IPv6 DHCP-PD: how do I set sla-len?

[stblassitude]

I have successfully configured DHCPv6-PD, but my LAN interface is getting the full /56 from the PD, instead of breaking it down into multiple /64 for multiple LAN interfaces.

In a different FreeBSD-based install, I have this dhcp6c.conf:

Code: [Select]

interface em1 {
        send    ia-na   1;
        send    ia-pd   1;
        send    rapid-commit;
        script  "/root/bin/dhcp6cupdate";
};

id-assoc pd 1 {
        prefix ::/56 3600;
        prefix-interface br100 {
                sla-len 8; # break down /56 into /64
                sla-id 0;
        };
};

id-assoc na 1 {
};

The OpnSense generated dhcp6c.conf looks like this:

Code: [Select]

interface vlan02 {
  send ia-na 5; # request stateful address
  send ia-pd 5; # request prefix delegation
  request domain-name-servers;
  request domain-name;
  script "/var/etc/dhcp6c_opt3_script.sh"; # we'd like some nameservers please
};
id-assoc na 5 { };
id-assoc pd 5 {
  prefix ::/64 infinity;
  prefix-interface vlan0.2774 {
    sla-id 0;
    sla-len 0;
  };
};

I can't seem to find any info on how to adjust sla-len.

[stblassitude]

So went to look a bit more, and suddently sla-len is set to 8, and I'm getting the appriopriate /64 on the LAN interface. Very weird.

I think a bit more documentation on the settings would be really helpful...