Charlie Perkins wrote:
Maybe it could be done almost for free.
Maybe there could be a web page under the IANA web
page where a network administrator could get the "next"
site-local prefix. This would be rate-limited so that only
a few prefixes would be given out per second, and so on.
It seems like it would work, at least well-enough to be
given a try. It would not require very much administration
on the part of IANA (or whoever agreed to host the
web page).
I also thought about this. An automatic protocol to go get
a new site-local prefix... in my approach there was some kind
of a "key" however that the requesting entity had to provide.
This key could be a physical address, global IP address, MAC
address, or something like that. A new request from the same
"key" would give you back the same site-local prefix. This would
prevent a trivial depletion attack on the pool of prefixes. Yeah,
rate-limitation helps but I don't think it solves the problem.
But then I started to think about this in more detail. Remember
that our requirement was to be able to deal with disconnected sites.
I don't see how a disconnected site is going to the IANA web for
a prefix ;-) Or do we have to assume a human who helps the site
to get a prefix? In my opinion, that would prevent many useful
scenarios...
Jari
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