[Kea-users] IP reservation for multiple MAC addresses

Marcin Romanowski marcin at nicram.net
Tue Sep 1 18:11:21 UTC 2020


wt., 1 wrz 2020 o 20:02 Robin Daermann <robin.daermann at ruhr-uni-bochum.de>
napisał(a):

> 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": "172.16.1.13"
>              },
>              {
>                 "hw-address": "00:15:e9:7c:56:8f",
>                 "ip-address": "172.16.1.13"
>              },
>
> 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 172.16.1.13: There's already a reservation for this
> address
>
> That was/is possible in the ISC DHCPD.
>


Do you think that is correct? There shouldn't be / it can't be two the same
ip address in the same network, this is ip conflicts and L3 wont work
correctly.

Opposite situation where you share the same mac but with different ip could
be considered as correct.




>
> 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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-- 
Marcin Romanowski / nicraM
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