On Nov 28, 2011, at 13:25 , Ronald Bonica wrote:

> […] I will submit the draft to the full IESG for its consideration at its 
> December 1 teleconference. The draft will be published as a BCP if a 
> sufficient number of IESG members ballot "Yes" or "No Objection", and if no 
> IESG member ballots "Discuss".

Before I get started, I should offer my deepest and most sincere apologies to 
the participants who have heard quite enough about 6to4 to last a lifetime.  
Nobody is more ashamed of The 6to4 Problem than me.

I have reservations to this draft because it A) gives explicit advice to 
mitigate the addressing conflict it poses for 6to4 sites by recommending 
consideration of I-D.kuarsingh-v6ops-6to4-provider-managed-tunnel, which I 
would contend is even more controversial than Shared CGN Address Space, and B) 
it mischaracterizes the advisory guidelines in RFC 6343 with respect to the 
IPv4 Special-Use Addresses in RFC 5375, which in fact are not referenced at 
all, and indeed the language in RFC 6343, section 4.2.3 IPv4 Prefix Issues and 
section 3 Problems Observed, would seem to contradict the language in this 
draft.

I could support this draft if instead it were edited to update RFC 3056 
directly to clarify the interpretation of its IPv6 Prefix Allocation 
requirement in section 2, which currently reads:

   Suppose that a subscriber site has at least one valid, globally
   unique 32-bit IPv4 address, referred to in this document as V4ADDR.
   This address MUST be duly allocated to the site by an address
   registry (possibly via a service provider) and it MUST NOT be a
   private address [RFC 1918].

I would like to see an explicit recognition that the phrase in RFC 3056, above, 
"duly allocated to the site by an address registry (possibly a service 
provider)," MUST NOT be interpreted to include the new Shared CGN Address Space 
defined by this document.

In simpler terms, what I want is a document that clearly implies 6to4-PMT is 
not applicable with this new Shared CGN Address Space.  No, I am not joking, 
and I'm very sorry that I had to bring up the topic of 6to4 again.


--
j h woodyatt <j...@apple.com>


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