zone e51-3.tg16.gathering.org { primary 127.0.0.1; key DHCP_UPDATER; } subnet6 2a06:5840:20b::/64 { option domain-name "e51-3.tg16.gathering.org"; range6 2a06:5840:20b::1000 2a06:5840:20b::9999; }