[Kea-users] Expire single IP

[Darren Ankney]

Hi Ronald,

Have a look at the flex_id hook
(https://kea.readthedocs.io/en/kea-3.0.1/arm/hooks.html#libdhcp-flex-id-so-flexible-identifier-for-host-reservations).
You can combine this with the replace-client-id flag
(https://kea.readthedocs.io/en/kea-3.0.1/arm/hooks.html#the-replace-client-id-flag)
so that the lease is recorded by option 82 as well (i.e., the
client-id in the lease is replaced with the option82 hex).  In this
way, Kea will effectively be unaware that the client has changed.

Thank you,
Darren Ankney

On Wed, Sep 3, 2025 at 9:16 AM DDFR | Ronald Blaas <ronald.blaas at ddfr.nl> wrote:
>
> Hi all
>
> I was wondering if we could expire a single ip address after 1 hour (or maybe less)
>
>
> The reason for this is we have a port on which we connect different devices but the same IP address (is assigned via Option82)
>
> With the IP address in the database it is locked so the second device gets an IP from the pool.
>
>
> Ofcourse we can release the IP but I was wondering if this can be automated so the the IP is Expired sooner
>
>
> Kind regard,
>
>
> Ronald
>
>
> --
> ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information.
>
> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
> Kea-users at lists.isc.org