Hi, I have used this http://wiki.centos.org/HowTos/Xen/Xen4QuickStart and everything works like a charm then I installed a VM using http://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt only to realize later that I don't want NAT. I would want to use PCI passthrough and so i used virsh net-destroy default virsh net-undefine default and net-create /home/kartik/passthrough.xml net-autostart passthrough net-start passthrough here is the output of /etc/libvirt/qemu/networks/passthrough.xml <!-- WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE OVERWRITTEN AND LOST. Changes to this xml configuration should be made using: virsh net-edit passthrough or other application using the libvirt API. --> <network> <name>passthrough</name> <uuid>d947fa14-af51-c615-279c-5d56ced04e44</uuid> <forward mode='hostdev' managed='yes'> <pf dev='eth0'/> </forward> </network> Is my approach right? After this I tried to restart using s shutdown -r now( but the machine is not rebooting) Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # virsh # virsh # list --all error: Failed to reconnect to the hypervisor error: no valid connection error: unable to connect to 'localhost:8000': Connection refused Can anyone help? Regards kartik -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20130809/3f1ce7e8/attachment-0003.html>