一、在centos7主机创建用于虚拟化的网桥

 1)增加 /etc/sysconfig/network-scripts/ifcfg-br0

DEVICE=br0
BOOTPROTO=static
ONBOOT=yes
TYPE=Bridge
IPADDR=192.168.137.122
NETMASK=255.255.255.0
GATEWAY=192.168.137.2
DNS1=8.8.8.8
2）找到本机现在IP使用的网卡，本列题为    /etc/sysconfig/network-scripts/ifcfg-eth1

 

3)重启网卡  systemctl restart network