Centos 配置eth0 提示Device does not seem to be present

一.故障現象:
[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]
 
解決辦法:
[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.另外一種方法
形成這樣的緣由,是由於在虛擬機(Vmware)中移動了Centos系統對應的文件,致使從新配置時,網卡的MAC地址變了,輸入ifconfig -a,找不到eth0
·······
 
安裝完一個centos虛擬機,又拷貝一份,開機後網卡沒法正常啓動,報錯:Device eth0 does not seem to be present, 
delaying initialization

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

vim 
sysconfig/network-scripts/ifcfg-eth1

修改DEVICE="eth0" 
爲DEVICE="eth1"
 
可刪掉uuid、物理地址

而後重啓啓動網卡嘗試下
 
三.比第一種更深刻一點
 
 

故障前的操做:node

DELL刀片裝的是CentOS6.3的操做系統,網卡識別的是em1和em2,因爲工做須要作了槽位調整,並啓動了刀片vim

 

故障現象:centos

啓動後網絡不通,經過iDRAC登陸後route查看缺省路由正常;網絡

重啓網絡服務:oop

[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]字體

 

分析問題和解決:ui

以前在別的文章中咱們提過70-persistent-net.rules文件,因此看了一下:操作系統

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

# 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.ip

# 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"

發現NAME的名稱不正確,依次將上述紅色字體中的eth0改成em1,eth1改成em2;

*切記:網卡編號由MAC地址大小決定,MAC越小網卡編號越小;

以下:

…………

# 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

………………

問題解決~!

相關文章
相關標籤/搜索