(Robin, I am using your headline as a hook for my comments. This topic
has been bouncing and I wanted to suggest another perspective on this.
It probably has very little to do with what you were trying to get at in
your note.)
IPv4 will clearly be around for a LONG time.
IPv4 will, I expect, continue to be used for a LOT of content for a LONG
time.
However, I am not sure that matters for the RRG work.
The IPv4 Internet works. The routers, and the routing system, cope with
the current pressures. To my way of looking at things, the question is
how will the Internet routing system cope with growth.
But, definitionally, there really is not that much growth left in IPv4.
On the other hand, although IPv6 is tiny now, unless the entire Internet
stops growing, v6 will become massive. If we do not work out an
architecture that can cope with growth, when that pass the current IPv4
size, and keeps growing faster, we will be up the proverbial creek
without any control whatsoever.
Hence, I think it is actually quite reasonable to have an architecture
and approach which only addresses IPv6 Internet Scaling. Without
denying that IPv4 will be here, and important, for a very, very, long time.
Yours,
Joel M. Halpern
Robin Whittle wrote:
...
IPv4 will be _central_ for a long time to come.
...
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