Hi I find this mail address from the internet and hope I can get the reply from anyone of you, that will be very appreciated. I'm using virsh to manage the KVM(qemu-kvm 0.12.4, libvirt 0.8.1), but I encounter an error as below: <img src=cid:_1_0761FB4C0761F67800331FB448257752> I saw both libvirt api and virsh commands support to get the physical interfaces data, but it always fail when I using them for KVM hypervisor. I was thought that it was due to the old version of libvirt/KVM hypervisor, but the error still exist when using the latest libvirt and kvm hypervisor. So I wonder if the following functions of libvirt haven't been implemented for KVM, could you pls help me get the answer about this? Thanks in advance! <a href="http://www.libvirt.org/html/libvirt-libvirt.html#virConnectListInterfaces"><tt>virConnectListInterfaces</tt></a> <a href="http://www.libvirt.org/html/libvirt-libvirt.html#virConnectNumOfDefinedInterfaces"><tt>virConnectNumOfDefinedInterfaces</tt></a> <a href="http://www.libvirt.org/html/libvirt-libvirt.html#virConnectNumOfInterfaces"><tt>virConnectNumOfInterfaces</tt></a> <a href="http://www.libvirt.org/html/libvirt-libvirt.html#virConnectListDefinedInterfaces"><tt>virConnectListDefinedInterfaces</tt></a> <a href="http://www.libvirt.org/html/libvirt-libvirt.html#virInterfaceLookupByName"><tt>virInterfaceLookupByName</tt></a> Best Regards, Fengdan Liu Tivoli ITCAM Solution, IBM China Software Development Lab, Tel: 13811762746 Email: liufengd@cn.ibm.com 3/F, Haohai Bldg., No.7, 5th Street, Shangdi, Haidian District, Beijing 100085, P.R.China