> 1) IPv4 compatable address i.e. ::a.b.c.d where
a.b.c.d is the v4
> address.
> 2) IPv4 mapped address i.e. ::FFFF:a.b.c.d.
>
Well, this two I have seen them used in NAT-PT (for
translating IPv4/IPv6 addresses in both ways)
applications, like the Click Router. They are useful
when you are in a IPv6 network and you need to
communicate with a IPv4 host via a NAT-PT, for
example:
3ffe:1ce1:200:2::2 (IPv6 Host)
|
|
|
3ffe:1ce1:200:2::1 (NAT-PT)
172.25.0.1
|
|
|
172.25.0.2 (IPv4 host)
For example, if the ipv6 host wnats to ping6 the
IPv4 host, it would ping6 ::172.25.0.2. Then the
NAT-PT would translate that destination address to
172.25.0.2 and send it to the IPv4 host. When the
packet goes back to the NAT-PT, the source address
gets translated again to ::172.25.0.2. So, as you
can see, for the IPv6 host when communicating with
that or any other IPv4 host is like communicating
with any other IPv6 host. With ::ffff prefix I think
is the same.
Cheers,
--
-------------------------------
Juan Luis Baptiste M.
Linux registered user #119248
http://www.merlinux.org
"we're back to the times
when men where men and
wrote their own drivers"
Linus Torvalds
-------------------------------
--
Get your free email from www.linuxmail.org
Powered by Outblaze
---------------------------------------------------------------------
The IPv6 Users Mailing List
Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
