Date: Fri, 21 Jun 2002 11:22:27 -0400
From: Keith Moore <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
I think this discussion is mostly over (for now), so I will respond
to just one point in your message, and leave the rest for
perhaps some other time...
| okay. but there's a fairly fundamental conflict here between this
| use of LL (in a network that will never be connected to the internet)
| and the use of LL on a network that is only temporarily disconnected
| from the internet. apps need to know which kind of address to use.
Hmm - I think apps (&/or the system, or something) need to be able to
do something here (if they're the kind that survive long enough for
changes to occur). Things like MTAs, DNS servers, ... all do already
(or do if they're worth using).
That is, it is entirely likely that a node will power up with no net
connected (hence no global addresses - v4 or v6), and apps will
start running. Later it connects to a net, and globals appear.
Later still, the net goes away again, and the globals expire.
When the net comes back again, the global addresses that reappear
may be the same as before, or they might be different.
All this happens all the time - as things are now (regardless of whether
scoped addresses exist or not).
Apart from simply refusing to work if a global addr isn't available
(as distinct from being able to contact some remote site, which is
kind of inevitable) apps really need to be able to deal with things
like this.
Like it or not, the world has changed in the past 20 years - your
typical internet node is no longer a half ton (or more) beast that
runs forever, and never turns off or gets disconnected. Apps, and
app designers just have to adapt - regardless if this means doing
more work.
kre
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