Maybe they should have used internet2 as a mechanism of getting people moved to ipv6 by requiring IPv6 only on internet2. As the migration to internet2 continues, this sould also force migration to IPv6. Vendors who want to sell to customer on internet2 would have to support IPv6. Organizations that have completed the move to internet2 would be given new space in IPv6 and have to return any IPv4 space as part of the move.
Might seem a little draconian, but might also get the conversoin done with less disruption overall.
Admittedly an interesting thought to encourage propagation, but then again, you can't treat an IPv6 migration as if IPv4 is just going to disappear overnight. So, that type of co-existance might actually be a good thing. Interop is typically where most issues occur. Pure v4 or v6 stacks are typically no brainers. -- Christian Kuhtz, Sr. Network Architect Architecture, BellSouth.net <ck@arch.bellsouth.net> -wk, <ck@gnu.org> -hm Atlanta, GA "Speaking for myself only."