BIOS——>config——>CPU——> Intel(R) Virtualization Technology (Enabled) Intel(R) VT-d Feature (Enabled)
sudo apt-get install kvm qemu
sudo apt-get install virtinst python-libvirt virt-viewer virt-manager
vim ovsnet.xml
<network>
<name>ovs-br0</name>
<forward mode='bridge'/>
<bridge name='br0' />
<virtualport type='openvswitch' />
</network>
sudo virsh net-destroy default
sudo virsh net-create ovsnet.xml