We are planning to upgrade our Active Directory 2008 R2 to 2012 R2.
We have two distant sites : one site with two Domain Controllers on the same local network and one site with only one Domain Controller, on an other local network.
The network configuration of the Domain Controllers 2008 R2 have IPv6 uncheked.
For now, the networks are only supporting IPv4 and it seems to be impossible (or difficult) to use IPv6 Global unicast addresses.
So the big question : as Microsoft is claiming that IPv6 must be enabled on the Domain Controller (to avoid breaking the UDP 389 LDAP communications), what is really the best practice for our 3 DC 2012 R2 ?
1. Put IPv6 cheked in the network configuration with an automatic assignation. This will result in a situation with 2 IPv6 addresses :
Fe80 : link local : usable only in the local network (ok for 2 of the 3 DC, which are on the same local network).
2002 : 6to4 : usable by the 3 DC
This « 6to4 address » is stored in the DNS Server.
2. Put IPv6 uncheked in the network configuration (just as with our 2008 R2 DC) but not disabling it (and not modifying registry configuration).
Thanks a lot for sharing your experience !