Lately I did a huge amount of IPv6-Setups and I noticed something in the vCenter: All the Boxes with static IP’s still had 2 IPv6-Adresses (one static and one per RA-Feature).

Since I didn’t want them to use the address that they got from the RA and disabling RA at the Router was not an option I googled a bit and found this:

netsh interface ipv6 set interface "Local Area Connection" routerdiscovery=disabled
netsh interface ipv6 set teredo disabled
netsh interface ipv6 isatap set state disabled
netsh interface ipv6 6to4 set state disabled

Tadaa – only my static IP is left 😉
Maybe this does not impact anything – but still it feels wrong to me that a static IPv6 Host gains a second address from the same subnet…

Maybe this will help you on your way to IPv6 – if so please leave a comment

On Linux you would simply put this into your /etc/sysconfig/network (for RHEL/CentOS):

IPV6_AUTOCONF=no