Re: [v4v6interim] "IPv4->IPv6 is hard"

[catching up...]

On 1 okt 2008, at 18:13, Fred Baker wrote:

> An IPv4 client accessing an IPv6 server is equally simple given a  
> 1:1 mapping such as NAT64 or IVI describes. One maps the headers and  
> the addresses.

[...]

> So to my mind, the requirement is that the gateway provide three  
> services:
>  - a DNS algorithm that maps IPv4 addresses to a subset of IPv6
>    addresses.
>  - a 1:1 NAT algorithm that statelessly supports the common case of
>    IPv4 clients accessing IPv6 servers, which will be used by a
>    relatively small set of hosts in the IPv6-only domain.
>  - 1 1:n NAT algorithm that statefully maps general IPv6 to IPv4
>    address plus port, which might be used by an arbitrarily large
>    number of hosts in the IPv6-only domain, but unlikely to be all
>    at the same time and diminishing as IPv6 deployment grows.

So you _don't_ want to solve the situation where an IPv4-only host  
gets to talk to any given IPv6 host.

I think it would be fair to call _that_ scenario "hard".

However, I think there are others who are interested in solving this  
case.
_______________________________________________
v4v6interim mailing list
v4v6interim@ietf.org
https://www.ietf.org/mailman/listinfo/v4v6interim