On 14 Mar 2011, at 23:30, Ask Bj?rn Hansen <ask at develooper.com> wrote: > Doesn't SLAAC give you automatic "MAC address to IP" mapping? It'll save you manually doing that (in an otherwise well controlled environment). No, it doesn't. On some systems, the mac address is used to create the ipv6 address, but not on others (e.g. windows 7). Nick