Michael Kjorling wrote:

<SNIP>
> Speaking of 6to4... I got into a discussion with a guy in Australia
> who is setting up 6to4 on a bunch of systems (he has an IPv4 /24) and
> after a while I got to wonder... I seem to recall that the 6to4 IPv6
> prefix was created by taking 2002:, appending the IPv4 address of the
> router, and using that as a 48-bit prefix. However, now I find pages
> saying that it's the *host's* IPv4 address which is used - making both
> the SLA and Interface ID parts of the IPv6 address irrelevant.
> 
> Which is it...?
The host's IPv4 address.

Though you could use the routers IPv4 address too if you want too.
And use the /48 for the machines in the networks 'under' it.

http://www.kfu.com/~nsayer/6to4/ for 6to4 information
http://www.bieringer.de/linux/IPv6/index.html explains almost all linux
(and common ipv6 setup),
also those nice ping behaviours for our dear useruser :)

Greets,
 Jeroen

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