who gets a /32 [Re: IPV6 renumbering painless?]

Fri Nov 19 04:38:45 UTC 2004

Thus spake "Paul Vixie" <paul at vix.com>
>> Actually, the policy also specifies that you must not be an end-site.
>
> well, you sure caught me this time.  in august 2002 when the /32 in 
> question
> first came to isc, i had not read the policy.  so i don't know if it was
> different from the current policy.  i assume it was, because i know that
> we qualified, officially, under the rules at the time the /32 came to us.

Okay, that explains how ISC got its PI allocation -- it's 
legacy/grandfathered.

It appears Iljitsch would have been correct to say "there is no _new_ PI in 
IPv6 unless you're an internet exchange or a root server."  As long as this 
remains true, there are nearly a dozen identified reasons why people would 
want/need ULAs, which was the original point of this subthread.

The RIRs, of course, are free to make IPv6 PI space available, and most of 
the justification for ULAs would disappear if that were to occur.  However, 
there is no indication that this is coming, so absent any other ways to meet 
those needs, ULAs have a purpose.

>> I'd be particularly interested in knowing what ISC said who would be 
>> their
>> 200 other organizations who they intended to allocate the address space
>> (their employees?), and how ISC would not be an end-site.
>>
>> This is a more generic issue, of course.
>
> of course.  in august 2002 there were no v6 isp's.  isc is multihomed, so
> it's difficult to imagine what isp we could have taken address space from
> then, or now.

According to multi6, you will get PA space from each of your ISPs and 
overlay a prefix from each on every subnet.  I'll save y'all another rant on 
the workability of that model...

Some fear that you would more likely just generate a ULA, use that 
internally, and NAT at the borders.  Or maybe you'd stick with IPv4 RFC1918 
space internally and NAT to IPv6 PA space at your borders.

> if arin's allocation policy for ipv6 does not take account of
> multihomed non-allocating enterprises then either that policy will change,
> or the internet exchange point business model will be dead.

I don't understand why exchanges would suffer; the real threat is that 
enterprises simply won't use IPv6 until IPv4 space is completely 
exhausted -- and perhaps even after it is.

> speaking as someone who's had too much coffee today, it seems possible 
> that
> the preponderance of arin's membership could prefer a pure transit world
> to a mixed transit/IXP world.

I'm not holding my breath waiting for ARIN's members -- largely ISPs -- to 
approve end sites getting IPv6 PI space, something that would make 
multihoming more likely, reduce customer lock-in, and increase routing table 
sizes; it's contrary to their collective interests.

S

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 