pfSense

interface em0_vlan100 {

        send ia-na 0;   # request stateful address

	send ia-pd 0;	# request prefix delegation

	request domain-name-servers;

	request domain-name;

	script "/var/etc/dhcp6c_wan_script.sh"; # we'd like some nameservers please

};

id-assoc na 0 { };

id-assoc pd 0 {

	prefix ::/60 infinity;

	prefix-interface em0 {

		sla-id 0;

		sla-len 4;

	};

};