[Kea-users] reservation for the same host in several subnets

[Darren Ankney]

Hi Marek,

There should be one DUID per client and one IAID per interface.  See
here: https://www.rfc-editor.org/rfc/rfc8415#section-4.2

Thank you,
Darren Ankney

On Fri, Aug 23, 2024 at 1:20 AM Marek Greško via Kea-users
<kea-users at lists.isc.org> wrote:
>
> Hello,
>
> is it a limitation of kea or of the dhcp6 protocol? What is IAID then for? The IAIDs are different.
>
> If I add hwaddress as a key, I suspect it is not real harware address but rather some hw-address part from the DUID so it is the same for all interfaces. Am I right?
>
> So it seems I will have to create new vlan with the same purpose. What I would like to achieve is to have the host to be able to connect using either the cable or wifi. Both have the reservation (different ipv6 address).
>
> Thanks
>
> Marek
>
>
>
>
> Sent with Proton Mail secure email.
>
> On Friday, August 23rd, 2024 at 2:29, Darren Ankney <darren.ankney at gmail.com> wrote:
>
> > Hi Marek,
> >
> > I do not think you are going to be able to have two reservations for
> > the same DUID in the same subnet or shared-network. You might be able
> > to set one for DUID and the other for hw-address if that is available
> > to Kea, however.
> >
> > Thank you,
> > Darren Ankney
> >
> > On Thu, Aug 22, 2024 at 8:22 AM Marek Greško via Kea-users
> > kea-users at lists.isc.org wrote:
> >
> > > Hello,
> > >
> > > sorry, probably different problem here:
> > >
> > > I just realized, in the second vlan I have another definition for different interface of the host (same DUID, but different IAID). Probably the conflict it this one.
> > >
> > > Is it possible to have these two enrties? I would need it.
> > >
> > > Thanks
> > >
> > > Marek
> > >
> > > On Thursday, August 22nd, 2024 at 14:17, Marek Greško via Kea-users kea-users at lists.isc.org wrote:
> > >
> > > Hello,
> > >
> > > I am running a kea-2.6.1 server. I want one of the hosts to be roaming, i. e. to be able to connect by the network cable to two different vlans by selecting the plug.
> > >
> > > I am able to setup it for ipv4, but for ipv6 I get error: failed to add new host using the D
> > > UID ...... to the IPv6 subnet id <my id> as this host has already been added. The DUID and IAID is the same as for the same host in different subnet.
> > >
> > > I tried to set "early-global-reservations-lookup": false, but it had not help much.
> > >
> > > How can I achieve this goal? I would expect reservations table are independent for different subnets.
> > >
> > > Thanks
> > >
> > > Marek
> > >
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