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marcelo bagnulo wrote : > In the v6ops WG we are defining the requirements for next generation > v4 <-> v6 NATs. In my understanding, NAT64 has been found necessary for IPv4 transport connections via IPv6 (the "v4v6v4" case). As I explained during the v6ops meeting in Philadelphia, there exists a simpler alternative for v4v6v4. With it, the only NAT function is NAT44 (neither NAT64 nor NAT46 are needed). The NAT44 of router-CPEs only needs to be associated with some "address and Port borrowing protocol (APBP)" similar to that proposed in SHANTI (http://www.ietf.org/internet-drafts/draft-carpenter-shanti-01.txt). One issue that it is not clear to use (among many), > is what level of ICE support shoudl be required, or what type of > interaction between these boxes and ICE should be required. > any comments on this would be really helpful With this approach, everithing which works with NAT44, ICE in particular, works the same way with NAT44 + APBP. Also, ISP provided functions are more scalable. I work on an I-D describing it. It should be available soon. Regards Rémi |