Re: It's Ars Tech's turn to bang the IPv4 exhaustion drum

* Michael Thomas · * Tue Aug 19 13:26:01 2008

Justin M. Streiner wrote:

On Tue, 19 Aug 2008, [email protected] wrote:
I don't have a problem with assigning customers a /64 of v6
space.

Why so little? Normally customers get a /48 except for residential
customers who can be given a /56 if you want to keep track of
different block sizes. If ARIN will give you a /48 for every
customer, then why be miserly with addresses?

I don't operate an ISP network (not anymore, anyway...). My customers
are departments within my organization, so a /64 per department/VLAN is
more sane/reasonable for my environment.

Uh, the lower 64 bits of an IP6 address aren't used for routing you
know? They're essentially the mac address, or some other sort of
autoconf'd host identifier. Last I heard, the smallest allocation is
supposed to be a /48 -- I hadn't heard of the /56 thing that Michael
was speaking of, though I'm not surprised. There's 64 bits for
routing... no need to be so stingy :)
 Mike