Implementaciones:
ftp://ftp.kame.net/pub/kame/misc/
http://ftp2.v6.linux.or.jp/pub/Linux/IPv6-2/apache/
http://www.hitachi.co.jp/Prod/comp/network/pexv6-e.htm
http://www.trumpet.com/winsock/ http://playground.sun.com/pub/ipng/html/ipng-implementations.html