要求:将两张网卡绑定为一张网卡,em1为主,em2为备
一、将原来的两张网卡的配置文件备份
[root@localhost network-scripts]# mv ifcfg-em1 ifcfg-em1.bak [root@localhost network-scripts]# mv ifcfg-em2 ifcfg-em2.bak
二、新建两张网卡新配置文件
[root@localhost network-scripts]# vim ifcfg-em1 TYPE=Ethernet BOOTPROTO=none USERCTL=no DEVICE=em1 ONBOOT=yes MASTER=bond0 SLAVE=yes
[root@localhost network-scripts]# vim ifcfg-em1 TYPE=Ethernet BOOTPROTO=none USERCTL=no DEVICE=em2 ONBOOT=yes MASTER=bond0 SLAVE=yes
三、新建ifcfg-bond0文件
[root@localhost network-scripts]# vim ifcfg-bond0 TYPE=Ethernet BOOTPROTO=none ONBOOT=yes USERCTL=no DEVICE=bond0 IPADDR=34.34.30.21 NETMASK=255.255.255.0 GATEWAY=34.31.30.1 DNS1=8.8.8.8 DNS2=202.106.0.20 NM_CONTROLLED=no
四、新建/etc/modprobe.d/bond.conf文件
[root@localhost network-scripts]# vim /etc/modprobe.d/bond.conf alias bond0 bonding options bond0 miimon=100 mode=1
五、停止系统NetworkManager服务
[root@localhost network-scripts]# systemctl stop NetworkManager
[root@localhost network-scripts]# systemctl disable NetworkManager
六、重启network服务
[root@localhost network-scripts]# systemctl restart network
七、测试
将其中一张网卡网线拨出，网络没有影响
八、解绑
[root@localhost network-scripts]# cd /etc/sysconfig/network-scripts/ [root@localhost network-scripts]# mv ifcfg-bond0 ifcfg-bond0.bak [root@localhost network-scripts]# mv ifcfg-em1 ifcfg-em1-bond.bak [root@localhost network-scripts]# mv ifcfg-em2 ifcfg-em2-bond.bak
将原来备份的网卡配置文件恢复
[root@localhost network-scripts]# mv ifcfg-em1.bak ifcfg-em1 [root@localhost network-scripts]# mv ifcfg-em2.bak ifcfg-em2
删除bonding
[root@localhost network-scripts]# rmmod bonding
重启network服务
[root@localhost network-scripts]# systemctl restart network
启动NetworkManager服务
[root@localhost network-scripts]# systemctl start NetworkManager
[root@localhost ~]# systemctl enable NetworkManager
原文：https://www.cnblogs.com/sky-cheng/p/14838788.html