diff --git a/app/test/test_pmd_ring.c b/app/test/test_pmd_ring.c
index a555db8..5568759 100644
--- a/app/test/test_pmd_ring.c
+++ b/app/test/test_pmd_ring.c
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -38,108 +38,104 @@
 #include <rte_ethdev.h>
 
 static struct rte_mempool *mp;
+static int tx_porta, rx_portb, rxtx_portc, rxtx_portd, rxtx_porte;
 
-#define TX_PORT 0
-#define RX_PORT 1
-#define RXTX_PORT 2
-#define RXTX_PORT2 3
-#define RXTX_PORT3 4
 #define SOCKET0 0
-
 #define RING_SIZE 256
+#define NUM_RINGS 2
+#define NB_MBUF 512
 
-#define NB_MBUF   512
 
 static int
-test_ethdev_configure(void)
+test_ethdev_configure_port(int port)
 {
 	struct rte_eth_conf null_conf;
 	struct rte_eth_link link;
 
 	memset(&null_conf, 0, sizeof(struct rte_eth_conf));
 
-	if ((TX_PORT >= RTE_MAX_ETHPORTS) || (RX_PORT >= RTE_MAX_ETHPORTS)\
-		|| (RXTX_PORT >= RTE_MAX_ETHPORTS)) {
-		printf(" TX/RX port exceed max eth ports\n");
-		return -1;
-	}
-	if (rte_eth_dev_configure(TX_PORT, 1, 2, &null_conf) < 0) {
-		printf("Configure failed for TX port\n");
+	if (rte_eth_dev_configure(port, 1, 2, &null_conf) < 0) {
+		printf("Configure failed for port %d\n", port);
 		return -1;
 	}
 
 	/* Test queue release */
-	if (rte_eth_dev_configure(TX_PORT, 1, 1, &null_conf) < 0) {
-		printf("Configure failed for TX port\n");
-		return -1;
-	}
-	if (rte_eth_dev_configure(RX_PORT, 1, 1, &null_conf) < 0) {
-		printf("Configure failed for RX port\n");
-		return -1;
-	}
-	if (rte_eth_dev_configure(RXTX_PORT, 1, 1, &null_conf) < 0) {
-		printf("Configure failed for RXTX port\n");
+	if (rte_eth_dev_configure(port, 1, 1, &null_conf) < 0) {
+		printf("Configure failed for port %d\n", port);
 		return -1;
 	}
 
-	if (rte_eth_tx_queue_setup(TX_PORT, 0, RING_SIZE, SOCKET0, NULL) < 0) {
-		printf("TX queue setup failed\n");
-		return -1;
-	}
-	if (rte_eth_rx_queue_setup(RX_PORT, 0, RING_SIZE, SOCKET0,
-			NULL, mp) < 0) {
-		printf("RX queue setup failed\n");
-		return -1;
-	}
-	if (rte_eth_tx_queue_setup(RXTX_PORT, 0, RING_SIZE, SOCKET0, NULL) < 0) {
-		printf("TX queue setup failed\n");
+	if (rte_eth_tx_queue_setup(port, 0, RING_SIZE, SOCKET0, NULL) < 0) {
+		printf("TX queue setup failed port %d\n", port);
 		return -1;
 	}
-	if (rte_eth_rx_queue_setup(RXTX_PORT, 0, RING_SIZE, SOCKET0,
+
+	if (rte_eth_rx_queue_setup(port, 0, RING_SIZE, SOCKET0,
 			NULL, mp) < 0) {
-		printf("RX queue setup failed\n");
+		printf("RX queue setup failed port %d\n", port);
 		return -1;
 	}
 
-	if (rte_eth_dev_start(TX_PORT) < 0) {
-		printf("Error starting TX port\n");
+	if (rte_eth_dev_start(port) < 0) {
+		printf("Error starting port %d\n", port);
 		return -1;
 	}
-	if (rte_eth_dev_start(RX_PORT) < 0) {
-		printf("Error starting RX port\n");
+
+	rte_eth_link_get(port, &link);
+
+	return 0;
+}
+
+static int
+test_send_basic_packets(void)
+{
+	struct rte_mbuf  bufs[RING_SIZE];
+	struct rte_mbuf *pbufs[RING_SIZE];
+	int i;
+
+	printf("Testing send and receive RING_SIZE/2 packets (tx_porta -> rx_portb)\n");
+
+	for (i = 0; i < RING_SIZE/2; i++)
+		pbufs[i] = &bufs[i];
+
+	if (rte_eth_tx_burst(tx_porta, 0, pbufs, RING_SIZE/2) < RING_SIZE/2) {
+		printf("Failed to transmit packet burst port %d\n", tx_porta);
 		return -1;
 	}
-	if (rte_eth_dev_start(RXTX_PORT) < 0) {
-		printf("Error starting RX port\n");
+
+	if (rte_eth_rx_burst(rx_portb, 0, pbufs, RING_SIZE) != RING_SIZE/2) {
+		printf("Failed to receive packet burst on port %d\n", rx_portb);
 		return -1;
 	}
 
