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Re: IPv6 addresses really are scarce after all

2007-08-28 15:38:00


--On Tuesday, 28 August, 2007 15:06 -0700 David Kessens
<david(_dot_)kessens(_at_)nsn(_dot_)com> wrote:


Thomas,

On Tue, Aug 28, 2007 at 04:09:14PM -0400, Thomas Narten wrote:

We shouldn't be surprised that a "one size fits all" approach
(where home users get the same amount of space by default as
an IBM or Microsoft) doesn't seem to make a lot of sense to
some people.

US    2001:49c0::/32          2001:49c0::/32          IBM-IPV6-01
US    2001:4898::/32          2001:4898::/32          MICROSOFT-IPV6-BLK

If there really is a "one size fits all" policy, 
where can I get my personal IPv6 /32 allocation ?

Conversely, if /48 is sufficient for any plausible enterprise,
is ARIN being appropriately conservative about addresses here?

Even extrapolation from the new ARIN table 

* /64 - Site needing only a single subnet.
* /60 - Site with 2-3 subnets initially.
* /56 - Site with 4-7 subnets initially.
* /52 - Site with 8-15 subnets initially.
* /48 - Site with 16+ subnets initially.

would give 
  /44 - 32 subnets plus
  /40 - 64 subnets plus
  /36 - 128 subnets plus
  /32 - 256 subnets plus

Well, maybe I/we believe that is plausible and maybe we don't,
but it seems to me that it is a significant change in policy and
that a "subnets needed" model is, at that scale, a significant
change from policies based simply on HD-ratios (which don't
consider the number of subnets in an allocation at all as far as
I can tell).

    john






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