How to advertise ULAs as well as GUAs?

[mope]

I want each of my IPv6 subnets in OPNsense to have a GUA subnet configured and ULA. GUA is working fine, but I can't find where to configure ULAs.

I've just moved over from pfSense and in there I added the ULA subnet in Services -> DHCPv6 Server and RA -> LAN -> Router Advertisements and then the Subnets section.

I can't seem to find that in OPNsense. Anyone know?

[tiermutter]

You need to configure the ULA as virtual IP, then ULA can be distributed by DHCP6.
See https://forum.opnsense.org/index.php?topic=30670.msg147917#msg147917

[mope]

Thanks but I'm not using DHCPv6, only SLAAC. Any way to do it with SLAAC?

[tiermutter]

Sorry, I meant RA / SLAAC, not DHCP6...

1. Create virtual IP
2. Activate "allow manual configuration" for local subnets
3. Configure RA (Services > RA) for each subnet (I am using assisted mode)
ULA should now be distributed by RA.

[mope]

Thanks, all I had to do was add the virtual IP as a /64 without doing anything else and then it worked. Not intuitive but working fine