Solution to Failed to start LSB: Bring up/down networking when starting CentOS

I encountered this problem on a physical server. In order to avoid forgetting, I recorded it down so that I can search for it myself next time. The operating system installed on the independent server involved was centos7.*. The network was disconnected for no reason. I logged in through KVM and restarted the network, but it was also stuck. When I restarted the operating system, I found the prompt as shown in the title during startup, as shown in the figure below:

A start job is running for LSB: Bring up/down networking(**s / 5min 5s)

This process will not end until 5 minutes and 5 seconds have passed, and then report failure: Failed to start LSB: Bring up/down networking

There are generally two solutions on the Internet. One of them is to disable NetworkManager. After I handle it, the network is restored. Execute the command:

 systemctl stop NetworkManager
systemctl disable NetworkManager
systemctl restart network

Another way of saying it is that you need to add the MAC address to the network configuration file:

However, although I restored the network by disabling NetworkManager, the same problem occurred after the server was restarted and I needed to operate again. I don't know why. Friends who have encountered this problem and solved it completely are welcome to share. My solution is simple and crude: after the network is restored, back up the data to a different location, and reinstall the whole thing directly, and it's OK.