CentOS7 网络不能启动报错： Failed to start LSB: Bring up/down的问题

解决办法一

ip addr
查看eth0网卡地址值
获取新的mac地址。接下来就剩下修改ifcfg-eth0文件了，只修改HWADDR就可以了。
接下来执行service network restart

TYPE=”Ethernet”
BOOTPROTO=dhcp
DEFROUTE=”yes”
IPV4_FAILURE_FATAL=”no”
IPV6INIT=”yes”
IPV6_AUTOCONF=”yes”
IPV6_DEFROUTE=”yes”
IPV6_FAILURE_FATAL=”no”
NAME=”eth0”
UUID=”7431ccd8-03a3-4717-b141-119851579162”
DEVICE=”eth0”
ONBOOT=”yes”
HWADDR=08:00:27:8B:CB:E5
PEERDNS=yes
PEERROUTES=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes

修改/etc/sysconfig/grub，添加net.ifnames=0 biosdevname=0

vi /etc/sysconfig/grub
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=” $(sed 's, release .*$ ,,g’ /etc/system-release)”
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT=”console”
GRUB_CMDLINE_LINUX=”crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap net.ifnames=0 biosdevname=0 rhgb quiet”
GRUB_DISABLE_RECOVERY=”true”
（3）手动生成70-persistent-net.rules以及其他方法
查看接口的MAC地址

ip link show

生成文件

vi /etc/udev/rules.d/70-persistent-net.rules

SUBSYSTEM==”net”, ACTION==”add”, DRIVERS==”?“, ATTR{address}==”00:0c:29:28:ac:54”, ATTR{type}==”1”, KERNEL==”eth“, NAME=”eth0”

或grub2-mkconfig -o /boot/grub2/grub.cfg

#这个没有试过，有兴趣的可以自己试试

重启机器:

reboot

解决办法二

如果还是启动失败查看是否有如下错误信息
Nov 23 22:09:07 hdcoe02 network[597]: Bringing up loopback interface: Could not load file ‘/etc/sysconfig/network-scripts/ifcfg-lo’
Nov 23 22:09:07 hdcoe02 network[597]: Could not load file ‘/etc/sysconfig/network-scripts/ifcfg-lo’
Nov 23 22:09:08 hdcoe02 network[597]: Could not load file ‘/etc/sysconfig/network-scripts/ifcfg-lo’
Nov 23 22:09:08 hdcoe02 network[597]: Could not load file ‘/etc/sysconfig/network-scripts/ifcfg-lo’ Nov 23 22:09:08 hdcoe02 network[597]: [ OK ]
Nov 23 22:09:08 hdcoe02 network[597]: Bringing up interface enp0s25: Error: Connection activation failed: Connection ‘enp0s25’ is not available on the device enp0s25 at this time.
设定开机启动一个名为NetworkManager-wait-online服务，命令为：
systemctl enable NetworkManager-wait-online.service

解决办法三

我也是上面方法都测试完了一直不成功，最后发现时因为在VMware 虚拟机里面的系统右上角显示的连接都没有连接上，虽然报错都一样，最后我在虚拟机设置里面将原来的网络适配器删掉，重新建了一个新的网络适配器，这次进去，显示连接成功，再用上面的方法，问题解决。

解决办法四

[vmware workstation ]Failed to start LSB: Bring up/down networking
11月 05 15:30:10 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
11月 05 15:30:10 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
但这不是你配置的问题，是虚拟机傻了
1，打开VMware安装包
2，选择修复
重启虚拟机OK