本文以飞凌嵌入式OKMX6ULL-S开发板为基础讲解，其它板卡请参考使用，本文主要讲解了iMX6ULL 网络功能的测试，分为无线网络测试以及有线网络测试，通过本文您可以快速了解飞凌iMX6ULL开发板网络测试的全过程。
1、基本命令测试
每个开发板的网络使用环境未必相同，本节测试示例中，网络环境如下。实际使用中，请按照实际网络环境自行进行配置。
底板丝印 | 软件设备 |
NET1 | eth1 |
NET2 | eth0 |
OKMX6ULL-C有eth0、eth1两路网卡。开机已设置默认eth0、eth1自动分配IP。如果修改IP请修改/etc/network/interfaces。
注意：eth1与eth0不能用于同一个局域网。
下面以eth0为例进行命令说明。
1.1、在Linux系统下，使用ifconfig命令可以显示或配置网络设备，使用ethtool查询及设置网卡参数。
1.2、设置IP地址 ，查看当前网卡详情：
root@fl-imx6ull:~# ifconfig eth0 192.168.1.120root@fl-imx6ull:~#ifconfig eth0eth0 Link encap:Ethernet HWaddr 3A:D9:93:8E:A8:A4 inet addr:192.168.1.120 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::38d9:93ff:fe8e:a8a4%2124311408/64 Scope:Link inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2124311408/64 Scope:Site UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:28 errors:0 dropped:0 overruns:0 frame:0 TX packets:63 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:11550 (11.2 KiB) TX bytes:11579 (11.3 KiB)
1.3、动态分配IP地址
如果您的开发板与路由器连接，且路由器支持DHCP自动IP地址分配可以在超级终端里面输入命令：
root@fl-imx6ull:~#udhcpc -i eth0udhcpc (v1.24.1) startedSending discover...Sending select for 192.168.20.101...Lease of 192.168.20.101 obtained, lease time 86400/etc/udhcpc.d/50default: Adding DNS 222.222.222.222
用来动态获取IP地址，“-i” 参数用来指定网卡名称，飞凌iMX6ULL开发板有线网络的网卡名称为eth0。
/etc/resolv.conf文件中有dns服务器信息会被自动添加。
1.4、修改mac地址：
root@fl-imx6ull:~#ifconfig eth0 hw ether 00:00:00:00:00:01root@fl-imx6ull:~#ifconfig eth0eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:01 inet addr:192.168.20.101 Bcast:192.168.20.255 Mask:255.255.255.0 inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2128292720/64 Scope:Site inet6 addr: fec0::200:ff:fe00:1%2128292720/64 Scope:Site UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:85 errors:0 dropped:0 overruns:0 frame:0 TX packets:118 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:22942 (22.4 KiB) TX bytes:22259 (21.7 KiB)
另外在/forlinx/shell/mac.sh中根据uid设置MAC地址，如果需要请添加到开机自启动脚本中。
1.5、设置子网掩码：
root@fl-imx6ull:~#ifconfig eth0 netmask 255.255.255.0root@fl-imx6ull:~#ifconfig eth0eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:01 inet addr:192.168.20.101 Bcast:192.168.20.255 Mask:255.255.255.0 inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2128915312/64 Scope:Site inet6 addr: fec0::200:ff:fe00:1%2128915312/64 Scope:Site UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:107 errors:0 dropped:0 overruns:0 frame:0 TX packets:118 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:25700 (25.0 KiB) TX bytes:22259 (21.7 KiB)
1.6、设置广播地址
root@fl-imx6ull:~#ifconfig eth0 broadcast 192.168.20.120root@fl-imx6ull:~#ifconfig eth0eth0 Link encap:Ethernet HWaddr 00:00:00:00:00:01 inet addr:192.168.20.101 Bcast:192.168.20.120 Mask:255.255.255.0 inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2123332464/64 Scope:Site inet6 addr: fec0::200:ff:fe00:1%2123332464/64 Scope:Site UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:111 errors:0 dropped:0 overruns:0 frame:0 TX packets:132 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:26130 (25.5 KiB) TX bytes:25947 (25.3 KiB)
1.7、添加/删除默认网关
添加默认网关：
root@fl-imx6ull:~#route add default gw 192.168.20.1
删除默认网关：
root@fl-imx6ull:~#route del default gw 192.168.20.1
1.8、关闭开启网卡
关闭eth0网卡：
root@fl-imx6ull:~#ifconfig eth0 down
开启eth0网卡：
