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  • Centos 配置eth0 提示Device does not seem to be present

    一.故障现象:
    [root@c1node01 ~]# service network restart
    Shutting down loopback insterface:                                                       [   OK  ]
    Bringing up loopback insterface:                                                            [   OK  ]
    Bringing up interface eth0:  Device eth0 does not seem to be present,delaying initialization.                    [FAILED]
     
    解决办法:
    [root@c1node01 ~]# rm -rf /etc/udev/rules.d/70-persistent-net.rules
    [root@c1node01 ~]# reboot ………………
    [root@c1node01 ~]# service network restart
    Shutting down loopback insterface:                                                         [   OK   ]
    Bringing up loopback insterface:                                                              [   OK   ]
    Bringing up interface eth0:                                                                     [   OK   ]
    [root@c1node01 ~]#
     
    二.另一种方法
    造成这样的原因,是因为在虚拟机(Vmware)中移动了Centos系统对应的文件,导致重新配置时,网卡的MAC地址变了,输入ifconfig -a,找不到eth0
    ·······
     
    安装完一个centos虚拟机,又拷贝一份,开机后网卡无法正常启动,报错:Device eth0 does not seem to be present, 
    delaying initialization

    解决:# mv /etc/sysconfig/network-scripts/ifcfg-eth0 
    sysconfig/network-scripts/ifcfg-eth1

    vim 
    sysconfig/network-scripts/ifcfg-eth1

    修改DEVICE="eth0" 
    为DEVICE="eth1"
     
    可删掉uuid、物理地址

    然后重启启动网卡尝试下
     
    三.比第一种更深入一点
     
     

    故障前的操作:

    DELL刀片装的是CentOS6.3的操作系统,网卡识别的是em1和em2,由于工作需要做了槽位调整,并启动了刀片

    故障现象:

    启动后网络不通,通过iDRAC登录后route查看缺省路由正常;

    重启网络服务:

    [root@nodeA ~]# service network restart Shutting down loopback insterface: [ OK ] Bringing up loopback insterface: [ OK ] Bringing up interface em1: Device em1 does not seem to be present,delaying initialization. [FAILED]

    分析问题和解决:

    之前在别的文章中我们提过70-persistent-net.rules文件,所以看了一下:

    [root@nodeA ~]# vi /etc/udev/rules.d/70-persistent-net.rules

    # This file was automatically generated by the /lib/udev/write_net_rules # program, run by the persistent-net-generator.rules rules file. # # You can modify it, as long as you keep each rule on a single # line, and change only the value of the NAME= key.

    # PCI device 0x14e4:0x163a (bnx2) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="24:b6:fd:ab:76:1e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

    # PCI device 0x14e4:0x163a (bnx2) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="24:b6:fd:ab:76:1c", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

    发现NAME的名称不正确,依次将上述红色字体中的eth0改为em1,eth1改为em2;

    *切记:网卡编号由MAC地址大小决定,MAC越小网卡编号越小;

    如下:

    …………

    # PCI device 0x14e4:0x163a (bnx2)

    SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="24:b6:fd:ab:76:1e", ATTR{type}=="1", KERNEL=="eth*", NAME="em2"

    # PCI device 0x14e4:0x163a (bnx2) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="24:b6:fd:ab:76:1c", ATTR{type}=="1", KERNEL=="eth*", NAME="em1"

    保存退出~!

    [root@nodeA ~]#reboot

    ………………

    问题解决~!

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  • 原文地址:https://www.cnblogs.com/sunshineyang/p/6681035.html
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