-	rte_eth_link_get(TX_PORT, &link);
-	rte_eth_link_get(RX_PORT, &link);
-	rte_eth_link_get(RXTX_PORT, &link);
+	for (i = 0; i < RING_SIZE/2; i++)
+		if (pbufs[i] != &bufs[i]) {
+			printf("Error: received data does not match that transmitted\n");
+			return -1;
+		}
 
 	return 0;
 }
 
 static int
-test_send_basic_packets(void)
+test_send_basic_packets_port(int port)
 {
 	struct rte_mbuf  bufs[RING_SIZE];
 	struct rte_mbuf *pbufs[RING_SIZE];
 	int i;
 
-	printf("Testing ring pmd RX/TX\n");
+	printf("Testing send and receive RING_SIZE/2 packets (cmdl_port0 -> cmdl_port0)\n");
 
 	for (i = 0; i < RING_SIZE/2; i++)
 		pbufs[i] = &bufs[i];
 
-	if (rte_eth_tx_burst(TX_PORT, 0, pbufs, RING_SIZE/2) < RING_SIZE/2) {
-		printf("Failed to transmit packet burst\n");
+	if (rte_eth_tx_burst(port, 0, pbufs, RING_SIZE/2) < RING_SIZE/2) {
+		printf("Failed to transmit packet burst port %d\n", port);
 		return -1;
 	}
 
-	if (rte_eth_rx_burst(RX_PORT, 0, pbufs, RING_SIZE) != RING_SIZE/2) {
-		printf("Failed to receive packet burst\n");
+	if (rte_eth_rx_burst(port, 0, pbufs, RING_SIZE) != RING_SIZE/2) {
+		printf("Failed to receive packet burst on port %d\n", port);
 		return -1;
 	}
 
@@ -152,89 +148,92 @@ test_send_basic_packets(void)
 	return 0;
 }
 
+
 static int
-test_get_stats(void)
+test_get_stats(int port)
 {
 	struct rte_eth_stats stats;
 	struct rte_mbuf buf, *pbuf = &buf;
 
-	printf("Testing ring PMD stats\n");
+	printf("Testing ring PMD stats_get port %d\n", port);
 
 	/* check stats of RXTX port, should all be zero */
-	rte_eth_stats_get(RXTX_PORT, &stats);
+
+	rte_eth_stats_get(port, &stats);
 	if (stats.ipackets != 0 || stats.opackets != 0 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not zero\n");
+		printf("Error: port %d stats are not zero\n", port);
 		return -1;
 	}
 
 	/* send and receive 1 packet and check for stats update */
-	if (rte_eth_tx_burst(RXTX_PORT, 0, &pbuf, 1) != 1) {
-		printf("Error sending packet to RXTX port\n");
+	if (rte_eth_tx_burst(port, 0, &pbuf, 1) != 1) {
+		printf("Error sending packet to port %d\n", port);
 		return -1;
 	}
-	if (rte_eth_rx_burst(RXTX_PORT, 0, &pbuf, 1) != 1) {
-		printf("Error receiving packet from RXTX port\n");
+
+	if (rte_eth_rx_burst(port, 0, &pbuf, 1) != 1) {
+		printf("Error receiving packet from port %d\n", port);
 		return -1;
 	}
 
-	rte_eth_stats_get(RXTX_PORT, &stats);
+	rte_eth_stats_get(port, &stats);
 	if (stats.ipackets != 1 || stats.opackets != 1 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", port);
 		return -1;
 	}
 	return 0;
 }
 
 static int
-test_stats_reset(void)
+test_stats_reset(int port)
 {
 	struct rte_eth_stats stats;
 	struct rte_mbuf buf, *pbuf = &buf;
 
