(转)启动网卡报错（Failed to start LSB: Bring up/down networking ）解决办法总结

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启动网卡报错（Failed to start LSB: Bring up/down networking ）解决办法总结

原文：http://blog.51cto.com/11863547/1905929

http://blog.csdn.net/debimeng/article/details/74296152?utm_source=itdadao&utm_medium=referral

Failed to start LSB: Bring up/down networking

遇到这个错误好几次，所以总结了一下排解的几种方法。

错误记录及排查方法过程：

当我克隆出一台新的centos7的虚拟机的时候，修改了网卡配置文件启动时，报错

[root@centos7~]#systemctlrestartnetwork

Jobfornetwork.servicefailedbecausethecontrolprocessexitedwitherrorcode.See"systemctlstatusnetwork.service"and"journalctl-xe"fordetails.

[root@centos7~]#

按照提示输入systemctl status network.service查看

[root@centos7~]#systemctlstatusnetwork.service

●network.service-LSB:Bringup/downnetworking

Loaded:loaded(/etc/rc.d/init.d/network;bad;vendorpreset:disabled)

Active:failed(Result:exit-code)sinceMon2017-03-1323:24:37CST;16sago

Docs:man:systemd-sysv-generator(8)

Process:2878ExecStart=/etc/rc.d/init.d/networkstart(code=exited,status=1/FAILURE)

Mar1323:24:37centos7network[2878]:RTNETLINKanswers:Fileexists

Mar1323:24:37centos7systemd[1]:network.service:controlprocessexited,code=exitedstatus=1

Mar1323:24:37centos7systemd[1]:FailedtostartLSB:Bringup/downnetworking.

Mar1323:24:37centos7systemd[1]:Unitnetwork.serviceenteredfailedstate.

Mar1323:24:37centos7systemd[1]:network.servicefailed.

无奈去百度了一下，找到解决方法，说是centos7没有70-persistent-net.rules这个文件，所以新克隆的机器需要配置mac地址。

通过ip a命令查看mac地址是00:0c:29:0c:15:49

1 2	`2:eno16777736:<BROADCAST,MULTICAST,UP,LOWER_UP>mtu1500qdiscpfifo_faststateUPqlen1000` `link/ether00:0c:29:0c:15:49brdff:ff:ff:ff:ff:ff`

然后在配置文件中加入这一行（如果存在的话只修改就可以）

1	`HWADDR=00:0c:29:0c:15:49`

重启生效

[root@centos7~]#systemctlrestartnetwork.service

Jobfornetwork.servicefailedbecausethecontrolprocessexitedwitherrorcode.See"systemctlstatusnetwork.service"and"journalctl-xe"fordetails.

[root@centos7~]#

发现依然有这个错误

查看启动日志

Mar1323:51:35centos7systemd:StartingLSB:Bringup/downnetworking...

Mar1323:51:35centos7network:Bringinguploopbackinterface:Couldnotloadfile‘/etc/sysconfig/network-scripts/ifcfg-lo‘

Mar1323:51:35centos7network:Couldnotloadfile‘/etc/sysconfig/network-scripts/ifcfg-lo‘

Mar1323:51:35centos7network:[OK]

Mar1323:51:36centos7network:Bringingupinterfaceeth0:Error:Connectionactivationfailed:Nosuitabledevicefoundforthisconnection.

Mar1323:51:36centos7network:[FAILED]

Mar1323:51:36centos7network:RTNETLINKanswers:Fileexists

Mar1323:51:36centos7systemd:network.service:controlprocessexited,code=exitedstatus=1

Mar1323:51:36centos7systemd:FailedtostartLSB:Bringup/downnetworking.

Mar1323:51:36centos7systemd:Unitnetwork.serviceenteredfailedstate.

Mar1323:51:36centos7systemd:network.servicefailed.

发现无法加载/etc/sysconfig/network-scripts/ifcfg-lo文件

给NetworkManager-wait-online服务设置开机自启动

1	`systemctlenableNetworkManager-wait-online.service`

然后重启网卡

[root@centos7~]#systemctlrestartnetwork

Jobfornetwork.servicefailedbecausethecontrolprocessexitedwitherrorcode.See"systemctlstatusnetwork.service"and"journalctl-xe"fordetails.

