> From: "Jeroen Massar" <[EMAIL PROTECTED]>
> Markku Savela [mailto:[EMAIL PROTECTED] wrote:
> > Despite claims of opposite, this combination works just fine.
>
> Example.com: fec0::/10
> Example.org: fec0::/10
>
> Good luck in tossing the bits around to routers in between those sites
> :)
That would happen only if both sites merged into single site. If sites
are just connected via global internet
example.com example.org
|
Site-A --| |
|---- INTERNET---|
|-- Site-B
If a host at example.com resolves xxx.example.org, it will not get
fec0::/10 address as reply. It will get some global address of site-B.
Yes, you need two-faced DNS, but again, this is standard practise
today. Banning sitelocals will not kill two-faced DNS.
However, a "merger", without global addresses and renumbering, would
look as
example.com example.org
|
Site-A --| |
|--GW---|
|-- Site-B
Now, if site-A and site-b previously used different prefixes, like
"fec0:site:aaaa" and "fec0:site:bbbb", then merger is trivial (GUPI,
anyone?)
However, if they used overlapping fec0:: prefixes, yes, simplest would
be to renumber one of the sites.
[Although, I could also make it work with overlapping addresses as is,
but it does require a revision to the way name resolving is done--I
have this implemented, but I would not expect everyone to do it. The
solution does get a bit too complex to explain here. The solution is
designed to handle multiple overlapping IPv4 private address spaces,
so IPv6 sitelocal would be a no-brainer for it :-].
> Not even speaking about when you have internal webservers:
>
> www.example.com fec0::1
> www.example.org fec0::1
Well, unless sites are truly merged, accessing "internal" servers from
another site is not supposed to happen anyway.
> What you need is a globally unique /48 that is disconnected
> and which one should be able to register 'cheaply'. Eg
> an annual fee of E20 or something just to make sure that
> not everybody starts harvesting them.
Why should I pay anything? I have a small net at home with few hosts,
but connected to the internet. I just pick some random address, for
example starting with "fec0:/10".. :-).
Big organisations do not need IPv6 at all. Their internal networks run
quite happily using IPv4 private address spaces. As I said earlier,
system admins wont allow globally routable addresses for the internal
nodes anyway.
IPv6 is needed by millions of private homes getting connected to the
internet and needing global addresses. And, it is needed by millions
of mobile phones that want to run E2E applications, which need global
addresses.
--------------------------------------------------------------------
IETF IPng Working Group Mailing List
IPng Home Page: http://playground.sun.com/ipng
FTP archive: ftp://playground.sun.com/pub/ipng
Direct all administrative requests to [EMAIL PROTECTED]
--------------------------------------------------------------------
