Re: WG last call on NAT-PT to Experimental

[Baker Fred <fred@cisco.com>]

On Mar 13, 2005, at 1:56 PM, Bound, Jim wrote:
> IPv6 dominant does not mean IPv4 does not exist but that IPv6 has been 
> on purpose chosen to be used and IPv4 is there on all nodes but not 
> being used on a specific network. IPv6 only and IPv6 dominant need 
> differentiation from us as a community. Thus the question is the edge 
> dual IP?

Of course.

The principal use of IPv4 in an otherwise IPv6 network is generally 
supporting applications that have not made the transition yet, I 
suspect.  I know of some networks (CNGI for example) that are proposing 
to use a combination of IPv4 and IPv6 within the backbone for various 
purposes, but only offer an IPv6 edge. You allude to a period in which 
companies have parts of their infrastructure addressed using IPv4 and 
parts not. While that is a possible scenario, I doubt its importance - 
that will be solved using IPv4 NAT.