step 0：安装网卡绑定的功能
apt-get install ifenslave
step 1：加载内核模块：编辑 /etc/modules，添加：
bonding
step 2：编辑网卡配置：/etc/network/interfaces
auto enp0s3
iface enp0s3 inet dhcp auto enp0s8
iface enp0s8 inet manual
bond-master bond1 auto enp0s9
iface enp0s9 inet manual
bond-master bond1 auto bond1
iface bond1 inet static
bond-slaves enp0s8 enp0s9
bond-mode
address 192.168.56.200/