-	printf("Testing ring PMD stats reset\n");
+	printf("Testing ring PMD stats_reset port %d\n", port);
 
-	rte_eth_stats_reset(RXTX_PORT);
+	rte_eth_stats_reset(port);
 
 	/* check stats of RXTX port, should all be zero */
-	rte_eth_stats_get(RXTX_PORT, &stats);
+	rte_eth_stats_get(port, &stats);
 	if (stats.ipackets != 0 || stats.opackets != 0 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not zero\n");
+		printf("Error: port %d stats are not zero\n", port);
 		return -1;
 	}
 
 	/* send and receive 1 packet and check for stats update */
-	if (rte_eth_tx_burst(RXTX_PORT, 0, &pbuf, 1) != 1) {
-		printf("Error sending packet to RXTX port\n");
+	if (rte_eth_tx_burst(port, 0, &pbuf, 1) != 1) {
+		printf("Error sending packet to port %d\n", port);
 		return -1;
 	}
 
-	if (rte_eth_rx_burst(RXTX_PORT, 0, &pbuf, 1) != 1) {
-		printf("Error receiving packet from RXTX port\n");
+	if (rte_eth_rx_burst(port, 0, &pbuf, 1) != 1) {
+		printf("Error receiving packet from port %d\n", port);
 		return -1;
 	}
 
-	rte_eth_stats_get(RXTX_PORT, &stats);
+	rte_eth_stats_get(port, &stats);
 	if (stats.ipackets != 1 || stats.opackets != 1 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", port);
 		return -1;
 	}
 
-	rte_eth_stats_reset(RXTX_PORT);
+	rte_eth_stats_reset(port);
 
 	/* check stats of RXTX port, should all be zero */
-	rte_eth_stats_get(RXTX_PORT, &stats);
+	rte_eth_stats_get(port, &stats);
 	if (stats.ipackets != 0 || stats.opackets != 0 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not zero\n");
+		printf("Error: port %d stats are not zero\n", port);
 		return -1;
 	}
 
@@ -242,162 +241,182 @@ test_stats_reset(void)
 }
 
 static int
-test_pmd_ring_pair_create_attach(void)
+test_pmd_ring_pair_create_attach(int portd, int porte)
 {
 	struct rte_eth_stats stats, stats2;
 	struct rte_mbuf buf, *pbuf = &buf;
 	struct rte_eth_conf null_conf;
 
-	if ((RXTX_PORT2 >= RTE_MAX_ETHPORTS) || (RXTX_PORT3 >= RTE_MAX_ETHPORTS)) {
-		printf(" TX/RX port exceed max eth ports\n");
-		return -1;
-	}
-	if ((rte_eth_dev_configure(RXTX_PORT2, 1, 1, &null_conf) < 0)
-		|| (rte_eth_dev_configure(RXTX_PORT3, 1, 1, &null_conf) < 0)) {
-		printf("Configure failed for RXTX port\n");
+	if ((rte_eth_dev_configure(portd, 1, 1, &null_conf) < 0)
+		|| (rte_eth_dev_configure(porte, 1, 1, &null_conf) < 0)) {
+		printf("Configure failed for port\n");
 		return -1;
 	}
 
-	if ((rte_eth_tx_queue_setup(RXTX_PORT2, 0, RING_SIZE, SOCKET0, NULL) < 0)
-		|| (rte_eth_tx_queue_setup(RXTX_PORT3, 0, RING_SIZE, SOCKET0, NULL) < 0)) {
+	if ((rte_eth_tx_queue_setup(portd, 0, RING_SIZE, SOCKET0, NULL) < 0)
+		|| (rte_eth_tx_queue_setup(porte, 0, RING_SIZE, SOCKET0, NULL) < 0)) {
 		printf("TX queue setup failed\n");
 		return -1;
 	}
 
-	if ((rte_eth_rx_queue_setup(RXTX_PORT2, 0, RING_SIZE, SOCKET0, NULL, mp) < 0)
-		|| (rte_eth_rx_queue_setup(RXTX_PORT3, 0, RING_SIZE, SOCKET0, NULL, mp) < 0)) {
+	if ((rte_eth_rx_queue_setup(portd, 0, RING_SIZE, SOCKET0, NULL, mp) < 0)
+		|| (rte_eth_rx_queue_setup(porte, 0, RING_SIZE, SOCKET0, NULL, mp) < 0)) {
 		printf("RX queue setup failed\n");
 		return -1;
 	}
 
