North American Network Operators Group

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Re: Access to the IPv4 net for IPv6-only systems, was: Re: WG Action: Conclusion of IP Version 6 (ipv6)

  • From: Iljitsch van Beijnum
  • Date: Fri Sep 28 18:12:33 2007

On 28-sep-2007, at 22:57, Alain Durand wrote:

Tunneling is great, but it requires to allocate an IPv4 address... that I
may not have in the first place.

If an IPv6-only box is going to talk to the IPv4 world, at some point, the traffic needs to hit a dual stack system that can do the IPv6/IPv4 translation.

I think an approach where you have a regular IPv4 NAT and then tunnel the RFC 1918 addresses over an IPv6-only network would work better than NAT-PT.

If the tunnel provisioning system is flexible enough, it could even give unNATed IPv4 addresses to (just) the hosts that need them, possibly only temporarily.