diff --git a/APP_Framework/Applications/connection_app/lwip_demo/lwip_config_demo.c b/APP_Framework/Applications/connection_app/lwip_demo/lwip_config_demo.c
index 0cca3f8c9..4268d2306 100755
--- a/APP_Framework/Applications/connection_app/lwip_demo/lwip_config_demo.c
+++ b/APP_Framework/Applications/connection_app/lwip_demo/lwip_config_demo.c
@@ -119,10 +119,9 @@ void lwip_getip_thread(int argc, char *argv[])
     lw_pr_info(" IPv4 Gateway   : %u.%u.%u.%u\r\n", ((u8_t *)&lwip_gwaddr)[0], ((u8_t *)&lwip_gwaddr)[1],
          ((u8_t *)&lwip_gwaddr)[2], ((u8_t *)&lwip_gwaddr)[3]);
     lw_pr_info("************************************************\r\n");
-
 }
 
 SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN) | SHELL_CMD_PARAM_NUM(0),
-     getip, lwip_getip_thread, GetIp [IP] [Netmask] [Gateway]);
+     showip, lwip_getip_thread, GetIp [IP] [Netmask] [Gateway]);
 
 #endif
diff --git a/APP_Framework/Applications/connection_app/lwip_demo/lwip_dhcp_demo.c b/APP_Framework/Applications/connection_app/lwip_demo/lwip_dhcp_demo.c
index 0c301795e..40c5ceaf2 100755
--- a/APP_Framework/Applications/connection_app/lwip_demo/lwip_dhcp_demo.c
+++ b/APP_Framework/Applications/connection_app/lwip_demo/lwip_dhcp_demo.c
@@ -34,36 +34,6 @@
 /*******************************************************************************
  * Definitions
  ******************************************************************************/
-/* IP address configuration. */
-#define configIP_ADDR0 192
-#define configIP_ADDR1 168
-#define configIP_ADDR2 0
-#define configIP_ADDR3 102
-
-/* Netmask configuration. */
-#define configNET_MASK0 255
-#define configNET_MASK1 255
-#define configNET_MASK2 255
-#define configNET_MASK3 0
-
-/* Gateway address configuration. */
-#define configGW_ADDR0 192
-#define configGW_ADDR1 168
-#define configGW_ADDR2 0
-#define configGW_ADDR3 100
-
-/* MAC address configuration. */
-#define configMAC_ADDR                     \
-    {                                      \
-        0x02, 0x12, 0x13, 0x10, 0x15, 0x11 \
-    }
-
-/* Address of PHY interface. */
-#define EXAMPLE_PHY_ADDRESS BOARD_ENET0_PHY_ADDRESS
-
-/* System clock name. */
-#define EXAMPLE_CLOCK_NAME kCLOCK_CoreSysClk
-
 
 /*******************************************************************************
  * Prototypes
@@ -155,31 +125,10 @@ int print_dhcp_state(struct netif *netif)
 void lwip_dhcp_test(void)
 {
     static int flag = 0;
-    struct netif fsl_netif0;
-    ip4_addr_t fsl_netif0_ipaddr, fsl_netif0_netmask, fsl_netif0_gw;
-    ethernetif_config_t fsl_enet_config0 = {
-        .phyAddress = EXAMPLE_PHY_ADDRESS,
-        .clockName  = EXAMPLE_CLOCK_NAME,
-        .macAddress = configMAC_ADDR,
-    };
     char ip_addr[4] = {0, 0, 0, 0};
 
     ETH_BSP_Config();
 
-//    IP4_ADDR(&fsl_netif0_ipaddr, 0U, 0U, 0U, 0U);
-//    IP4_ADDR(&fsl_netif0_netmask, 0U, 0U, 0U, 0U);
-//    IP4_ADDR(&fsl_netif0_gw, 0U, 0U, 0U, 0U);
-
-//    if(flag == 0)
-//    {
-//        lwip_init();
-//        netif_add(&fsl_netif0, &fsl_netif0_ipaddr, &fsl_netif0_netmask, &fsl_netif0_gw, &fsl_enet_config0,
-//            ethernetif0_init, ethernet_input);
-//        netif_set_default(&fsl_netif0);
-//        flag = 1;
-//    }
-
-//    netif_set_up(&fsl_netif0);
     lwip_config_net(ip_addr, ip_addr, ip_addr);
     is_lwip_test = 1;
 
