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Re: [RRG] loc/id split and LISP
On 2007-10-09 17:24, Dino Farinacci wrote:
Agree. The deploying cost of IPv6 is quite expensive. I started to
IPv6 and IPv6 transition since 2001. By that time, we optimistically
IPv6 could replace IPv4 in 2 or 3 years giving its maturity of basic
protocols and massive advantages. Now, I have to say that we
the deploying cost, a lot. One more thing to be mentioned, IPv6
lot transition approaches to support IPv4/IPv6 coexist. So far, I have
seen such efforts in HIP or Node ID. (I may volunteer to do so.) And in
order to obtain the biggest benefit of HIP or Node ID, globally
is requested. Therefore, transition solutions may not solve the problems.
One could consider doing a combination of adding a new namespace and
deploying IPv6. If the cost of deployment is too great for putting IPv6
on hosts, then use IPv4 in hosts as the EID namespace and IPv6 deployed
in the core as the locator namespace.
If it is easier or more necessary to run IPv6 in the hosts, then the
opposite could occur. In fact this later case is probably more necessary
so we can have a larger address space that addresses all the hosts in
the Internet with IPv6 EIDs and use locators as IPv4 addresses with an
IPv4-only core substrate.
I took a while to think this through, but I think the answer is that
we should have a solution that is capable of doing *both* of these
Further, with all these different shapes and forms of identifier
and locator in the picture, I think they are going to need
to be tagged, so that the mapping and routing systems know what
they are. You can't just send a 32 bit or 128 bit value and expect
the receiving router to know by context what it is (in terms of
its scope of validity). If you try to map an apple into a pear,
you need to know that explicitly.
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