Thanks, Darren. Your response is really helpful!
Too bad Kea doesn't have an option to tell it not to record the lease for reserved hosts. That would be ideal. The clients are RHEL8 using NetworkManager, and there's no simple way to release a DHCP lease from that at this point in time. I'll look into the API option - it sounds like that is the solution. Jason. ________________________________ From: Kea-users <kea-users-boun...@lists.isc.org> on behalf of Darren Ankney <darren.ank...@gmail.com> Sent: Thursday, March 7, 2024 5:45 AM To: Kea user's list <kea-users@lists.isc.org> Subject: Re: [Kea-users] dhcp lease question Hi Jason, This has come up before. The short answer is that ISC DHCP did not record a lease for addresses reserved with "fixed-address". Kea does record a lease, and so won't allow assignment to a new client until the lease is expired. You could send a release from the old computer before shutting it down, that should end the lease and make available to the new. You could also use the "lease4-del" API command (https://kea.readthedocs.io/en/kea-2.4.1/arm/hooks.html#the-lease4-del-lease6-del-commands) to remove the lease which would also make it available to the new client. Thank you, Darren Ankney On Wed, Mar 6, 2024 at 5:44 PM Jason Keltz <j...@yorku.ca> wrote: > > Hi. > > I have one question with respect to leases with Kea. > > On a subnet, I have assigned a static IP address for each ethernet address. > It works great. Recently, we started replacing the computers in one of our > labs. The new computers will be replacing existing computers, so they will > take on the same names. Before we install a new machine, we turn off the > old machine, reconfigure the ether address for the host in kea, and have kea > re-read it's config file. > > When the new system comes up, Kea doesn't want to give it the ether address > that is reserved for it because it sees a conflict. Of course the IP is > already issued to the old computer (that is now off). > > Is there an option to tell Kea to be "less particular" about leases for > reservations? That is, if the config file says that ether address X gets IP > address Y, then ether address X is always going to get IP address Y whether > the lease database says that it's in use or not. Obviously we aren't going > to have the old and new computer up at the same time. > > Is this possible? > > We did these kind of upgrades all the time with ISC DHCPd, and this was never > an issue, so hopefully it's just an option that I'm missing. > > Jason. > > > > -- > 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 mailing list > Kea-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/kea-users -- 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 mailing list Kea-users@lists.isc.org https://lists.isc.org/mailman/listinfo/kea-users
-- 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 mailing list Kea-users@lists.isc.org https://lists.isc.org/mailman/listinfo/kea-users
