Centos 6 配置eth0 提示Device does not seem to be present
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]
解决方案1：
[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 ~]#
解决方案2：
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
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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 /etc/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
解决方案3：比方案1更深入一些
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~！
