Most PCs support IPv6 (Windows XP & Mac OS X all have native support. Most network gear supports IPv6 (e.g. routers), but only for software-based forwarding. Hardware-based forwarding is not yet available, meaning that while you can run IPv6 in a production network, you can't run it at the same scale as you can with IPv4. In addition, most firewalls, DHCP servers, mail servers, and other support servers aren't yet IPv6 capable.
The biggest obstacle to IPv6 deployment is that they haven't figure out yet how to allow folks to connect to multiple ISPs. There are still a lot of hurdles to overcome, and of course the biggest hurdle is that nobody has figure out how to make any money with it yet.
ahh i see.. i didn't know if they had a way to convert it or not. I remember from preparing for the test it was like putting a square peg into a round hole...just sort of hard to do without a saw. But since ipv6 wasn't on the test, i didn't really go over it that much :)
The DoD is pushing the transistion to IPv6
DOD is developing a roadmap for getting to IPv6
http://www.gcn.com/vol1_no1/daily-updates/28090-1.html
Defense Department networks will have to demonstrate that they are capable of running securely and reliably under IP Version 6 before receiving approval to use the new protocols.
The deadline for moving to the new version of the Internet Protocol is 2008. Until then, IPv6 will be restricted to early adopter environments and will not be allowed on operational DOD networks. The DOD IPv6 Transition Office is developing guidelines to help networks get approval to operate.
Networks will receive authorizations to run at two levels before proceeding to the first level of operational capability, said James Schifalacqua, part of the Transition Office support team from SI International Inc. Information assurance will be a key element in receiving authorization to operate, Schifalacqua said Thursday at the U.S. IPv6 Summit in Reston, Va.
Developing a process for risk management will be the key element in getting authorization to operate with IPv6, he said.
“It’s not the technology, it’s the process,” he said. Not all risk on the network has to be eliminated, but administrators must be able to document how risks are analyzed and managed.
more at link above