+ struct rte_eth_rxconf default_rxconf; /**< Default RxQ conf. */
+ struct rte_eth_txconf default_txconf; /**< Default TxQ conf. */
+ struct rte_eth_desc_lim rx_desc_lim; /**< Rx descriptor limits */
+ struct rte_eth_desc_lim tx_desc_lim; /**< Tx descriptor limits */
+