Can an IPv6-only node communicate with an IPv4-only node (i.e., is there
any backwards compatibility built in)?
For example, if I were on an IPv6-only machine and I entered the command
ping 10.11.12.13
would a command syntax error be returned?
You can stop reading here if you like, but one of the things that prompted
the question is this:
I read an interview with itojun, and he said that he thinks people are
wasting their time using NAT (he says IPv6 is a simpler solution). But if
IPv6-only doesn't allow communication with IPv4-only and you have to run
dual-stack hosts/routers, then IPv6 does not solve the problem that NAT
was made to solve. You would have to run dual-stacks on all your machines
necessitating more than one globally unique IPv4 address, as opposed to
running NAT in which you only need one globally unique IPv4 address.
Thanks.
--------------------
Michael Costello
Bucknell University
570-577-4742
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