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DHCPv6, was: Re: IPv6 Finally gets off the ground
On 10-apr-2007, at 18:12, David W. Hankins wrote:
IPv6 has had operating system and router support for years.
I'd have to object with such a blanket statement.
I have a Cisco 2500 with software from 1999 and a Windows XP box with software from 2001, both supporting IPv6, sitting here... I didn't get my first Mac until 2002, but that one supported IPv6 at that point, too.
I don't think you can say you support IPv6 (from an ISP's point of view) without DHCPv6, since I don't think anyone at a large ISP sized scale is going to leave address assignment up to RTADV.
There is a provisioning problem with IPv6, yes. For instance, you can't get an IPv6 address over PPP, like you can with IPv4. But I don't see how DHCPv6 solves that. I can see how _enterprises_ might like DHCPv6, because hosts coming up with the bottom 64 bits of the address is just way to anarchistic for them. But ISPs don't care. They'll just give out prefixes rather than individual addresses, so the router advertisements vs router advertisements + DHCPv6 question never comes up. (Yes, if you have DHCPv6 you still need RAs because DHCPv6 can't give you a default gateway.) And customers rarely connect their hosts directly to ISP-controlled boxes these days, there is usually some kind of home gateway involved.