[root@centos7~]#

查看日志

1	`Couldnotloadfile‘/etc/sysconfig/network-scripts/ifcfg-lo‘`

这个错误依然存在

1 2	`systemctlstopNetworkManager` `systemctldisableNetworkManager`

将NetworkManager关闭，然后重启网卡，查看日志

Mar1400:31:27centos7systemd:StartingLSB:Bringup/downnetworking...

Mar1400:31:27centos7network:Bringinguploopbackinterface:[OK]

Mar1400:31:28centos7network:Bringingupinterfaceeth0:ERROR:[/etc/sysconfig/network-scripts/ifup-eth]Deviceeth0doesnotseemtobepresent,delayinginitialization.

Mar1400:31:28centos7/etc/sysconfig/network-scripts/ifup-eth:Deviceeth0doesnotseemtobepresent,delayinginitialization.

Mar1400:31:28centos7network:[FAILED]

Mar1400:31:28centos7network:RTNETLINKanswers:Fileexists

Mar1400:31:28centos7systemd:network.service:controlprocessexited,code=exitedstatus=1

Mar1400:31:28centos7systemd:FailedtostartLSB:Bringup/downnetworking.

Mar1400:31:28centos7systemd:Unitnetwork.serviceenteredfailedstate.

Mar1400:31:28centos7systemd:network.servicefailed.

Mar1400:33:42centos7dhclient[3813]:DHCPREQUESToneno16777736to10.0.0.254port67(xid=0x4d17f187)

Mar1400:33:42centos7dhclient[3813]:DHCPACKfrom10.0.0.254(xid=0x4d17f187)

那个错误已经不见了，但是重启网卡

[root@centos7~]#systemctlrestartnetwork

Jobfornetwork.servicefailedbecausethecontrolprocessexitedwitherrorcode.See"systemctlstatusnetwork.service"and"journalctl-xe"fordetails.

[root@centos7~]#

依然是这个错误，然后我又重新百度，说虚拟机设置中的两个连接选项（已连接和启动时连接）没有选择也会报同样的错，但是我的已经连接，问题依然存在，到底是因为什么呢？再次查找方法。

结果这次认真看了日志报错后发现是说eth0这个文件找不到

1 2	`Mar1400:36:39centos7network:Bringingupinterfaceeth0:ERROR:[/etc/sysconfig/network-scripts/ifup-eth]Deviceeth0doesnotseemtobepresent,delayinginitialization.` `Mar1400:36:39centos7/etc/sysconfig/network-scripts/ifup-eth:Deviceeth0doesnotseemtobepresent,delayinginitialization.`

原来是之前做优化的时候将7的网卡名改成了eth0（众所周知7的网卡名是eno后面随机一串数字），生成菜单时没有生效，那么在此生效一下

注意网卡配置名是已经修改成eth0以后执行下面操作，一共修改的地方有三处，第一处网卡名：/etc/sysconfig/network-scripts/ifcfg-eth0，第二处配置文件里面：NAME=eth0，第三处也是配置文件里面：DEVICE=eth0

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

[root@centos7~]#cat/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=128Mrd.lvm.lv=centos/rootrhgbquietnet.ifnames=0biosdevname=0"

GRUB_DISABLE_RECOVERY="true"

[root@centos7~]#

生成菜单

[root@centos7~]#grub2-mkconfig-o/boot/grub2/grub.cfg

Generatinggrubconfigurationfile...

Foundlinuximage:/boot/vmlinuz-3.10.0-327.el7.x86_64

Foundinitrdimage:/boot/initramfs-3.10.0-327.el7.x86_64.img

Foundlinuximage:/boot/vmlinuz-0-rescue-8058723e5e754d3aabc51842d9108e3b

Foundinitrdimage:/boot/initramfs-0-rescue-8058723e5e754d3aabc51842d9108e3b.img

done

[root@centos7~]#

最后reboot重启

最后登录后正常

(转)启动网卡报错（Failed to start LSB: Bring up/down networking ）解决办法总结

原文地址：https://www.cnblogs.com/liujiacai/p/8116755.html

(转)启动网卡报错（Failed to start LSB: Bring up/down networking ）解决办法总结

启动网卡报错（Failed to start LSB: Bring up/down networking ）解决办法总结

Failed to start LSB: Bring up/down networking

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