Ok in fact I founded why this was not working. I deleted and recreated my VM but there still was an entry corresponding to the old one in /var/lib/libvirt/dnsmasq/default.hostsfile. So I modified the MAC address and now it is working like a charm (after using HUP signal).
-- libvirt can't add host definitions to DHCP without network restart https://bugs.launchpad.net/bugs/584910 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libvirt in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
