pfSense

This is not supported on FreeBSD yet. Lets track the progress of FreeBSD's open ticket and when it's available there we can work on it here.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210933

Hello,
this would also fix a problem on the PPPoE interface. My provider only supports DHCPv6-IA_PD and not DHCPv6-IA_NA or SLAAC.
On the LAN interface pfsense can generate an IPv6 address via EUI-64, but this does not work on the PPPoE interface since it has no MAC address / hwaddr as you can see via ifconfig.

This results in the following error:
[2.5.0-RELEASE][admin@pfSense.localdomain]/root: grep dhcp6c /var/log/dhcpd.log | tail -n3
Mar 3 16:37:36 pfSense dhcp6c⁵³⁴⁸³: link layer address is too short (pppoe0)
Mar 3 16:37:36 pfSense dhcp6c⁵³⁴⁸³: failed to get default IF ID for pppoe0
Mar 3 16:37:36 pfSense dhcp6c⁵³⁴⁸³: failed to parse configuration file

I used the following dhcp6c configuration:
[2.5.0-RELEASE][admin@pfSense.localdomain]/root: cat /var/etc/dhcp6c_wan.conf
interface pppoe0 {
send ia-pd 0;
request domain-name-servers;
request domain-name;
script "/var/etc/dhcp6c_wan_script.sh";
};
id-assoc pd 0 {
prefix-interface pppoe0 {
sla-id 0;
sla-len 16;
};
};

The IPv6 address on the PPPoE Interface is needed for Source NAT since we are using IPv6 ULAs on the LAN side and have two providers as uplink.

Kind regards,
Jost