On 12/11/2015 06:04 AM, Günther J. Niederwimmer wrote: > I have 4 NIC on all my KVM Servers but the most time on a start (restart) I > lost one NIC? It is not always the same, but this two are virtio NICs. > > with ifup eth0(1) the system say,I have no configured eth0 or eth1 file ? You haven't given us much to go on. The output of these commands might be helpful: lspci "ip addr show" or "ifconfig -a" dmesg | grep -i eth ls -l /etc/sysconfig/network/ifcfg-eth* cat /etc/sysconfig/network/ifcfg-eth*