"Is there a reason you use DHCPv6 and SLAAC? Is it for compatibility? Can I use the DHCPv4 to give out DNSv6 addresses?" Unless you plan om having IPv6 only hosts, there is no advantage in providing IPv6 DNS servers. Just stay with IPv4 for your DNS resolver in the DHCPv4 config. Notice that your IPv4 DNs resolver is perfectly capable of providing AAAA IPv6 replies. Using DHCPv6 in a corporate environment makes it easier to track which machine has an IP address as you can lookup the info in the DHCP lease database. Also some prefers the nice short addresses that you get from DHCP compared to SLAAC. My network has both enabled, so my tablet has the following two addresses: SLAAC: 2a00:7660:5c6:0:74cd:d48c:8230:a44f DHCP: 2a00:7660:5c6::701 The later is easier to type if you have to add rules to your firewall etc. Regards Baldur