[Kea-users] IP reservation for multiple MAC addresses

Robin Daermann robin.daermann at ruhr-uni-bochum.de
Tue Sep 1 18:02:00 UTC 2020

Dear all,

I would like to make host reservations for multiple MAC addresses that share a single IP(v4) address, for example:

                "hw-address": "00:15:e9:7c:56:8e",
                "ip-address": ""
                "hw-address": "00:15:e9:7c:56:8f",
                "ip-address": ""

Unfortunately, this is not possible. I get the following message:

   DHCP4_CONFIG_LOAD_FAIL configuration error using file: /usr/local/etc/kea/kea-dhcp4.conf, reason: failed to add new host using the HW address '00:15:e9:7c:56:8f and DUID '(null)' to the IPv4 subnet id '3' for the address There's already a reservation for this address

That was/is possible in the ISC DHCPD.

Is there a specific reason for that behaviour? And can I change it in any way? Or is my config simply wrong?

Kind regards,

Robin Därmann
(Network Operation Center RUB)

| Robin Därmann                             Network Operation Center |
| RS18625-RIPE                              Ruhr-Universitaet Bochum |
| You always meet twice in a lifetime...                             |
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