the alleged evils of NAT, was Rate of growth on IPv6 not fast enough?

Paul Timmins paul at
Thu Apr 29 10:29:43 CDT 2010

David Conrad wrote:
> On Apr 28, 2010, at 2:38 PM, Carl Rosevear wrote:
>> I don't understand why anyone thinks NAT should be a fundamental part of the v6 internet 
> Perhaps the ability to change service providers without having to renumber?
Number your internal network on ULA, and put public addresses on your 
machines as well.

RFC3484 support in your OS will cause your machine to use ULA to talk to 
other ULA interfaces, and the public IP to the rest of the internet.

If you change ISPs, send out an RA with the new addresses, wait a bit, 
then send out an RA with lifetime 0 on the old address. All the machines 
should drop their old ISP's IP, and start using the new ISP, as well as 
continue using ULA like nothing's changed for the internal file 

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