any design for architecural change (e.g. introducing separation of location
and identity) is going to be somewhat
ugly, because we don't have a clean sheet of paper to work with.
Location independent identifiers can be introduced at the transport or
application layer, without having to change the network infrastructure. There
is nothing to prevent researchers or application developers to design a
"transport" that sits on top of IPv4/IPv6, or even on top of UDP, and manage
location independent identifiers. This is the classic "overlay" play, at the
end of which IPv6/IPv4 addresses, or address+port pairs, are redefined as mere
lcators.
Obviously, this only works for new applications, or new application releases.
But if application developers really believe they will benefit from the split,
they can do it.
-- Christian Huitema
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