Thanks for the reply Matt. I created a Linux Container(container1) using lxc-tools. I created a Domain(container1_vm) using libvirt and want to mount that container file system in the created Domain. For that, I created following XML format: <domain type='lxc' id='1'> <name>container1_vm</name> <memory>500000</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/var/lib/lxc/container1/rootfs/rootfs'/> <target dir='/'/> </filesystem> <console type='pty' /> </devices> </domain> The above XML worked fine, and domain started. Now, I created a bridge br0 in the host machine with the IP 172.16.1.10. I want to assign an IP address[172.16.1.15] to the domain, so that the host machine and domain will ping each other. I tried to assign 'default' network to the domain by adding the following XML block to the above XML file: <interface type='network'> <source network='default'/> </interface> But, when I start the domain I got the following error in the virsh console: error: Failed to start domain vm1_fedora error: Failed to add veth0 device to virbr0: No such device Can you please let me know the XML format for assigning a statis IP address to the Domain? Regards, Srikanth. -----Original Message----- From: libvir-list-bounces@xxxxxxxxxx [mailto:libvir-list-bounces@xxxxxxxxxx] On Behalf Of Matthew Booth Sent: Wednesday, February 17, 2010 7:38 PM To: libvir-list@xxxxxxxxxx Subject: Re: [libvirt] libvirt XML format. On 17/02/10 12:36, Kumar L Srikanth-B22348 wrote: > Hi, Hi Kumar, > I have some doubts regarding libvirt XML format. > Can anyone please let me know in detail, what is /<source>/ and > /<target>/ tags in the libvirt XML format? The best documentation is available here: http://libvirt.org/formatdomain.html If that's not enough, could you post an example of what you're trying to do? Doesn't matter if it's wrong. > Can I put '/' in the /<target>/ tag or are there any exceptions if I > put '/' in that? The domain XML is a valid XML document. Syntactically, you can put / anywhere it would be valid in an XML document. Matt -- Matthew Booth, RHCA, RHCSS Red Hat Engineering, Virtualisation Team M: +44 (0)7977 267231 GPG ID: D33C3490 GPG FPR: 3733 612D 2D05 5458 8A8A 1600 3441 EA19 D33C 3490 -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list