of the DNS
corresponding to their region of routeability.
    keep your mitts off my zone files.
    and if the prefixes are routable -AT ALL- then i may chose to
    define my "local region" to be the Internet.

Bill, you could do that if the prefixes are *routed* but that is not going to be the case if the ULA spec is followed, except for private routing arrangements. Since the spec says they MUST NOT be globally routed, it seems entirely rational to apply the same rule to your zone files. But as I said before, I can live with SHOULD NOT.

   Brian

		please define "globally routable" in technical terms.
		and since routing is not the same as lookup, your assertion
		about the "rational" nature of registration in a lookup system
		does not hold much credence.


(And I would put an equivalent SHOULD NOT on centrally assigned ULAs.)


         Brian

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