root@fl-imx6ull:~#ifconfig eth0 upfec 20b4000.ethernet eth0: Freescale FEC PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=20b4000.ethernet:01, irq=-1)root@fl-imx6ull:~# fec 20b4000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
2、 FTP服务
2.1、设置root用户密码，这里设置为forlinx，输入密码没有回显，串口终端无法看到输入内容。
root@imx6ullevk:~# passwd rootNew password:Re-enter new password:
2.2、然后配置开发板ip地址，保证和电脑通信正常。
root@imx6ullevk:~#ifconfig eth0 192.168.2.207root@imx6ullevk:~#ping 192.168.2.135 -c 3
2.3、电脑使用FileZilla连接iMX6ULL开发板。
2.3.1. 点击文件，站点管理器：
2.3.2. 创建“新站点”，主机输入开发板IP，加密方式选择只是用明文FTP，登陆类型选择正常，用户和密码为开发板的用户和密码，点击“连接”。
3、SSH登录测试
以太网相关服务测试之前，确保已经设置好IP。设置IP请参考以太网驱动测试部分。
配置信息：
开发板ip：192.168.2.85
Linux主机地址：192.168.2.149
Windows主机地址：192.168.2.12
3.1、测试由linux主机通过ssh访问开发板
zs@developer-RH2485-V2:~$ssh root@192.168.2.85The authenticity of host '192.168.2.85 (192.168.2.85)' can't be established.RSA key fingerprint is 25:57:00:82:72:8f:09:8e:2d:b9:9b:41:e5:d6:06:bb.Are you sure you want to continue connecting (yes/no)? yPlease type 'yes' or 'no': yesWarning: Permanently added '192.168.2.85' (RSA) to the list of known hosts.
3.2、测试由Windows主机通过cmd.exe或者Cmder访问开发板：
$ ssh root@192.168.2.85root@fl-imx6ull:~#
3.3、由iMX6ULL开发板访问linux主机
root@fl-imx6ull:~#dbclient zs@192.168.2.149Host '192.168.2.149' is not in the trusted hosts file.(ecdsa-sha2-nistp256 fingerprint md5 93:ff:74:8a:ed:ba:fd:21:39:d9:87:93:ad:9e:19:6f)Do you want to continue connecting? (y/n) yzs@192.168.2.149's password:Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 4.4.0-31-generic x86_64) * Documentation: https://help.ubuntu.com/504 packages can be updated.421 updates are security updates.New release '16.04.6 LTS' available.Run 'do-release-upgrade' to upgrade to it.Last login: Mon Mar 23 12:50:22 2020 from 192.168.2.87
4、USB转网络测试
4.1、将USB转以太网插入USB host接口，识别信息如下：
usb 1-1.3: new high-speed USB device number 8 using ci_hdrc
asix 1-1.3:1.0 eth2: register 'asix' at usb-ci_hdrc.1-1.3, ASIX AX88772B USB 2.0 Ethernet, 00:0e:c6:8f:9c:b7
IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready
4.2、测试方法参考以太网驱动测试章节。
1、WIFI测试
RTL8188eus—USB WIFI、RTL8723bu—USB WIFI使用方法如下。
1.1、USB WIFI RTL8188eus使用
USB WIFI无线局域网卡是选配模块。
步骤1：开发板上电，启动Linux系统。
步骤2：连接USB WIFI到飞凌开发板的USB host接口，正确安装如下图。
步骤3：打开脚本所在的位置：
root@fl-imx6ull:~#cd /forlinx/shell/
步骤4：按照如下格式输入相应的参数：
说明：
-s表示wifi热点的名称
-p表示密码，如果没有密码请输入-p NONE
路由器采用wpa加密方式。
连接打印内容如下：
root@fl-imx6ull:/forlinx/shell#./wifi.sh -i 8188 -s forlinx -p xxxxwifi 8188ssid forlinxpasw xxxxusbcore: deregistering interface driver rtl8723buRTL871X: module exit startusbcore: deregistering interface driver rtl8188euRTL871X: rtw_ndev_uninit(wlan1)usb 1-1.3: reset high-speed USB device number 7 using ci_hdrcRTL871X: module exit successRTL871X: module init startRTL871X: rtl8188eu v4.3.0.9_15178.20150907RTL871X: build time: Mar 25 2020 02:23:46bFWReady == _FALSE call reset 8051...RTL871X: rtw_ndev_init(wlan0)usbcore: registered new interface driver rtl8188euRTL871X: module init ret=0==> rtl8188e_iol_efuse_patchIPv6: ADDRCONF(NETDEV_UP): wlan0: link is not readps: invalid option -- 'f'BusyBox v1.24.1 (2019-04-27 02:24:01 CST) multi-call binary.Usage: psSuccessfully initialized wpa_supplicantrfkill: Cannot open RFKILL controRTL871X: set bssid:00:00:00:00:00:00l deviceRTL871X: set ssid [g▒isQ▒J▒)ͺ▒▒▒▒F|▒T▒▒vZ.c3▒ɚ�<▒▒▒▒] fw_state=0x00000008ioctl[SIOCSIWAP]: Operation not permittedioctl[SIOCGIWSCAN]: Resource temporarily unavailableioctl[SIOCGIWSCAN]: