[Kea-users] Kea 2.6.1 started issuing duplicate IPs after restart

[Don Lawrence]

Hello all,

We are looking to get budget approval for support and sales suggested posting to the user group while we wait.

We are running Kea 2.6.1 running memfile and Stork 1.19.0.

There was a config change on the renew-timer for a subnet to increase the time. The server was restarted with "systemctl restart kea-dhcp4".

Sometime after the restart, Kea started issuing DHCP addresses that were already taken and in the lease file. When looking at the subnet on Stork, the utilization data showed low or 0% utilization on a set of individual subnets under a specific shared network. We noticed it because the client asking for the IP had no connectivity and we could see two entries in the ARP table with different MAC addresses but the same IP.

I know the technical info is light on details. I am asking the group for any tips on troubleshooting or why the server would expire the whole subnet after a restart and start issuing duplicate IPs. I'm thinking a configuration problem but I'm not sure.

Thank you in advance.
Don
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/kea-users/attachments/20250516/7b22a8e8/attachment.htm>