CENTOS7 Network reboot unreachable, check for IPv4 address conflicts with NetworkManager

Today, when using virtual machine centos7, we find that CENTOS7 cannot be accessed remotely.

The inspection found that IPv4 did not start up,

Then restart the NIC

# systemctl Restart Network

found that the network card is started, IPv4 has an IP address but after a few minutes IPv4 disappeared again, check the configuration is not a problem.

Find data Find Centos7 Network and NetworkManager conflict

Then we can only deactivate the NetworkManager here.

#systemctl Stop NetworkManager//temporarily off #systemctl disable NetworkManager//permanently off

Deactivate NetworkManager find IPv4 can be used normally

Method two (not tested)

Or add a/etc/sysconfig/network-scripts/ifcfg-enxxx the last side of the line

Nm_controlled=no # Add this line

CENTOS7 Network reboot unreachable, check for IPv4 address conflicts with NetworkManager