centos7多网卡配置bond0 （mode6无需交换机做配置）

# 首先备份两块网卡的配置文件
mv /etc/sysconfig/network-scripts/ifcfg-em1 /etc/sysconfig/bak_network-scripts/ifcfg-em1_bak
mv /etc/sysconfig/network-scripts/ifcfg-em2 /etc/sysconfig/bak_network-scripts/ifcfg-em2_bak

# 重新创建ifcfg-eth0网卡配置文件(em1;em2)
vim /etc/sysconfig/network-scripts/ifcfg-em1
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
NAME=em1
DEVICE=em1
ONBOOT=yes
MASTER=bond0
SLAVE=yes

# 创建bond0虚拟网卡配置文件ifcfg-bond0
vim /etc/sysconfig/network-scripts/ifcfg-bond0
DEVICE=bond0
NAME=bond0
TYPE=Bond
IPADDR=192.168.67.109
NETMASK=255.255.255.0
ONBOOT=yes
BOOTPROTO=none
BONDING_OPTS="mode=6 miimon=100"
USERCTL=no
GATEWAY=192.168.67.254

# 重启网卡生效

systemctl restart bond0