Steven M. Bellovin wrote:
[..]
> IPv6 isn't what I wanted it to be. During the IPng
directorate,
> several of us (including me and at least one of the
chairs) pushed very
> hard for id/locator split. We lost. That was 1994;
it's over and done
> with. But it took 13 years from then to a (mostly)
complete set of
> specs and universal implementation, at least in all
systems shipping
> today.
[..]
The good thing about the current state of IPv6 is though
that
applications have the following:
- 128bits source address
- 128bits destination address
and in many cases they are now also AF independent due to
getaddrinfo(),
though there will always be some dependent code in their
unfortunately.
Why is the above good? Well, the application doesn't further
really care
about how the packets are sent from source to destination.
As such those
bits are now identifiers already. The OS can change them and
do whatever
it wants with them, eg it could change them to something
which is
available only on the link, tell the other end to do the
same when it
receives them to make them identical when sent from the
source application.
This should provide for a pretty good outcome in a couple of
years where
next the second biggest "problem" of the current
Internet will be solved
(the first being 32bits not being enough to address all
hosts): too many
DFZ routes.
That will require a id/locator split, or IMHO better
mentioned using
those 128bits as both ID's and locators. It will need a
signaling
protocol for mentioning when something is an ID and when
something is a
locator and how to get back to an ID, but that magic should
not be too
hard to do and can be done both in the endhost and in middle
boxes.
As such, IPv6 has already solved the currently biggest
problem: there is
enough address space. Applications are mostly ready for this
and so are
Operating Systems. Now the web should follow, and while the
IPv6 DFZ
grows (it is still <900 routes) we will have enough time
to create the
ID/LOC system that ISP operators and Enterprise operators
will accept.
Especially that 'acceptance' is a big problem it seems and
that is mosly
a political issue, not a technical one.
Btw, ram iab.org if you want to join in on those discussions.
Greets,
Jeroen
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