Centos 8 网卡connect: Network is unreachable错误解决办法

╰+哭是因爲堅強的太久メ 2023-10-14 21:46 35阅读 0赞

**现象1、ifconfig没有ens160配置**

\[test@localhost ~\]$ ifconfig

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536  
inet 127.0.0.1 netmask 255.0.0.0  
inet6 ::1 prefixlen 128 scopeid 0x10<host>  
loop txqueuelen 1000 (Local Loopback)  
RX packets 4 bytes 240 (240.0 B)  
RX errors 0 dropped 0 overruns 0 frame 0  
TX packets 4 bytes 240 (240.0 B)  
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500  
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255  
ether 52:54:00:5c:db:27 txqueuelen 1000 (Ethernet)  
RX packets 0 bytes 0 (0.0 B)  
RX errors 0 dropped 0 overruns 0 frame 0  
TX packets 0 bytes 0 (0.0 B)  
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0  
**现象2、使用ping或者nmcli命令提示NetworkManager is not running.**

\[test@localhost ~\]$ ping 192.168.215.1  
connect: Network is unreachable  
\[test@localhost ~\]$ nmcli  
Error: NetworkManager is not running.  
**先启动网络管理器**

systemctl start NetworkManager

设置自启动

sudo systemctl enable NetworkManager

**再使用nmcli查看态为unmanaged**

\[test@localhost ~\]$ nmcli  
virbr0: unmanaged  
"virbr0"  
bridge, 52:54:00:5C:DB:27, sw, mtu 1500

ens160: unmanaged  
"VMware VMXNET3"  
ethernet (vmxnet3), 00:0C:29:D1:E7:5F, hw, mtu 1500

lo: unmanaged  
"lo"  
loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

virbr0-nic: unmanaged  
"virbr0-nic"  
tun, 52:54:00:5C:DB:27, sw, mtu 1500

**使用nmcli connection up ens160和nmcli device up ens160 ，出现device is strictly unmanaged报错**

nmcli connection up ens160  
Error: Connection activation failed: No suitable device found for this connection (device lo not available because device is strictly unmanaged).

nmcli device up ens160  
Error: Failed to add/activate new connection: Connection 'ens160' is not available on device ens160 because device is strictly unmanaged  
**执行以下命令：**

nmcli device set ens160 managed yes 
    nmcli device status

DEVICE TYPE STATE CONNECTION  
br-1c57ae1d2940 bridge unmanaged --  
br-37a032e957ba bridge unmanaged --  
br-b365648bec89 bridge unmanaged --  
docker0 bridge unmanaged --  
ens160 ethernet unmanaged --  
veth1ea0122 ethernet unmanaged --  
veth5707956 ethernet unmanaged --  
lo loopback unmanaged --  
**解决办法：**  
查看网络状态

nmcli networking

手动开启接管

nmcli networking on

查看连接状态

nmcli connection show

nmcli device status

![ad2b78d5286642ff804918e9de0a04c5.png][]

**或者stop服务，再修改配置文件；最后启动服务**

systemctl stop NetworkManager

vi /var/lib/NetworkManager/NetworkManager.state

[main]
    NetworkingEnabled=true      //修改为true
    WirelessEnabled=true
    WWANEnabled=true

systemctl start NetworkManager