A SHORT DISCUSSION ON IPv6
                    TUNNELING WITH 6to4.


6to4 is the IPv6-in-IPv4 tunnelling method that encapsulates IPv6 packets in
IPv4 packets destined for a one of the global 6to4 converters.  It uses the
IPv6 prefix of 2002::/16 and encodes your IPv4 address in the next 2 16bit
fields, so if your IPv4 address was 1.2.3.4, your IPv6 subnet would be
2002:0102:0304::/80.