New ARIN ipv6 allocation policies

David Barak thegameiam at
Sun Sep 3 05:46:53 CEST 2006

--- David Conrad <david.conrad at> wrote:

> Roger,
> On Sep 1, 2006, at 3:25 PM, Roger Jorgensen wrote:
> > But, we still have 7 more chances to get it right
> if I remember  
> > correctly.
> As we've learned from IPv4, I fear swamps are
> forever...

But so what if they are?  A single /32 of /48s is an
awful lot of space - Assume one PI block per
organization (because if an enterprise can actually
run out of a room in a /48, they're probably really a
service provider anyway...), and further assume that
all of the companies who have ASNs today immediately
request a PI block from the swamp.  At that point,
you're at what, 35K unique routes?   What equipment
will have trouble with this?

According to Wilhelm & Uijterwaal, the growth rate of
actual RIB-appearing ASNs is ~ 200 per month, and we
shouldn't expect to run out of 16 bits for the next 7
years or thereabouts.  Once we do, we can simply add
another /32 to the mix, and get another 15 years out
of the system for a grand total cost of 128K routes.  

So I fail to see exactly what is so bad about this -
the real gain is that no provider at any point will
need to carry another provider's more-specific routes.
     Also, any ISP which uses a default route doesn't
need to carry any of this swamp at all...

-David Barak

David Barak
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