执行如下命令
systemctl stop NetworkManager
systemctl disable NetworkManager
systemctl start network.service
网络正常启动，访问正常。
参考：https://blog.51cto.com/addam/1839518
CentOS7 Failed to start LSB: Bring up/down解决方法
原文：https://www.cnblogs.com/shuai7boy/p/11902305.html