oops, I clipped a little too much from the message before replying... On Mon, Nov 1, 2010 at 5:28 AM, Mark Smith <nanog@85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org> wrote:
Permanent connectivity to the global IPv6 Internet, while common, should not be essential to being able to run IPv6, and neither should PI. All you should need to run IPv6 reliably is stable internal addressing. Global connectivity should be optional, and possibly only occasional.
I think there are many cases where a 'disconnected' network will want ipv6, I do NOT believe they should use ULA space except in the most extreme cases. It makes more sense to just get these folks a GUA allocation of their proper size, support their DNS and registry needs. I agree that global connectivity should be optional... I've worked on more than one network that had better never see the light of day, and will most likely need (or already has?) ipv6 deployments in the coming months/years. -chris