[154986] in North American Network Operators' Group
Re: using "reserved" IPv6 space
daemon@ATHENA.MIT.EDU (Stephen Sprunk)
Wed Jul 18 12:40:15 2012
Date: Wed, 18 Jul 2012 11:39:34 -0500
From: Stephen Sprunk <stephen@sprunk.org>
To: nanog@nanog.org
In-Reply-To: <20120718134800.GA11320@pob.ytti.fi>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On 18-Jul-12 08:48, Saku Ytti wrote:
> On (2012-07-18 08:37 -0500), Stephen Sprunk wrote:
>> There is no need for [RFC2777 verifiability], since your failure to us=
e a good source of randomness hurts nobody except yourself.
>
> I think you're making fact out of opinion. Maybe SP is generating ULAs =
for their customers.
Why would they do that? SPs should only be assigning (and routing) GUAs.=
ULAs are for /local/ use within the customer site, so customers can and
should generate their own locally. An SP should never see those
addresses and can safely ignore their existence, aside from a generic
filter on the entire ULA range.
> Maybe this is not practical enough concern, but I'm wondering, what is =
the downside? What is the benefit of recommending method which is not
> testable/provable.
Those were not considered requirements for the algorithm in RFC 4193
since there is no scenario /where RFC 4193 addresses are a valid
solution in the first place/ for which testability or provability of the
algorithm's results are important or even useful.
S
--=20
Stephen Sprunk "God does not play dice." --Albert Einstein
CCIE #3723 "God is an inveterate gambler, and He throws the
K5SSS dice at every possible opportunity." --Stephen Hawking
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