The NIC is having problems job for Network.service failed

The Centos7 NIC needs to be written to the MAC address or it won't start.

The error "Job for Network.service failed" occurs when you run the "/etc/init.d/network restart" command. See ' systemctl status Network.service ' and ' journalctl-xn ' for Deta', run 'cat/var/log/messages | grep network "command to view the network -related information that appears in the log, the following output statements are found:

Nov 11:31:16 OpenStack network:bringing up Interface Eth0:Error:no device found for connection ' eth0 '.

Nov 11:31:16 OpenStack Network: [FAILED]

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Network:rtnetlink answers:file exists

Nov 11:31:16 OpenStack Systemd:network.service:control Process exited, code=exited Status=1

Nov 11:31:16 OpenStack systemd:failed to start lsb:bring up/down networking.

Nov 11:31:16 OpenStack Systemd:unit Network.service entered failed state.

From the error "Error:no device found for connection ' eth0" can determine the problem with the configuration file eth0 , open view /etc/ Sysconfig/network-scripts/ifcfg-eth0 file found mac address and ifconfig command output The address is different, as follows:

[Email protected] ~]# Cat/etc/sysconfig/network-scripts/ifcfg-eth0

hwaddr= 1a:e9:47:a5:75:c8

Type=ethernet

Bootproto=static

Defroute=yes

Peerdns=yes

Peerroutes=yes

Ipv4_failure_fatal=no

Ipv6init=yes

Ipv6_autoconf=yes

Ipv6_defroute=yes

Ipv6_peerdns=yes

Ipv6_peerroutes=yes

Ipv6_failure_fatal=no

ipaddr=192.168.1.79

Prefix=24

gateway=192.168.1.1

dns1=192.168.1.1

dns2=8.8.8.8

Name=eth0

Uuid=ba670f0c-201a-483b-8379-c8c72c03ab27

Onboot=yes

[Email protected] ~]# ifconfig

Eth0:flags=4163<up,broadcast,running,multicast> MTU 1500

inet 192.168.1.79 netmask 255.255.255.0 broadcast 192.168.1.255

Inet6 fe80::8081:a6ff:fe9d:5887 Prefixlen ScopeID 0x20<link>

ether 82:81:a6:9d:58:87 Txqueuelen (Ethernet)

RX packets 3426 Bytes 394042 (384.8 KiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX Packets bytes 9578 (9.3 KiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

So simply change the value of the HWADDR variable in the ifcfg-eth0 to the MAC address shown in the ifconfig command.

Source: http://my.oschina.net/u/1169607/blog/345921

From for notes (Wiz)

The NIC is having problems job for Network.service failed