@@ -200,6 +149,15 @@ void lwip_dhcp_test(void)
         /* Print DHCP progress */
         if(print_dhcp_state(&gnetif))
         {
+            sscanf(ipaddr_ntoa(&gnetif.ip_addr), "%d.%d.%d.%d", &lwip_ipaddr[0], &lwip_ipaddr[1],
+                &lwip_ipaddr[2], &lwip_ipaddr[3]);
+
+            sscanf(ipaddr_ntoa(&gnetif.netmask), "%d.%d.%d.%d", &lwip_netmask[0], &lwip_netmask[1],
+                &lwip_netmask[2], &lwip_netmask[3]);
+
+            sscanf(ipaddr_ntoa(&gnetif.gw), "%d.%d.%d.%d", &lwip_gwaddr[0], &lwip_gwaddr[1],
+                &lwip_gwaddr[2], &lwip_gwaddr[3]);
+
             break;
         }
     }
@@ -209,6 +167,6 @@ void lwip_dhcp_test(void)
 
 
 SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN) | SHELL_CMD_PARAM_NUM(0),
-     DHCPTest, lwip_dhcp_test, DHCP_Test);
+     getip, lwip_dhcp_test, DHCP_Test);
 
 #endif
diff --git a/APP_Framework/Applications/connection_app/lwip_demo/lwip_ping_demo.c b/APP_Framework/Applications/connection_app/lwip_demo/lwip_ping_demo.c
index 656b7349c..63379a12d 100755
--- a/APP_Framework/Applications/connection_app/lwip_demo/lwip_ping_demo.c
+++ b/APP_Framework/Applications/connection_app/lwip_demo/lwip_ping_demo.c
@@ -107,4 +107,18 @@ void lwip_ping_thread(int argc, char *argv[])
 SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN) | SHELL_CMD_PARAM_NUM(3),
      ping, lwip_ping_thread, ping [IP] 3 times);
 
+int lwip_dns_test(int argc, char **argv)
+{
+    if (argc <= 1)
+    {
+        lw_pr_info("Please input: ping <host address>\n");
+        return 0;
+    }
+
+    get_url_ip(argv[1]);
+    return 0;
+}
+SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN) | SHELL_CMD_PARAM_NUM(2),
+     dns, lwip_dns_test, dns [url]);
+
 #endif
diff --git a/APP_Framework/Applications/connection_app/lwip_demo/lwip_tcp_demo.c b/APP_Framework/Applications/connection_app/lwip_demo/lwip_tcp_demo.c
index 37f96abe8..89717b1b2 100755
--- a/APP_Framework/Applications/connection_app/lwip_demo/lwip_tcp_demo.c
+++ b/APP_Framework/Applications/connection_app/lwip_demo/lwip_tcp_demo.c
@@ -86,10 +86,9 @@ static void lwip_tcp_send_thread(void *arg)
     MdelayKTask(1000);
   }
 
-  return;
-
 __exit:
-  if (sock_tcp_send_once >= 0) closesocket(sock_tcp_send_once);
+  if (sock_tcp_send_once >= 0)
+    closesocket(sock_tcp_send_once);
 
   return;
 }
diff --git a/APP_Framework/Applications/connection_app/lwip_demo/ping.c b/APP_Framework/Applications/connection_app/lwip_demo/ping.c
index 375d61424..925f174ba 100755
--- a/APP_Framework/Applications/connection_app/lwip_demo/ping.c
+++ b/APP_Framework/Applications/connection_app/lwip_demo/ping.c
@@ -38,6 +38,7 @@
  *
  */
 
+#include <xs_ktask.h>
 #include "lwip/opt.h"
 
 #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
@@ -52,6 +53,8 @@
 #include "lwip/timeouts.h"
 #include "lwip/inet_chksum.h"
 #include "lwip/prot/ip4.h"
+#include "lwip/netdb.h"
+#include "lwip/prot/ip.h"
 
 #if PING_USE_SOCKETS
 #include "lwip/sockets.h"
@@ -245,7 +248,7 @@ ping_thread(void *arg)
 {
   int s;
   int ret;
-  int cnt = 5;
+  int cnt = TEST_LWIP_TIMES;
 
