NULL device is failed to attach ovs, reported operation not supported and configuration failed. To attach ovs: $VSCTL add-port ovs-br dpdk1 -- set Interface dpdk1 type=dpdk \ options:dpdk-devargs=eth_null0,size=64,copy=1 Signed-off-by: Mallesh Koujalagi <malleshx.koujalagi@intel.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>