-	if ((rte_eth_dev_start(RXTX_PORT2) < 0)
-		|| (rte_eth_dev_start(RXTX_PORT3) < 0)) {
-		printf("Error starting RXTX port\n");
+	if ((rte_eth_dev_start(portd) < 0)
+		|| (rte_eth_dev_start(porte) < 0)) {
+		printf("Error starting port\n");
+		return -1;
+	}
+
+	rte_eth_stats_reset(portd);
+	/* check stats of port, should all be zero */
+	rte_eth_stats_get(portd, &stats);
+	if (stats.ipackets != 0 || stats.opackets != 0 ||
+			stats.ibytes != 0 || stats.obytes != 0 ||
+			stats.ierrors != 0 || stats.oerrors != 0) {
+		printf("Error: port %d stats are not zero\n", portd);
+		return -1;
+	}
+
+	rte_eth_stats_reset(porte);
+	/* check stats of port, should all be zero */
+	rte_eth_stats_get(porte, &stats2);
+	if (stats2.ipackets != 0 || stats2.opackets != 0 ||
+			stats2.ibytes != 0 || stats2.obytes != 0 ||
+			stats2.ierrors != 0 || stats2.oerrors != 0) {
+		printf("Error: port %d stats are not zero\n", porte);
 		return -1;
 	}
 
 	/*
-	 * send and receive 1 packet (RXTX_PORT2 -> RXTX_PORT3)
+	 * send and receive 1 packet (portd -> porte)
 	 * and check for stats update
 	 */
-	if (rte_eth_tx_burst(RXTX_PORT2, 0, &pbuf, 1) != 1) {
-		printf("Error sending packet to RXTX port\n");
+	printf("Testing send and receive 1 packet (portd -> porte)\n");
+	if (rte_eth_tx_burst(portd, 0, &pbuf, 1) != 1) {
+		printf("Error sending packet to port %d\n", portd);
 		return -1;
 	}
 
-	if (rte_eth_rx_burst(RXTX_PORT3, 0, &pbuf, 1) != 1) {
-		printf("Error receiving packet from RXTX port\n");
+	if (rte_eth_rx_burst(porte, 0, &pbuf, 1) != 1) {
+		printf("Error receiving packet from port %d\n", porte);
 		return -1;
 	}
 
-	rte_eth_stats_get(RXTX_PORT2, &stats);
-	rte_eth_stats_get(RXTX_PORT3, &stats2);
+	rte_eth_stats_get(portd, &stats);
+	rte_eth_stats_get(porte, &stats2);
 	if (stats.ipackets != 0 || stats.opackets != 1 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", portd);
 		return -1;
 	}
 
 	if (stats2.ipackets != 1 || stats2.opackets != 0 ||
 			stats2.ibytes != 0 || stats2.obytes != 0 ||
 			stats2.ierrors != 0 || stats2.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", porte);
 		return -1;
 	}
 
 	/*
-	 * send and receive 1 packet (RXTX_PORT3 -> RXTX_PORT2)
+	 * send and receive 1 packet (porte -> portd)
 	 * and check for stats update
 	 */
-	if (rte_eth_tx_burst(RXTX_PORT3, 0, &pbuf, 1) != 1) {
-		printf("Error sending packet to RXTX port\n");
+	printf("Testing send and receive 1 packet (porte -> portd)\n");
+	if (rte_eth_tx_burst(porte, 0, &pbuf, 1) != 1) {
+		printf("Error sending packet to port %d\n", porte);
 		return -1;
 	}
 
-	if (rte_eth_rx_burst(RXTX_PORT2, 0, &pbuf, 1) != 1) {
-		printf("Error receiving packet from RXTX port\n");
+	if (rte_eth_rx_burst(portd, 0, &pbuf, 1) != 1) {
+		printf("Error receiving packet from port %d\n", portd);
 		return -1;
 	}
 
-	rte_eth_stats_get(RXTX_PORT2, &stats);
-	rte_eth_stats_get(RXTX_PORT3, &stats2);
+	rte_eth_stats_get(portd, &stats);
+	rte_eth_stats_get(porte, &stats2);
 	if (stats.ipackets != 1 || stats.opackets != 1 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", portd);
 		return -1;
 	}
 
 	if (stats2.ipackets != 1 || stats2.opackets != 1 ||
 			stats2.ibytes != 0 || stats2.obytes != 0 ||
 			stats2.ierrors != 0 || stats2.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", porte);
 		return -1;
 	}
 