 #if LWIP_SO_SNDRCVTIMEO_NONSTANDARD
   int timeout = PING_RCV_TIMEO;
@@ -295,6 +298,7 @@ ping_thread(void *arg)
     }
     sys_msleep(PING_DELAY);
   }
+  lwip_close(s);
 }
 
 #else /* PING_USE_SOCKETS */
@@ -415,4 +419,126 @@ ping_init(const ip_addr_t* ping_addr)
 #endif /* PING_USE_SOCKETS */
 }
 
+int  lwip_ping_send(int s, ip_addr_t *addr, int size)
+{
+    int err;
+    struct icmp_echo_hdr *iecho;
+    struct sockaddr_in to;
+    int ping_size = sizeof(struct icmp_echo_hdr) + size;
+    LWIP_ASSERT("ping_size is too big", ping_size <= 0xffff);
+
+    iecho = malloc(ping_size);
+    if (iecho == NULL)
+    {
+        return ERR_MEM;
+    }
+
+    ping_prepare_echo(iecho, (u16_t) ping_size);
+
+    to.sin_len = sizeof(to);
+    to.sin_family = AF_INET;
+#if LWIP_IPV4 && LWIP_IPV6
+    to.sin_addr.s_addr = addr->u_addr.ip4.addr;
+#elif LWIP_IPV4
+    to.sin_addr.s_addr = addr->addr;
+#elif LWIP_IPV6
+#error Not supported IPv6.
+#endif
+
+    err = lwip_sendto(s, iecho, ping_size, 0, (struct sockaddr*) &to, sizeof(to));
+    free(iecho);
+
+    return (err == ping_size ? ERR_OK : ERR_VAL);
+}
+
+int lwip_ping_recv(int s, int *ttl)
+{
+    char buf[64];
+    int fromlen = sizeof(struct sockaddr_in), len;
+    struct sockaddr_in from;
+    struct ip_hdr *iphdr;
+    struct icmp_echo_hdr *iecho;
+
+    while ((len = lwip_recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr*) &from, (socklen_t*) &fromlen)) > 0)
+    {
+        if (len >= (int)(sizeof(struct ip_hdr) + sizeof(struct icmp_echo_hdr)))
+        {
+            iphdr = (struct ip_hdr *) buf;
+            iecho = (struct icmp_echo_hdr *) (buf + (IPH_HL(iphdr) * 4));
+            if ((iecho->id == PING_ID) && (iecho->seqno == htons(ping_seq_num)))
+            {
+                *ttl = iphdr->_ttl;
+                return len;
+            }
+        }
+    }
+
+    return len;
+}
+
+int get_url_ip(char* url)
+{
+#if LWIP_VERSION_MAJOR >= 2U
+    struct timeval timeout = { PING_RCV_TIMEO / TICK_PER_SECOND, PING_RCV_TIMEO % TICK_PER_SECOND };
+#else
+    int timeout = PING_RCV_TIMEO * 1000UL / TICK_PER_SECOND;
+#endif
+    int cnt = TEST_LWIP_TIMES;
+
+    int s, ttl, recv_len;
+    ip_addr_t target_addr;
+    struct addrinfo hint, *res = NULL;
+    struct sockaddr_in *h = NULL;
+    struct in_addr ina;
+
+    memset(&hint, 0, sizeof(hint));
+    /* convert URL to IP */
+    if (lwip_getaddrinfo(url, NULL, &hint, &res) != 0)
+    {
+        lw_pr_info("ping: unknown host %s\n", url);
+        return -1;
+    }
+    memcpy(&h, &res->ai_addr, sizeof(struct sockaddr_in *));
+    memcpy(&ina, &h->sin_addr, sizeof(ina));
+    lwip_freeaddrinfo(res);
+    if (inet_aton(inet_ntoa(ina), &target_addr) == 0)
+    {
+        lw_pr_info("ping: unknown host %s\n", url);
+        return -2;
+    }
+    /* new a socket */
+    if ((s = lwip_socket(AF_INET, SOCK_RAW, IP_PROTO_ICMP)) < 0)
+    {
+        lw_pr_info("ping: create socket failed\n");
+        return -3;
+    }
+
+    lwip_setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
+
+    while (cnt --)
+    {
+        if (ping_send(s, &target_addr) == ERR_OK)
+        {
+#ifdef LWIP_DEBUG
+            ping_time = sys_now();
+#endif /* LWIP_DEBUG */
+            if ((recv_len = lwip_ping_recv(s, &ttl)) >= 0)
+            {
+                lw_pr_info("%d bytes from %s icmp_seq=%d ttl=%d time=%d ms\n", recv_len, inet_ntoa(ina), cnt,
+                ttl, sys_now() - ping_time);
+            }
+            else
+            {
+                lw_pr_info("From %s icmp_seq=%d timeout\n", inet_ntoa(ina), cnt);
+            }
+        }
+
+        sys_msleep(PING_DELAY);
+    }
+
+    lwip_close(s);
+    return 0;
+}
+
+
 #endif /* LWIP_RAW */
diff --git a/APP_Framework/Applications/connection_app/lwip_demo/ping.h b/APP_Framework/Applications/connection_app/lwip_demo/ping.h
index 215fbe7f4..109bca9c5 100755
--- a/APP_Framework/Applications/connection_app/lwip_demo/ping.h
+++ b/APP_Framework/Applications/connection_app/lwip_demo/ping.h
@@ -7,7 +7,7 @@
  * PING_USE_SOCKETS: Set to 1 to use sockets, otherwise the raw api is used
  */
 #ifndef PING_USE_SOCKETS
-#define PING_USE_SOCKETS    0 //LWIP_SOCKET
+#define PING_USE_SOCKETS    LWIP_SOCKET
 #endif
 
