[131006] in North American Network Operators' Group
Re: Definitive Guide to IPv6 adoption
daemon@ATHENA.MIT.EDU (Owen DeLong)
Tue Oct 19 05:34:16 2010
From: Owen DeLong <owen@delong.com>
In-Reply-To: <4CBD3267.7070103@brightok.net>
Date: Tue, 19 Oct 2010 02:29:27 -0700
To: Jack Bates <jbates@brightok.net>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Oct 18, 2010, at 10:53 PM, Jack Bates wrote:
> On 10/18/2010 7:16 PM, Robert E. Seastrom wrote:
>> You are to be commended for your leadership in conserving space. Our
>> children will surely be grateful that thanks to your efforts they =
have
>> 99.99999% of IPv6 space left to work with rather than the paltry
>> 99.9975% that might have been their inheritance were it not for your
>> efforts. Bravo!
>=20
> Thanks. Actually, I think people are following the RIR example. ARIN =
handed out a /32 as standard for an ISP, so a /32 is the framework even =
a medium sized ISP will use.
>=20
No... ARIN hands out a MINIMUM /32. A medium sized ISP should be asking =
for larger.
> Our routing/IP Numbering Plan:
> <regional assignment><pop assignment><customer assignment>
>=20
> /40 regional assignment supporting 256 regional assignments
> /44 for only 16 pop assignments?
> /48 to customer for only 16 customers per pop assignment?
>=20
Or, better...If you're that large... Start with a /28
/36 regional assignment supporting 256 regional assignments
/40 for 16 pops per region
/48 for 256 customer end-sites per POP
or, if you have larger POPs, start with a /24 and
/32 regional assignment supporting 256 regional assignments
/36 for 16 pops per region
/48 for 4,096 customer end-sites per POP
or, if you have larger regions and more POPs per region
/28 regional assignment supporting 16 regions
/36 for 256 pops per region
/48 for 4,096 customer end-sites per POP
> Perhaps another view
>=20
> /40 regional assignment supporting 256 regional assignments
> /44 still for 16 pop assignments
> /56 to customer for 4096 customer assignments
>=20
> I'm sorry, but I just couldn't find a way to make /48 to customers =
work appropriately, and ARIN seems to think a /32 is fair, yet I have to =
design an IP assignment plan up front to make for more efficient =
routing. I actually expect a /42-/43 per pop, and /38 per region even in =
the /56 to customer model.
>=20
ARIN thinks a /32 is the MINIMUM for an ISP. Not the Maximum. Several =
ISPs have received larger than /32 and all you need to do is show a =
reasonable justification for the space.
Owen
