Thus spake "Roger Jorgensen" <[EMAIL PROTECTED]>
On Mon, 9 Jul 2007, Eliot Lear wrote:
At this point it is plain to see that ULA-C is nothing but PI
address space, because the IETF is in no position to enforce
otherwise. So please, let's just call it what it is.
it is NOT the same, there are several differences and some
of them are not technical but more manager/non-technical
ways of viewing things.
* PI are ment to be used on internet
No, PI is meant to be used anywhere IP is used. A large fraction of PI
space isn't routed on the Internet, and even in v4 there are several /8s
that are used privately.
* ULA-C/G are NOT ment to be used on internet
OTOH, there's no way for the IETF or RIRs to stop it from happening. I'm
not saying it will, but it is irresponsible to claim it won't when there's
no mechanism to enforce that.
* PI are the same as PA, there are NO real difference except
on how you get it and the size of the block, it is what Paul Dixie
have called UA (unique addresses), nothing else
PI vs PA merely depends on your perspective, i.e. whether you're the
original recipient from the RIR.
* ULA-C/G are something completly different, it is more like
RFC1918 space with some extra features,
- the size (amount of IPs)
This is a big disadvantage for ULA (of any flavor) space; you can get much
bigger PI (or even PA) prefixes than the fixed /48 of ULA.
- global unique so the current pain anyone with large network
have when they are interconnecting, merging due to fusions or
other reasons dont exist
That's no advantage over PI/PA space.
- anyone can, IF the ULA-C/G holder want to, resolve the IP in
any given ULA-C/G block through the global DNS system (a
very very nice thing for everyone that hate the pain split-DNS
give you...additional administration)
There's no consensus yet that ULA-C/G will appear in the global DNS. PI/PA
space definitely will.
and probably a few other things but the above are those I
consider most important.
If you start with the solution, one can always find problems that it solves.
However, if you start with a defined problem, the solution may not be what
you expect. Every example you've given so far is solved at least as well by
PI space as by ULA space, and in some cases better by PI.
S
Stephen Sprunk "Those people who think they know everything
CCIE #3723 are a great annoyance to those of us who do."
K5SSS --Isaac Asimov
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