Instalujemy dhcp6:

pkg install dhcp6

Konfiguracja pod wlan(4):

Do /etc/rc.conf:

ifconfig_wlan0="WPA DHCP"
ifconfig_wlan0_ipv6="accept_rtadv up"
ifconfig_wlan0_alias0="inet6 no_dad"

rtsold_enable="YES"
rtsold_flags="-a -m"

dhcp6c_enable="YES"
dhcp6c_interfaces="wlan0"

Do /usr/local/etc/dhcp6c.conf:

interface wlan0 {
	send ia-na 0;
};

id-assoc na 0 {
};