 	/*
-	 * send and receive 1 packet (RXTX_PORT2 -> RXTX_PORT2)
+	 * send and receive 1 packet (portd -> portd)
 	 * and check for stats update
 	 */
-	if (rte_eth_tx_burst(RXTX_PORT2, 0, &pbuf, 1) != 1) {
-		printf("Error sending packet to RXTX port\n");
+	printf("Testing send and receive 1 packet (portd -> portd)\n");
+	if (rte_eth_tx_burst(portd, 0, &pbuf, 1) != 1) {
+		printf("Error sending packet to port %d\n", portd);
 		return -1;
 	}
 
-	if (rte_eth_rx_burst(RXTX_PORT2, 0, &pbuf, 1) != 1) {
-		printf("Error receiving packet from RXTX port\n");
+	if (rte_eth_rx_burst(portd, 0, &pbuf, 1) != 1) {
+		printf("Error receiving packet from port %d\n", porte);
 		return -1;
 	}
 
-	rte_eth_stats_get(RXTX_PORT2, &stats);
-	rte_eth_stats_get(RXTX_PORT3, &stats2);
+	rte_eth_stats_get(portd, &stats);
+	rte_eth_stats_get(porte, &stats2);
 	if (stats.ipackets != 2 || stats.opackets != 2 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", portd);
 		return -1;
 	}
 
 	if (stats2.ipackets != 1 || stats2.opackets != 1 ||
 			stats2.ibytes != 0 || stats2.obytes != 0 ||
 			stats2.ierrors != 0 || stats2.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", porte);
 		return -1;
 	}
 
 	/*
-	 * send and receive 1 packet (RXTX_PORT3 -> RXTX_PORT3)
+	 * send and receive 1 packet (porte -> porte)
 	 * and check for stats update
 	 */
-	if (rte_eth_tx_burst(RXTX_PORT3, 0, &pbuf, 1) != 1) {
-		printf("Error sending packet to RXTX port\n");
+	printf("Testing send and receive 1 packet (porte -> porte)\n");
+	if (rte_eth_tx_burst(porte, 0, &pbuf, 1) != 1) {
+		printf("Error sending packet to port %d\n", porte);
 		return -1;
 	}
 
-	if (rte_eth_rx_burst(RXTX_PORT3, 0, &pbuf, 1) != 1) {
-		printf("Error receiving packet from RXTX port\n");
+	if (rte_eth_rx_burst(porte, 0, &pbuf, 1) != 1) {
+		printf("Error receiving packet from port %d\n", porte);
 		return -1;
 	}
 
-	rte_eth_stats_get(RXTX_PORT2, &stats);
-	rte_eth_stats_get(RXTX_PORT3, &stats2);
+	rte_eth_stats_get(portd, &stats);
+	rte_eth_stats_get(porte, &stats2);
 	if (stats.ipackets != 2 || stats.opackets != 2 ||
 			stats.ibytes != 0 || stats.obytes != 0 ||
 			stats.ierrors != 0 || stats.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", portd);
 		return -1;
 	}
 
 	if (stats2.ipackets != 2 || stats2.opackets != 2 ||
 			stats2.ibytes != 0 || stats2.obytes != 0 ||
 			stats2.ierrors != 0 || stats2.oerrors != 0) {
-		printf("Error: RXTX port stats are not as expected\n");
+		printf("Error: port %d stats are not as expected\n", porte);
 		return -1;
 	}
 
-	rte_eth_dev_stop(RXTX_PORT2);
-	rte_eth_dev_stop(RXTX_PORT3);
+	rte_eth_dev_stop(portd);
+	rte_eth_dev_stop(porte);
 
