[arin-ppml] v4 to v6 obstacles

[Lee Howard]

> I think that 80% number is misleading.  You're talking 80% because these

> guys have a lot of content, not because they have a lot of websites.  The
> other 20% could be comprised of literally 10s or 100s of million websites,
> all of which also need to be accessible to everyone for the transition to be
> a success.  Just because I can get to the top 50 websites on the internet
> doesn't mean that I don't need access to the other 500 million (or whatever
> the number is).  

Yes, there's a long tail.  But several of the largest companies hosting those 
long-tail websites have also declared IPv6 plans.  If you run 
www.MomAndPopsBaitAndTackle.com off a virtual server in a mammoth
web hoster, you may never  even know that your site is now available over
IPv6.

Set some intermediate goals:  50%, 80%, 93%, 98%, 99.6%.
Do we define penetration by number of hosts reachable by IPv6, or
number of bits passed over IPv6, or number of IPv6 flows?  

Lee