On 24-aug-2007, at 17:28, David Conrad wrote:
If you obtain address space from a service provider and you decide
to change providers, you have (in most cases) two options: renumber
or deploy NAT.
Nonsense.
Assuming you're not going to take the address space with you (which
is not a given, btw), there's no way to avoid renumbering. If you use
NAT with RFC 1918 addresses internally the renumbering is limited to
stuff outside your internal network. And this is the hard part
anyway. But if you don't use NAT adopting NAT means you'll have to
renumber internally as well because someone else will be using your
old addresses in the future so you can't keep using them internally.
I think it's time that the ietf(_at_)ietf(_dot_)org filters flag all messages
with the word "NAT" in it as spam. NAT discussions are always
fruitless: we're not going to get rid of it in the IPv4 world and
using it even more than today won't fix any of our problems, so NAT
is orthogonal to any high-level IETF discussion.
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