All doc and the libvirt software itself is very insistent that dhcp4 will be supported on one and only one IPv4 subnetwork. Why is true? Certainly dnsmasq supports multiple dhcp-range definitions and the actual parameters passed to dnsmasq would be more or less the same! I can understand some restriction if there were systems libvirt suports which does not support the multi-dhcp per interface but not the blanket restriction. This, this is OK: ------------------------------------------------------ <ip address='172.16.6.1' prefix='16'> <dhcp> <range start='172.16.6.128' end='172.16.6.254' /> <range start='172.16.7.128' end='172.16.7.254' /> </dhcp> </ip> ------------------------------------------------------ but this is not: ------------------------------------------------------ <ip address='172.16.6.1' prefix='16'> <dhcp> <range start='172.16.6.128' end='172.16.6.254' /> <range start='172.16.7.128' end='172.16.7.254' /> </dhcp> </ip> <ip address='172.16.7.1' prefix='16'> <dhcp> <range start='172.16.7.128' end='172.16.7.254' /> </dhcp> </ip> ------------------------------------------------------ In both cases, the parameters passed to dnsmasq are: ---------------------------------------------------- dhcp-range=172.16.6.128,172.16.6.254 dhcp-range=172.16.7.128,172.16.7.254 ---------------------------------------------------- and, for dhcp, dnsmasq does not care about the specific addresses since it does its own filtering by listening on 0.0.0.0:67/68 Comments? Gene