I have thought a lot about this and generally it works out bad no matter
how you slice it. Well, if I was writing the network kernel, I would
incorporate Teredo so that all interfaces presented an IPv6 address at
all times and if it had a 'native' IPv6 would not use Teredo. Basically
tying Teredo right into the interface handling?
We have probably all thought long and hard about this. Multiple
interfaces, most of them mobile. They are suppose to be changing their
priority based on something or other (IEEE 802.21?) IPv6 should be IPv6
publicly routable. But IPv4 will change from public, to good NAT, to
bad NAT, and bounce around. Because of this bad mix of reality we go to
the lowest common denominator and do everything as if there is a bad NAT
in the way. We have no effective method of intelligently switching.
HIP everywhere does not fix bad NATs.
Networking reality basically xxxxx, well I do try and control my
language in public.
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