linaro@bm1684:~$ cat /etc/network/interfaces.d/eth0
auto eth0
iface eth0 inet dhcp
iface eth0 inet static
address 192.168.4.168
netmask 255.255.254.0
linaro@bm1684:~$ cat /etc/network/interfaces.d/eth1
auto eth1
iface eth1 inet static
address 192.168.4.169
netmask 255.255.254.0
gateway 192.168.4.1 这个可能会干扰上网
dns-nameservers 192.168.4.1