Track Interface with 26.1

[mrt12]

Good day,
so I already switched in the past away from ISC DHCPD to Kea. It seemed to work fine so far, besides the fact that Kea cannot register DHCPv4 leases in DNS. But I can live with that, I generated static entries for the most important things, so its not a huge thing.

So today I just upgraded to 26.1 and also it still seems to work fine. However, I understand from the release notes, that "Track Interface" is something that is legacy and should not be used anymore. Also in the config page of my LAN interface it reads "Track interface (legacy)". So I tried to switch to "Identity Association" which, apparently, seems to be the new thing.
However, it gives me always the error:

Code Select Expand

The DHCPv6 Server is active on this interface and it can be used only with a static IPv6 configuration. Please disable the DHCPv6 Server service on this interface first, then change the interface configuration.
I am confused, because under "Services", "Kea DHCPv6" it is disabled. Furthermore, I have uninstalled the ISC-DHCP Plugin, so to my understanding, the DHCPv6 server should not be running at all.

I think I would need this Identity Association, as I needed previously "Track Interface". This is because my ISP gives me a /56 IPv6 Prefix, and I want several subnets of it to be delegated to my different VLANs. So What do I need to change to achieve the same behaviour as before? is is it not even possible anymore?
Note that I don't use dnsmasq, I try the KEA route, as I have already configured it so far to my liking, so if possible, I will prefer not to switch. Also I would prefer not to go back to ISC, as I understand, this is end-of-life, so I don't want to use it anymore.
Also note that the IPs handed out by my ISP are technically not fixed ones. I have dynamic IPs, even though I notice that my IP has not changed since more than 2 years, but technically, I think it can any time, so for this reason my setup needs to be compatible with that and also the delegated prefixes.

[franco]

Should be this one:

# opnsense-patch https://github.com/opnsense/core/commit/c264c905


Cheers,
Franco

PS: you are right about the rest