Hi nazzareno taborgna, On 16 Jan 2026, at 9:17, nazzareno taborgna wrote: > Any help about this problem? this might be a JSON format issue. What is the output of kea-dhcp4 -t /etc/kea/kea-dhcp4.conf ? (adjust if your Kea configuration file is in a different place) Greetings Carsten