Resource temporarily unavailableRTL871X: indicate disassocwlan0: Trying to associate with 04:d7:a5:84:fa:40 (SSID='forlinx' freq=2437 MHz)RTL871X: set ssid [forlinx] fw_state=0x00000008RTL871X: set bssid:04:d7:a5:84:fa:40RTL871X: start authRTL871X: auth success, start assocRTL871X: assoc successIPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes readyRTL871X: recv eapol packetwlan0: Associated with 04:d7:a5:84:fa:40RTL871X: send eapol packetRsvdPageNum: 8udhcpc (v1.24.1) startedRTL871X: recv eapol packetRTL871X: send eapol packetRTL871X: recv eapol packetRTL871X: send eapol packetRTL871X: set pairwise key camid:4, addr:04:d7:a5:84:fa:40, kid:0, type:AESwlan0: WPA: Key negotiation completed with 04:d7:a5:84:fa:40 [PTKRTL871X: set group key camid:5, addr:04:d7:a5:84:fa:40, kid:2, type:AES=CCMP GTK=CCMP]wlan0: CTRL-EVENT-CONNECTED - Connection to 04:d7:a5:84:fa:40 completed [id=0 id_str=]Sending discover...Sending select for 192.168.4.129...Lease of 192.168.4.129 obtained, lease time 36000/etc/udhcpc.d/50default: Adding DNS 222.222.202.202/etc/udhcpc.d/50default: Adding DNS 222.222.222.222Finshed!
步骤5：ping ip或者域名，命令如下。
root@fl-imx6ull:/forlinx/shell#ping -c 4 www.baidu.comPING www.baidu.com (220.181.38.149): 56 data bytes64 bytes from 220.181.38.149: seq=0 ttl=51 time=26.648 ms64 bytes from 220.181.38.149: seq=1 ttl=51 time=13.529 ms64 bytes from 220.181.38.149: seq=2 ttl=51 time=15.656 ms64 bytes from 220.181.38.149: seq=3 ttl=51 time=26.249 ms--- www.baidu.com ping statistics ---4 packets transmitted, 4 packets received, 0% packet lossround-trip min/avg/max = 13.529/20.520/26.648 ms
步骤6：卸载已经加入内核的模块。
root@fl-imx6ull:/forlinx/shell#rmmod 8188euRTL871X: module exit startusbcore: deregistering interface driver rtl8188euRTL871X: indicate disassocRTL871X: rtw_cmd_thread: DriverStopped(1) SurpriseRemoved(0) break at line 478wlan0: CTRL-EVENT-DISCONNECTED bssid=04:d7:a5:84:fa:40 reason=3 locally_generated=1RTL871X: rtw_ndev_uninit(wlan0)RTL871X: rtw_dev_unload: driver not in IPSusb 1-1.3: reset high-speed USB device number 7 using ci_hdrcRTL871X: module exit success
2、板载WIFI的使用
如果开发板有板载的WIFI无线局域网卡，则焊接在评估板如图所示位置：
步骤1：检查开发板是否已经焊接该模块，正确焊接如上图。连接上天线。
步骤2：开发板上电，启动Linux系统。
步骤3：进入测试脚本所在目录：
root@fl-imx6ull:~# cd /forlinx/shell
步骤4：执行测试脚本：
说明：-s表示wifi热点的名称；
-p表示密码，如果没有密码请输入-p NONE；
路由器采用wpa加密方式。
连接打印内容如下：
root@fl-imx6ull:/forlinx/shell#./wifi.sh -i 8723 -sforlinx -pxxxxwifi 8723ssid forlinxpaswxxxxusbcore: deregistering interface driver rtl8723buusbcore: registered new interface driver rtl8723buIPv6: ADDRCONF(NETDEV_UP): wlan0: link is not readyps: invalid option -- 'f'BusyBox v1.24.1 (2019-04-27 02:24:01 CST) multi-call binary.Usage: psSuccessfully initialized wpa_supplicantrfkill: Cannot open RFKILL control devicewlan0: Trying to associate with 04:d7:a5:84:fa:40 (SSID='forlinx' freq=2437 MHz)IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes readywlan0: Associated with 04:d7:a5:84:fa:40wlan0: WPA: Key negotiation completed with 04:d7:a5:84:fa:40 [PTK=CCMP GTK=CCMP]wlan0: CTRL-EVENT-CONNECTED - Connection to 04:d7:a5:84:fa:40 completed [id=0 id_str=]udhcpc (v1.24.1) startedSending discover...Sending discover...Sending select for 192.168.4.225...Lease of 192.168.4.225 obtained, lease time 36000/etc/udhcpc.d/50default: Adding DNS 222.222.202.202/etc/udhcpc.d/50default: Adding DNS 222.222.222.222Finshed!
