【完美解决】正点原子Linux开发板无法联网ping通百度但可以ping通主机和虚拟机，联通了局域网但无法联通互联网，DNS配置问题

问题记录

主机通过共享网络给以太网口想让正点原子的阿尔法Linux开发板连上网，网络配置过程如下：

开发板连接的是eth1口，通过在终端输入以下命令进入网络配置文件。

vi /etc/network/interfaces

将其配置为了以下地址

但是出现了一些问题，当我让开发板ping主机和Ubuntu虚拟机的网络地址时可以正常ping通，但是无法ping通百度和8.8.8.8，报错如下图所示：

root@ATK-IMX6U:~# ifdown eth1 && ifup eth1
[  718.367006] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[  718.473845] fec 2188000.ethernet eth1: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=20b4000.ethernet:02, irq=-1)
root@ATK-IMX6U:~# [  720.529332] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
[  722.474234] fec 2188000.ethernet eth1: Link is Up - 100Mbps/Full - flow control rx/tx
[  722.482120] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes readyroot@ATK-IMX6U:~# ping 192.168.137.1
PING 192.168.137.1 (192.168.137.1) 56(84) bytes of data.
64 bytes from 192.168.137.1: icmp_seq=1 ttl=128 time=0.593 ms
64 bytes from 192.168.137.1: icmp_seq=2 ttl=128 time=0.657 ms
64 bytes from 192.168.137.1: icmp_seq=3 ttl=128 time=0.423 ms
64 bytes from 192.168.137.1: icmp_seq=4 ttl=128 time=0.498 ms
64 bytes from 192.168.137.1: icmp_seq=5 ttl=128 time=0.530 ms
^C
--- 192.168.137.1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 3996ms
rtt min/avg/max/mdev = 0.423/0.540/0.657/0.081 ms
root@ATK-IMX6U:~# ping 192.168.137.4
PING 192.168.137.4 (192.168.137.4) 56(84) bytes of data.
From 192.168.137.1: icmp_seq=1 Redirect Network(New nexthop: 192.168.137.4)
64 bytes from 192.168.137.4: icmp_seq=1 ttl=63 time=0.791 ms
64 bytes from 192.168.137.4: icmp_seq=1 ttl=64 time=0.817 ms (DUP!)
From 192.168.137.1: icmp_seq=2 Redirect Network(New nexthop: 192.168.137.4)
64 bytes from 192.168.137.4: icmp_seq=2 ttl=63 time=0.420 ms
64 bytes from 192.168.137.4: icmp_seq=2 ttl=64 time=0.447 ms (DUP!)
64 bytes from 192.168.137.4: icmp_seq=2 ttl=63 time=0.464 ms (DUP!)
64 bytes from 192.168.137.4: icmp_seq=2 ttl=64 time=0.482 ms (DUP!)
From 192.168.137.1: icmp_seq=3 Redirect Network(New nexthop: 192.168.137.4)
64 bytes from 192.168.137.4: icmp_seq=3 ttl=63 time=0.364 ms
64 bytes from 192.168.137.4: icmp_seq=3 ttl=64 time=0.389 ms (DUP!)
64 bytes from 192.168.137.4: icmp_seq=3 ttl=63 time=0.407 ms (DUP!)
64 bytes from 192.168.137.4: icmp_seq=3 ttl=64 time=0.426 ms (DUP!)
^HFrom 192.168.137.1: icmp_seq=4 Redirect Network(New nexthop: 192.168.137.4)
64 bytes from 192.168.137.4: icmp_seq=4 ttl=63 time=0.376 ms
64 bytes from 192.168.137.4: icmp_seq=4 ttl=64 time=0.402 ms (DUP!)
64 bytes from 192.168.137.4: icmp_seq=4 ttl=63 time=0.420 ms (DUP!)
64 bytes from 192.168.137.4: icmp_seq=4 ttl=64 time=0.439 ms (DUP!)
^H^C
--- 192.168.137.4 ping statistics ---
4 packets transmitted, 4 received, +10 duplicates, 0% packet loss, time 2999ms
rtt min/avg/max/mdev = 0.364/0.474/0.817/0.140 ms
root@ATK-IMX6U:~# ping www.baidu.com
ping: unknown host www.baidu.com
root@ATK-IMX6U:~# ping www.baidu.com
ping: unknown host www.baidu.com
root@ATK-IMX6U:~# ./app_main
This is a SmartHome Demo!
ds_ui_page_thread created successfully
humi_arc created successfully: 0x3b65a0
aiot_mqtt_connect failed: -0x0F0Bplease check variables like mqtt_host, produt_key, device_name, device_secret in demo
net_mqtt_aliyun_init failed.
root@ATK-IMX6U:~# ./app_main
This is a SmartHome Demo!
ds_ui_page_thread created successfully
aiot_mqtt_connect failed: -0x0F0Bplease check variables like mqtt_host, produt_key, device_name, device_secret in demo
net_mqtt_aliyun_init failed.
root@ATK-IMX6U:~# ./app_main
This is a SmartHome Demo!
ds_ui_page_thread created successfully
aiot_mqtt_connect failed: -0x0F0Bplease check variables like mqtt_host, produt_key, device_name, device_secret in demo
net_mqtt_aliyun_init failed.
root@ATK-IMX6U:~# ping 8.8.8.
ping: unknown host 8.8.8.
root@ATK-IMX6U:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.137.10 icmp_seq=1 Destination Host Unreachable
From 192.168.137.10 icmp_seq=2 Destination Host Unreachable
From 192.168.137.10 icmp_seq=3 Destination Host Unreachable
From 192.168.137.10 icmp_seq=4 Destination Host Unreachable
From 192.168.137.10 icmp_seq=5 Destination Host Unreachable
From 192.168.137.10 icmp_seq=6 Destination Host Unreachable
^C
--- 8.8.8.8 ping statistics ---
7 packets transmitted, 0 received, +6 errors, 100% packet loss, time 6002ms
pipe 3
root@ATK-IMX6U:~#
可以看到可以ping通主机和Ubuntu，但是ping 8.8.8.8和百度就有问题