Re: Last Call: <draft-weil-shared-transition-space-request-03.txt> (IANA Reserved IPv4 Prefix for Shared Transition Space) to Informational RFC

[Keith Moore <moore@xxxxxxxxxxxxxxxxxxxx>]

On Sep 25, 2011, at 9:42 AM, John C Klensin wrote:

Remembering that an ISP who wants to avoid the use of public
IPv4 addresses on its backbone/infrastructure has the option of
simply converting that infrastructure to IPv6, tunneling
public-address IPv4 packets (both its own and those of its
customers) over that IPv6 infrastructure using a tunneling
approach of its choice. Longer-term, that approach makes the ISP
far more IPv6-ready, while "more private/shared IPv4 space" is
just another dead end.

Yes, but even if it does this (and I agree that it's a strategy well worth considering) that ISP is going to need IPv4 addresses to assign to its customers until the customers migrate to IPv6.  

Keith

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