 void ping_init(const ip_addr_t* ping_addr);
@@ -16,4 +16,6 @@ void ping_init(const ip_addr_t* ping_addr);
 void ping_send_now(void);
 #endif /* !PING_USE_SOCKETS */
 
+int get_url_ip(char* url);
+
 #endif /* LWIP_PING_H */
diff --git a/APP_Framework/Applications/connection_app/lwip_demo/udp_echo.c b/APP_Framework/Applications/connection_app/lwip_demo/udp_echo.c
index 883da9310..218933c03 100755
--- a/APP_Framework/Applications/connection_app/lwip_demo/udp_echo.c
+++ b/APP_Framework/Applications/connection_app/lwip_demo/udp_echo.c
@@ -176,10 +176,12 @@ static void UdpEchoThreadClient(void *arg)
 
     MdelayKTask(1000);
   }
-  return;
 
 __exit:
-  if (sock_udp_send_once >= 0) closesocket(sock_udp_send_once);
+  if (sock_udp_send_once >= 0)
+  {
+    closesocket(sock_udp_send_once);
+  }
 
   return;
 }
diff --git a/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/api_lib.c b/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/api_lib.c
index e03b8b745..a2c136f0b 100644
--- a/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/api_lib.c
+++ b/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/api_lib.c
@@ -246,7 +246,7 @@ netconn_delete(struct netconn *conn)
   } else
 #endif /* LWIP_NETCONN_FULLDUPLEX */
   {
-    err = netconn_prepare_delete(conn);
+//    err = netconn_prepare_delete(conn);
   }
   if (err == ERR_OK) {
     netconn_free(conn);
diff --git a/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/tcpip.c b/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/tcpip.c
index 743553a58..2ee532a7c 100644
--- a/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/tcpip.c
+++ b/Ubiquitous/XiUOS/resources/ethernet/LwIP/api/tcpip.c
@@ -601,8 +601,14 @@ tcpip_callbackmsg_trycallback_fromisr(struct tcpip_callback_msg *msg)
 void
 tcpip_init(tcpip_init_done_fn initfunc, void *arg)
 {
+  static int tcpip_flag = 0;
   lwip_init();
 
+  if(tcpip_flag)
+    return;
+
+  tcpip_flag = 1;
+
   tcpip_init_done = initfunc;
   tcpip_init_done_arg = arg;
   if (sys_mbox_new(&tcpip_mbox, TCPIP_MBOX_SIZE) != ERR_OK) {
diff --git a/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.c b/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.c
index f819e3882..15b6bc0e2 100644
--- a/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.c
+++ b/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.c
@@ -93,6 +93,8 @@ int is_lwip_test = 0; //for lwip input thread
 
 x_ticks_t lwip_sys_now;
 
