[Kea-users] Problems moving from ISC-DHCP to Kea

[Francis Dupont]

Mike Lieberman writes:
> I have been using ISC-DHCP for years. I am a complete novice with Kea.
>
> I installed Kea 3.0.0 in a Debian 12 server. I migrated my large
> dhcp.conf via the ISC migration tool (successfully) and install the
> kea-dhcp4.conf file in the /etc/kea folder.
>
> I did run kea-admin -n with kea-dhcp4.conf and it took it. Testing
> showed that the service was live via dhcpdump.=C2=A0
>
> But the kea server is not serving up the reservation IP addresses that
> were migrated.

=> reservations are very different between ISC DHCP and Kea:
 - ISC DHCP reservations are not attached to a particular subnet (the subnet
  is found using the address when it exists)
 - Kea reservations are per subnet
Two additional details:
 - Kea has "global" reservations but they should not have an address even
  recent Kea versions try to find the corresponding subnet
 - an address can belongs to more than one subnet in Kea
The result is the translation tool can't handle corner cases with
reservations...

Regards

Francis Dupont <fdupont at isc.org>