centos7 重启网卡失败

古城微笑少年丶 2023-06-20 06:26 14阅读 0赞

今天在centOS 7 network服务重启不了

现把各种解决方法归纳整理，希望能让后面的同学少走点歪路。。。

首先看问题：执行service network restart命令后出现下面的错误：

Restarting network (via systemctl): Job for network.service failed because the control process exited with error code.  
See "systemctl status network.service" and "journalctl -xe" for details. \[失败\]  
根据提示输入systemctl status network.service命令后出现如下错误信息：  
● network.service - LSB: Bring up/down networking  
Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)  
Active: failed (Result: exit-code) since 五 2017-07-14 19:01:47 CST; 1min 16s ago  
Docs: man:systemd-sysv-generator(8)  
Process: 4681 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)  
CGroup: /system.slice/network.service  
└─1192 /sbin/dhclient -H mini1 -1 -q -lf /var/lib/dhclient/dhclient--ens33.lease -pf /v...  
7月 14 19:01:47 mini1 network\[4681\]: RTNETLINK answers: File exists  
7月 14 19:01:47 mini1 network\[4681\]: RTNETLINK answers: File exists  
7月 14 19:01:47 mini1 network\[4681\]: RTNETLINK answers: File exists  
7月 14 19:01:47 mini1 network\[4681\]: RTNETLINK answers: File exists  
7月 14 19:01:47 mini1 network\[4681\]: RTNETLINK answers: File exists  
7月 14 19:01:47 mini1 network\[4681\]: RTNETLINK answers: File exists  
7月 14 19:01:47 mini1 systemd\[1\]: network.service: control process exited, code=exited status=1  
7月 14 19:01:47 mini1 systemd\[1\]: Failed to start LSB: Bring up/down networking.  
7月 14 19:01:47 mini1 systemd\[1\]: Unit network.service entered failed state.  
7月 14 19:01:47 mini1 systemd\[1\]: network.service failed.  
network服务启动不了首先保证/etc/sysconfig/network-scripts目录下的ifcfg-xxx（每台机器不一定相同）没有错误（如果你改动过的话），这里的错误指的在更改过程中因为手误敲错字母之类的。  
网上最常见的几种做法如下：

1.和 NetworkManager 服务有冲突，这个好解决，直接关闭 NetworkManger 服务就好了， service NetworkManager stop，并且禁止开机启动 chkconfig NetworkManager off 。之后重启就好了。

2和配置文件的MAC地址不匹配，这个也好解决，使用ip addr（或ifconfig）查看mac地址

\[root@royfans royfans\]\# ip a  
1: lo: <LOOPBACK,UP,LOWER\_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1  
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00  
inet 127.0.0.1/8 scope host lo  
valid\_lft forever preferred\_lft forever  
inet6 ::1/128 scope host  
valid\_lft forever preferred\_lft forever  
2: ens33: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000  
link/ether 00:0c:29:5f:9e:1d brd ff:ff:ff:ff:ff:ff  
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000  
link/ether 52:54:00:67:8e:c3 brd ff:ff:ff:ff:ff:ff  
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0  
valid\_lft forever preferred\_lft forever  
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo\_fast master virbr0 state DOWN qlen 1000  
link/ether 52:54:00:67:8e:c3 brd ff:ff:ff:ff:ff:ff

00:0c:29:5f:9e:1d这个就是MAC地址了，将/etc/sysconfig/network-scripts/ifcfg-xxx中的HWADDR（如果没有就添加上）改成这个MAC地址

3.设定开机启动一个名为NetworkManager-wait-online服务，命令为：  
systemctl enable NetworkManager-wait-online.service

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上面两个是我看到最多的解决方法，但是很遗憾，我的并没有解决。

有查看资料，发现了以下一些方法：

4.查看/etc/sysconfig/network-scripts下，将其余无关的网卡位置文件全删掉，避免不必要的影响，即只留一个以ifcfg开头的文件，

5.将ifcfg-xxx文件中的DEVICE一行注释掉。

6.将ifcfg-xxx中的NAME改为和文件名一致。