+static int lwip_init_flag = 0;
+
 struct sys_timeouts {
   struct sys_timeo *next;
 };
@@ -318,7 +320,7 @@ void sys_mbox_free(sys_mbox_t *mbox)
 
 int sys_mbox_valid(sys_mbox_t *mbox)
 {
-  if (*mbox < SYS_MBOX_NULL)
+  if (*mbox <= SYS_MBOX_NULL)
     return 0;
   else
     return 1;
@@ -471,10 +473,6 @@ void lwip_config_input(struct netif *net)
 {
   pthread_t th_id = 0;
 
-  //neglect create input thread for test
-  if(is_lwip_test)
-    return;
-
   th_id = sys_thread_new("eth_input", lwip_input_thread, net, 4096, 15);
 
   if (th_id >= 0) {
@@ -484,8 +482,6 @@ void lwip_config_input(struct netif *net)
   }
 }
 
-static int lwip_init_flag = 0;
-
 void lwip_config_net(char *ip, char *mask, char *gw)
 {
 #if defined(FSL_FEATURE_SOC_LPC_ENET_COUNT) && (FSL_FEATURE_SOC_LPC_ENET_COUNT > 0)
@@ -521,17 +517,19 @@ void lwip_config_net(char *ip, char *mask, char *gw)
   netif_set_default(&gnetif);
   netif_set_up(&gnetif);
 
-  lw_pr_info("\r\n************************************************\r\n");
-  lw_pr_info(" Network Configuration\r\n");
-  lw_pr_info("************************************************\r\n");
-  lw_pr_info(" IPv4 Address   : %u.%u.%u.%u\r\n", ((u8_t *)&net_ipaddr)[0], ((u8_t *)&net_ipaddr)[1],
-       ((u8_t *)&net_ipaddr)[2], ((u8_t *)&net_ipaddr)[3]);
-  lw_pr_info(" IPv4 Subnet mask : %u.%u.%u.%u\r\n", ((u8_t *)&net_netmask)[0], ((u8_t *)&net_netmask)[1],
-       ((u8_t *)&net_netmask)[2], ((u8_t *)&net_netmask)[3]);
-  lw_pr_info(" IPv4 Gateway   : %u.%u.%u.%u\r\n", ((u8_t *)&net_gw)[0], ((u8_t *)&net_gw)[1],
-       ((u8_t *)&net_gw)[2], ((u8_t *)&net_gw)[3]);
-  lw_pr_info("************************************************\r\n");
-
+  if(is_lwip_test)
+  {
+    lw_pr_info("\r\n************************************************\r\n");
+    lw_pr_info(" Network Configuration\r\n");
+    lw_pr_info("************************************************\r\n");
+    lw_pr_info(" IPv4 Address   : %u.%u.%u.%u\r\n", ((u8_t *)&net_ipaddr)[0], ((u8_t *)&net_ipaddr)[1],
+         ((u8_t *)&net_ipaddr)[2], ((u8_t *)&net_ipaddr)[3]);
+    lw_pr_info(" IPv4 Subnet mask : %u.%u.%u.%u\r\n", ((u8_t *)&net_netmask)[0], ((u8_t *)&net_netmask)[1],
+         ((u8_t *)&net_netmask)[2], ((u8_t *)&net_netmask)[3]);
+    lw_pr_info(" IPv4 Gateway   : %u.%u.%u.%u\r\n", ((u8_t *)&net_gw)[0], ((u8_t *)&net_gw)[1],
+         ((u8_t *)&net_gw)[2], ((u8_t *)&net_gw)[3]);
+    lw_pr_info("************************************************\r\n");
+  }
   lwip_config_input(&gnetif);
 }
 
diff --git a/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.h b/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.h
index 2d9c8f89f..dab1c5445 100644
--- a/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.h
+++ b/Ubiquitous/XiUOS/resources/ethernet/LwIP/arch/sys_arch.h
@@ -92,7 +92,7 @@
 #define GW_ADDR3                    5
 /* USER CODE END 0 */
 
-#define SYS_MBOX_NULL  0
+#define SYS_MBOX_NULL  -1
 #define SYS_SEM_NULL   0
 #define SYS_MRTEX_NULL SYS_SEM_NULL