 	return 0;
 }
@@ -405,36 +424,95 @@ test_pmd_ring_pair_create_attach(void)
 static int
 test_pmd_ring(void)
 {
+	struct rte_ring *rxtx[NUM_RINGS];
+	int cmdl_port0 = 0;
+	uint8_t nb_ports;
+
+	nb_ports = rte_eth_dev_count();
+	printf("nb_ports=%d\n", (int)nb_ports);
+
+	/*  create the rings and eth_rings in the test code.
+	 *  This does not test the rte_pmd_ring_devinit function.
+	 *
+	 *  Test with the command line option --vdev=eth_ring0 to test rte_pmd_ring_devinit.
+	 */
+	rxtx[0] = rte_ring_create("R0", RING_SIZE, SOCKET0, RING_F_SP_ENQ|RING_F_SC_DEQ);
+	if (rxtx[0] == NULL) {
+		printf("rte_ring_create R0 failed");
+		return -1;
+	}
+
+	rxtx[1] = rte_ring_create("R1", RING_SIZE, SOCKET0, RING_F_SP_ENQ|RING_F_SC_DEQ);
+	if (rxtx[1] == NULL) {
+		printf("rte_ring_create R1 failed");
+		return -1;
+	}
+
+	tx_porta = rte_eth_from_rings("eth_ringa", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	rx_portb = rte_eth_from_rings("eth_ringb", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	rxtx_portc = rte_eth_from_rings("eth_ringc", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	rxtx_portd = rte_eth_from_rings("eth_ringd", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+	rxtx_porte = rte_eth_from_rings("eth_ringe", rxtx, NUM_RINGS, rxtx, NUM_RINGS, SOCKET0);
+
+	printf("tx_porta=%d rx_portb=%d rxtx_portc=%d rxtx_portd=%d rxtx_porte=%d\n",
+			tx_porta, rx_portb, rxtx_portc, rxtx_portd, rxtx_porte);
+
+	if ((tx_porta == -1) || (rx_portb == -1) || (rxtx_portc == -1)
+		|| (rxtx_portd == -1) || (rxtx_porte == -1)) {
+		printf("rte_eth_from rings failed\n");
+		return -1;
+	}
+
 	mp = rte_pktmbuf_pool_create("mbuf_pool", NB_MBUF, 32,
 		0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
 	if (mp == NULL)
 		return -1;
 
-	if ((TX_PORT >= RTE_MAX_ETHPORTS) || (RX_PORT >= RTE_MAX_ETHPORTS)\
-		|| (RXTX_PORT >= RTE_MAX_ETHPORTS)) {
-		printf(" TX/RX port exceed max eth ports\n");
+	if ((tx_porta >= RTE_MAX_ETHPORTS) || (rx_portb >= RTE_MAX_ETHPORTS)
+		|| (rxtx_portc >= RTE_MAX_ETHPORTS)
+		|| (rxtx_portd >= RTE_MAX_ETHPORTS)
+		|| (rxtx_porte >= RTE_MAX_ETHPORTS)) {
+		printf(" port exceed max eth ports\n");
 		return -1;
 	}
 
-	if (test_ethdev_configure() < 0)
+	if (test_ethdev_configure_port(tx_porta) < 0)
+		return -1;
+
+	if (test_ethdev_configure_port(rx_portb) < 0)
+		return -1;
+
+	if (test_ethdev_configure_port(rxtx_portc) < 0)
 		return -1;
 
 	if (test_send_basic_packets() < 0)
 		return -1;
 
-	if (test_get_stats() < 0)
+	if (test_get_stats(rxtx_portc) < 0)
 		return -1;
 
-	if (test_stats_reset() < 0)
+	if (test_stats_reset(rxtx_portc) < 0)
 		return -1;
 
-	rte_eth_dev_stop(RX_PORT);
-	rte_eth_dev_stop(TX_PORT);
-	rte_eth_dev_stop(RXTX_PORT);
+	rte_eth_dev_stop(tx_porta);
+	rte_eth_dev_stop(rx_portb);
+	rte_eth_dev_stop(rxtx_portc);
 
-	if (test_pmd_ring_pair_create_attach() < 0)
+	if (test_pmd_ring_pair_create_attach(rxtx_portd, rxtx_porte) < 0)
 		return -1;
 
+	if (nb_ports > 0) {
+		/* test port 0 created with the --vdev=eth_ring0 command line option */
+		if (test_ethdev_configure_port(cmdl_port0) < 0)
+			return -1;
+		if (test_send_basic_packets_port(cmdl_port0) < 0)
+			return -1;
+		if (test_stats_reset(cmdl_port0) < 0)
+			return -1;
+		if (test_get_stats(cmdl_port0) < 0)
+			return -1;
+		rte_eth_dev_stop(cmdl_port0);
+	}
 	return 0;
 }
 
