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Re: IPv6 networking: Bad news for small biz

2012-04-08 09:41:35
On 4/7/12 13:43 , Randy Bush wrote:
Changing the message from "you don't need NAT anywhere" to "sure, you
can use RFC 4193 ULAs, just don't let us see them on the Internet"
would be a big help.

in ipv4, rfc1918 space was needed because of address scarcity.  in ipv6,
you could use global space inside a nat, if you need a nat.  we do not
need to perpetuate the 1918 mess.

you can also do it statelessly e.g. 1:1 because address expansion is
probably also not your  goal. That is unless your providers are morons
and you're stuck with a /128 /64 /60 or some other block that's rather
too small for the intended purpose.

in both the v4 and v6 cases expansion through address translation is
unilateral, it doesn't require coordination between the parties, even if
you have enough addresses, coordination is (still) expensive.

randy