Dan,

> Dan Lanciani wrote:
> So your position is that I must do one of those two rather
> than using site-local addresses on the one segment along
> with the two globals? I believe that this restriction
> renders site-locals useless for many applications.
> I would be forced to opt for NAT.

You don't have NAT and you are not going to write yourself. Forget it.

>> I don't see what your problem is with 1, because the
>> smallest you can get is a /64 anyway, which is enough
>> for more printers and workstations than you will ever have. 

> There seems to be a persistent notion that ISPs are going to
> change their business models just because the IP header
> version field increases by 2. I don't buy it. Show me proof.

The IID is 64 bits, please read the addressing architecture draft. Same
as a v4 ISP could not give you less than ONE IPv4 address, a v6 ISP can
not give you less than ONE /64.


> If you ban packets with global addresses from your
> site-local subnet then the site-local machines
> (obviously) can't talk to globally-connected machines
> via their global addresses.  In my example, this makes
> #2 impossible.

Sorry, I misread you. There is no such restriction.


> There's no restriction on having site-locals and globals
> on one subnet either, but we seem to be talking about
> adopting one or more of these restrictions.

That is called political compromise. However, I am glad you contributed
your feelings, and I would stick to what I wrote in my original answer
about this: If it's only me, ok to scrap it. If some other people do
insist on having this feature, keep it.

> I cannot support your position.  This restricted version of
> site-locals may have some marginal security benefit, but it
> fails to deliver on the original promise of flexible scoping.
> It will just cause confusion for administrators who will
> think they can control their address allocations... until
> they actually try to do it.

Okay, I tried, no cigar. I actually think exactly as you do, so let's
stick to site-locals as we both want them. No restriction other than
what Bob Hinden mentioned yesterday.

Michel.


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