Don’t believe the Connect-Box that you only get a /64 from UPC. Normal prefix delegation is possible, you just have to guess/experiment how big your prefix is. Here is my dhcp6c.conf
interface vr0 {
send ia-pd 1;
send ia-na 1;
# send rapid-commit;
};
id-assoc na 1 {
};
id-assoc pd 1 {
prefix ::/56 1800;
prefix-interface vr1 {
sla-len 4;
};
};
My rtadvd.conf:
default:\
:prefixlen#64:\
Some excerpts from my rc.conf:
ipv6_activate_all_interfaces="YES"
ipv6_cpe_wanif="vr0"
ipv6_gateway_enable="YES"
rtadvd_enable="YES"
rtadvd_interfaces="vr1"