salt -I 'nova:compute' alternatives.set ovs-vswitchd /usr/lib/openvswitch-switch-dpdk/ovs-vswitchd-dpdk
salt -I 'nova:compute' service.restart openvswitch-switch
salt -I 'nova:compute' alternatives.set ovs-vswitchd /usr/lib/openvswitch-switch-dpdk/ovs-vswitchd-dpdk
salt -I 'nova:compute' service.restart openvswitch-switch