Network World reports there are lots of problems with IPv6 in Windows Vista:
Network management software vendors and users are reporting problems with Vista’s IPv6 implementation.
“Vista is showing some serious deficiencies around IPv6 and IPv4 insofar as their compliance or the transparency of their compliance around IP behaviors,” says Loki Jorgenson, chief scientist for Apparent Networks, a provider of network assessment and optimization tools.
“For example, Vista doesn’t expose any of the [Internet Control Message Protocol] errors to applications running on Vista,” Jorgenson says. “The application can’t get access to that message, and subsequently all it sees is that the network connection is not working. This is a big challenge for us around Vista. It’s not clear at all why IPv6 isn’t properly supported in this regard.”
Duane Murphy, president of Managed Information Services in Long Beach, Calif., says he has experienced problems with Vista’s IPv6 implementation on the networks he runs for law firms. Murphy used Network Instruments' Observer 12 application, which supports IPv6, to isolate Vista’s IPv6 problems.