步骤5：ping ip或者域名，命令如下。
root@fl-imx6ull:/forlinx/shell#ping -c 5 192.168.4.1PING 192.168.4.1 (192.168.4.1): 56 data bytes64 bytes from 192.168.4.1: seq=0 ttl=128 time=39.783 ms64 bytes from 192.168.4.1: seq=1 ttl=128 time=81.529 ms64 bytes from 192.168.4.1: seq=2 ttl=128 time=15.236 ms64 bytes from 192.168.4.1: seq=3 ttl=128 time=12.076 ms64 bytes from 192.168.4.1: seq=4 ttl=128 time=16.300 ms--- 192.168.4.1 ping statistics ---5 packets transmitted, 5 packets received, 0% packet lossround-trip min/avg/max = 12.076/32.984/81.529 ms
步骤6：卸载已经加入内核的模块：
root@fl-imx6ull:/forlinx/shell#rmmod 8723buusbcore: deregistering interface driver rtl8723buwlan0: CTRL-EVENT-DISCONNECTED bssid=04:d7:a5:84:fa:40 reason=0
2、4G模块实现IE上网
2.1、将外扩USB 4G扩展板插入USB口，固定ME909s-821 PCIE封装4G模块，安装ipex天线座，插入SIM卡，开机上电。
2.2、拨号上网
root@fl-imx6ull:~#cd /forlinx/shell/root@fl-imx6ull:/forlinx/shell#./me909s.sheth0 Link encap:Ethernet HWaddr 7E:09:81:93:F3:0Aeth1 Link encap:Ethernet HWaddr DE:EA:3F:6C:A7:33wlan0 Link encap:Ethernet HWaddr 7C:A7:B0:0F:FC:14udhcpc (v1.24.1) startedSending discover...Sending select for 10.63.223.158...Lease of 10.63.223.158 obtained, lease time 518400/etc/udhcpc.d/50default: Adding DNS 222.222.222.222/etc/udhcpc.d/50default: Adding DNS 222.222.202.202fec 20b4000.ethernet eth0: Freescale FEC PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=20b4000.ethernet:01, irq=-1)IPv6: ADDRCONF(NETDEV_UP): eth0: link is not readyfec 2188000.ethernet eth1: Freescale FEC PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=20b4000.ethernet:02, irq=-1)IPv6: ADDRCONF(NETDEV_UP): eth1: link is not readyFinished!
2.3、连接成功之后，ping百度测试：
root@fl-imx6ull:/forlinx/shell#ping www.baidu.comPING www.baidu.com (220.181.38.150): 56 data bytes64 bytes from 220.181.38.150: seq=0 ttl=53 time=59.450 ms64 bytes from 220.181.38.150: seq=1 ttl=53 time=71.086 ms64 bytes from 220.181.38.150: seq=2 ttl=53 time=57.385 ms64 bytes from 220.181.38.150: seq=3 ttl=53 time=71.033 ms--- www.baidu.com ping statistics ---4 packets transmitted, 4 packets received, 0% packet lossround-trip min/avg/max = 57.385/64.738/71.086 ms
2.4、断网与复位指令测试：
断开网络连接：
root@fl-imx6ull:/forlinx/shell#echo "AT^NDISDUP=1,0"> /dev/ttyUSB2
复位重启模块：
root@fl-imx6ull:/forlinx/shell#echo "AT^RESET "> /dev/ttyUSB2
2.5、更换SIM卡需要更换me909.sh中相应的APN：
中国移动：
echo "AT^NDISDUP=1,1,\"cmnet\""> /dev/ttyUSB2
中国联通：
echo "AT^NDISDUP=1,1,\"3gnet\""> /dev/ttyUSB2
中国电信（本文使用）：
echo "AT^NDISDUP=1,1,\"ctnet\""> /dev/ttyUSB2
3、GPRS模块测试
GPRS模块与开发板之间采用串口连接，客户可以使用飞凌公司自产的GPRS模块，也可以使用自己购买的串口GPRS模块。
1）在确保模块和开发板串口UART3连接、上电OK情况下， 启动开发板子，进入命令行终端输入如下命令。
