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Title: How to advertise ULAs as well as GUAs?
Post by: mope on October 27, 2022, 12:10:14 PM

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?

Title: Re: How to advertise ULAs as well as GUAs?
Post by: tiermutter on October 27, 2022, 12:13:49 PM

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

Title: Re: How to advertise ULAs as well as GUAs?
Post by: mope on October 27, 2022, 12:20:43 PM

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

Title: Re: How to advertise ULAs as well as GUAs?
Post by: tiermutter on October 27, 2022, 12:46:51 PM

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.

Title: Re: How to advertise ULAs as well as GUAs?
Post by: mope on October 27, 2022, 01:05:14 PM

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 :)

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English Forums => General Discussion => Topic started by: mope on October 27, 2022, 12:10:14 PM