Thanks for the input. Then, I suppose there's no way to assign the IP on boot without DHCP, there is? Can it be done without using <network> type elements? Regards, Francisco. <blockquote style="margin: 1.5em 0pt;"> </blockquote> <div class="gmail_quote">On Fri, Feb 20, 2009 at 19:52, Ulrich Dangel <<a href="mailto:uli@spamt.net">uli@spamt.net</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Friday 20 February 2009 13:54:20 Francisco José Martín wrote: Hi, <div class="Ih2E3d"> > We have tried several ways to assign a static ip address to the guest os > eth0 device on boot, but we didn't success. Is there any easy way to do it? </div>Yes. Create a network definition, specify a host element to the dhcp definition, attach the machine to the created bridge and it should work. <network> <name>sample</name> <forward dev='eth0' mode='nat'/> <bridge name='intbr0' stp='on' forwardDelay='0' /> <ip address='192.168.122.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.122.2' end='192.168.122.254' /> <host mac='AA:BB:CC:DD:EE:FF' ip='192.168.122.102'/> </dhcp> </ip> </network> Snippet for the domain definition: <interface type='bridge'> <mac address='AA:BB:CC:DD:EE:FF'/> <source bridge='intbr0'/> <target dev='vnet0'/> </interface> <div class="Ih2E3d"> > When the guest OS is booted, the eth0 device exists, but is not up, and > doesn't have the IP. </div>Is dnsmasq installed and running? Does the guest system use dhcp? Uli -- Libvir-list mailing list <a href="mailto:Libvir-list@redhat.com">Libvir-list@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/libvir-list" target="_blank">https://www.redhat.com/mailman/listinfo/libvir-list</a> </blockquote></div>