nmcli device status状态为unmanaged

遇到报错：(device lo not available because device is strictly unmanaged)

nmcli device status 查看设备状态

nmcli connection show状态为unmanaged

[root@192~]# nmcli connection show
NAME    UUID                                  TYPE      DEVICE
ens160  cf32e4bc-eaf9-3db0-98bb-2879bd5153d8  ethernet  --

尝试修复，出现device is strictly unmanaged报错

[root@192~]# nmcli connection up ens33
Error: Connection activation failed: No suitable device found for this connection (device lo not available because device is strictly unmanaged).

[root@192~]# nmcli device up ens33
Error: Failed to add/activate new connection: Connection 'ens33' is not available on device ens160 because device is strictly unmanaged

[root@192~]# nmcli device set ens33 managed yes
[root@192~]# nmcli device status

尝试restart和reload NetworkManager.service均无效

[root@192~]# systemctl reload NetworkManager.service

解决办法：

我的解决办法是

确定NetworkManager是否已接管了系统的网络连接管理

[root@192~]# nmcli networking
disabled

若没有解决则需要手动开启接管

[root@192~]# nmcli networking on

接管后恢复正常

[root@192~]# nmcli connection show
NAME    UUID                                  TYPE      DEVICE
ens33  cf32e4bc-eaf9-3db0-98bb-2879bd5153d8  ethernet  ens33
[root@192~]# nmcli device status
DEVICE           TYPE      STATE                   CONNECTION
ens33           ethernet  connected               ens33