ovs 实验
ovs tunnel test:VxLAN:VM1:ifconfig eth0 192.168.2.12ovs-vsctl add-br br0ifconfig br0 10.1.1.2 upovs-vsctl add-port br0 vxlan0 -- set interface vxlan0 type=vxlan options:local_ip=192.168.2.12 options:remote_ip=192.168.2.13 option:key=5000iptab