root@fl-imx6ull:~#cd /forlinx/shell/root@fl-imx6ull:~#pppd call gprs /dev/ttymxc2 &[1] 638root@fl-imx6ull:/etc/ppp/peers# timeout set to 15 secondsabort on (\nDELAYED\r)abort on (\nBUSY\r)abort on (\nERROR\r)abort on (\nNO DIALTONE\r)abort on (\nNO CARRIER\r)send (^MAT^M)expect (OK)AT^M^MOK -- got itsend (ATS0=0^M)expect (OK)^MATS0=0^M^MOK -- got it send (ATE0V1^M)expect (OK)^MATE0V1^M^MOK -- got itsend (AT+CGDCONT=1,"IP","CMNET"^M)expect (OK)^M^MOK -- got it send (ATDT*99***1#^M)expect (CONNECT)^M^MCONNECT -- got it send (^M)Script /usr/sbin/chat -s -v -f /etc/ppp/peers/chat-gprs-connect finished (pid 639), status = 0x0Serial connection established.using channel 1Using interface ppp0Connect: ppp0 <--> /dev/ttymxc2sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x23b2996e> <pcomp> <accomp>]rcvd [LCP ConfReq id=0x1 <asyncmap 0xa0000> <auth pap>]No auth is possiblesent [LCP ConfRej id=0x1 <auth pap>]rcvd [LCP ConfRej id=0x1 <magic 0x23b2996e> <pcomp> <accomp>]sent [LCP ConfReq id=0x2 <asyncmap 0x0>]rcvd [LCP ConfReq id=0x2 <asyncmap 0xa0000> <auth chap MD5>]No auth is possiblesent [LCP ConfRej id=0x2 <auth chap MD5>]rcvd [LCP ConfAck id=0x2 <asyncmap 0x0>]rcvd [LCP ConfReq id=0x3 <asyncmap 0xa0000>]sent [LCP ConfAck id=0x3 <asyncmap 0xa0000>]sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]rcvd [IPCP ConfReq id=0x1 <addr 192.200.1.21>]sent [IPCP ConfAck id=0x1 <addr 192.200.1.21>]rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01>]sent [IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]rcvd [IPCP ConfNak id=0x2 <addr 10.131.70.33> <ms-dns1 111.11.1.3> <ms-dns2 111.11.11.3>]sent [IPCP ConfReq id=0x3 <addr 10.131.70.33> <ms-dns1 111.11.1.3> <ms-dns2 111.11.11.3>]rcvd [IPCP ConfAck id=0x3 <addr 10.131.70.33> <ms-dns1 111.11.1.3> <ms-dns2 111.11.11.3>]not replacing existing default route via 192.168.1.1 with metric -1local IP address 10.131.70.33remote IP address 192.200.1.21primary DNS address 111.11.1.3secondary DNS address 111.11.11.3
2）连接成功可以尝试ping一下www.forlinx.com
root@fl-imx6ull:~#ping www.forlinx.comPING www.forlinx.com (39.156.66.18): 56 data bytes64 bytes from 39.156.66.18: seq=0 ttl=51 time=315.605 ms64 bytes from 39.156.66.18: seq=1 ttl=51 time=732.351 ms64 bytes from 39.156.66.18: seq=2 ttl=51 time=234.874 ms64 bytes from 39.156.66.18: seq=3 ttl=51 time=2990.813 ms64 bytes from 39.156.66.18: seq=4 ttl=51 time=2110.219 ms64 bytes from 39.156.66.18: seq=5 ttl=51 time=1151.022 ms64 bytes from 39.156.66.18: seq=6 ttl=51 time=450.403 ms64 bytes from 39.156.66.18: seq=7 ttl=51 time=4650.867 ms64 bytes from 39.156.66.18: seq=8 ttl=51 time=3747.240 ms64 bytes from 39.156.66.18: seq=9 ttl=51 time=2866.635 ms64 bytes from 39.156.66.18: seq=10 ttl=51 time=1986.155 ms64 bytes from 39.156.66.18: seq=11 ttl=51 time=1087.178 ms64 bytes from 39.156.66.18: seq=12 ttl=51 time=368.113 ms--- www.forlinx.com ping statistics ---13 packets transmitted, 13 packets received, 0% packet lossround-trip min/avg/max = 234.874/1745.498/4650.867 ms
注意： 假如ping命令不通，可能是之前测试以太网或无线网络接口时的一些配置的影响，此时需要先执行以下命令再测试模块：
root@imx6ulevk:~# ifconfig eth0 downroot@imx6ulevk:~#ifconfig wlan0 down
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