Have you looked at using multiple reservations for the same IP?  Would that
solve any of your issues?

https://kea.readthedocs.io/en/latest/arm/dhcp6-srv.html?highlight=unique#multiple-reservations-for-the-same-ip

--Dan


On Tue, Oct 18, 2022 at 1:15 PM Marek Greško via Kea-users <
kea-users@lists.isc.org> wrote:

> Hello,
>
> I am in a phase of migration ISC DHCPD into kea and I am suffering several
> problems in ipv6 address assignment.
>
>
>    1. I used to assign same ipv6 address for the same machine which was
>    dial boot linux/windows. It was possible by assigning same ipv6 address to
>    both DUIDs before. But in kea this is not allowed. I found out there is a
>    possibility to assign ipv6 address by MAC address which was not possible in
>    ISC DHCPD. I was very happy with that finding but fallen into second
>    problem.
>    2. The windows machine got 2 interfaces ethernet and wifi. I
>    configured kea to assign one ipv6 address to the ethernet adapter and
>    another one to the wifi adapter. But after investigating logs kea was
>    receiving dhcp6 request over wifi using the ethernet adapter mac address.
>    How is this possible? Is it possible the MAC address in DHCP does not match
>    L2 MAC address? I did not sniff the request, yet. I decided to switch back
>    to DUID assignment since this problem is worse than the previous.
>    3. Maybe it would be possible to overcome the above problems if kea is
>    able to match both DUID and MAC address, but it is not allowed in kea. I am
>    ought to select one option only. Why?
>
>
> Thanks
>
> Marek
>
>
> Thanks
>
> Marek
>
>
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