European ISP enables IPv6 for all?
swmike at swm.pp.se
Wed Dec 19 11:58:20 UTC 2007
On Wed, 19 Dec 2007, Iljitsch van Beijnum wrote:
> customers something bigger, like a /64, a /56 or even a /48. (Yes, we have
> enough address space for a /48 per customer.)
The good part about using /48 is that it gives customers an even : boundry
for their space. Apart from that, I think /56 is a better idea (or perhaps
even a /60). Good point there about autoconfiguration, subnetting using
less than /64 is probably a bad idea.
So, out of our /32, if we assign each customer a /48 we can only support
65k customers. So in order to support millions of customers, we need a new
allocation and I would really like for each new subnet allocated to be
very much larger so we in the forseeable future don't need to get a newer
one. So for larger ISPs with millions of customers, next step after /32
should be /20 (or in that neighborhood). Does RIPE/ARIN policy conform to
this, so we don't end up with ISPs themselves having tens of aggregates
(we don't need to drive the default free FIB more than what's really
Other option is to have more restrictive assignments to end users and
therefore save on the /32, but that might be bad as well (long term).
Mikael Abrahamsson email: swmike at swm.pp.se
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