【Centos6】手动配置网卡

在安装时忘记手动勾选链接网络

导致初始状态没有网卡的IP地址

这里参考这篇文章的解决办法：

https://blog.51cto.com/u_13570193/2091655

首先检查是否有E1000模块

modinfo e1000 

下列信息则表示模块存在

[root@localhost ~]# modinfo e1000 
filename:       /lib/modules/2.6.32-754.el6.x86_64/kernel/drivers/net/e1000/e1000.ko
version:        7.3.21-k8-NAPI
license:        GPL
description:    Intel(R) PRO/1000 Network Driver
author:         Intel Corporation, <linux.nics@intel.com>
retpoline:      Y
srcversion:     A911791C4EFC2A93BCFCF6A
alias:          pci:v00008086d00002E6Esv*sd*bc*sc*i*
alias:          pci:v00008086d000010B5sv*sd*bc*sc*i*
alias:          pci:v00008086d00001099sv*sd*bc*sc*i*
alias:          pci:v00008086d0000108Asv*sd*bc*sc*i*
alias:          pci:v00008086d0000107Csv*sd*bc*sc*i*
alias:          pci:v00008086d0000107Bsv*sd*bc*sc*i*
alias:          pci:v00008086d0000107Asv*sd*bc*sc*i*
alias:          pci:v00008086d00001079sv*sd*bc*sc*i*
alias:          pci:v00008086d00001078sv*sd*bc*sc*i*
alias:          pci:v00008086d00001077sv*sd*bc*sc*i*
alias:          pci:v00008086d00001076sv*sd*bc*sc*i*
alias:          pci:v00008086d00001075sv*sd*bc*sc*i*
alias:          pci:v00008086d00001028sv*sd*bc*sc*i*
alias:          pci:v00008086d00001027sv*sd*bc*sc*i*
alias:          pci:v00008086d00001026sv*sd*bc*sc*i*
alias:          pci:v00008086d0000101Esv*sd*bc*sc*i*
alias:          pci:v00008086d0000101Dsv*sd*bc*sc*i*
alias:          pci:v00008086d0000101Asv*sd*bc*sc*i*
alias:          pci:v00008086d00001019sv*sd*bc*sc*i*
alias:          pci:v00008086d00001018sv*sd*bc*sc*i*
alias:          pci:v00008086d00001017sv*sd*bc*sc*i*
alias:          pci:v00008086d00001016sv*sd*bc*sc*i*
alias:          pci:v00008086d00001015sv*sd*bc*sc*i*
alias:          pci:v00008086d00001014sv*sd*bc*sc*i*
alias:          pci:v00008086d00001013sv*sd*bc*sc*i*
alias:          pci:v00008086d00001012sv*sd*bc*sc*i*
alias:          pci:v00008086d00001011sv*sd*bc*sc*i*
alias:          pci:v00008086d00001010sv*sd*bc*sc*i*
alias:          pci:v00008086d0000100Fsv*sd*bc*sc*i*
alias:          pci:v00008086d0000100Esv*sd*bc*sc*i*
alias:          pci:v00008086d0000100Dsv*sd*bc*sc*i*
alias:          pci:v00008086d0000100Csv*sd*bc*sc*i*
alias:          pci:v00008086d00001009sv*sd*bc*sc*i*
alias:          pci:v00008086d00001008sv*sd*bc*sc*i*
alias:          pci:v00008086d00001004sv*sd*bc*sc*i*
alias:          pci:v00008086d00001001sv*sd*bc*sc*i*
alias:          pci:v00008086d00001000sv*sd*bc*sc*i*
depends:        
vermagic:       2.6.32-754.el6.x86_64 SMP mod_unload modversions 
parm:           TxDescriptors:Number of transmit descriptors (array of int)
parm:           RxDescriptors:Number of receive descriptors (array of int)
parm:           Speed:Speed setting (array of int)
parm:           Duplex:Duplex setting (array of int)
parm:           AutoNeg:Advertised auto-negotiation setting (array of int)
parm:           FlowControl:Flow Control setting (array of int)
parm:           XsumRX:Disable or enable Receive Checksum offload (array of int)
parm:           TxIntDelay:Transmit Interrupt Delay (array of int)
parm:           TxAbsIntDelay:Transmit Absolute Interrupt Delay (array of int)
parm:           RxIntDelay:Receive Interrupt Delay (array of int)
parm:           RxAbsIntDelay:Receive Absolute Interrupt Delay (array of int)
parm:           InterruptThrottleRate:Interrupt Throttling Rate (array of int)
parm:           SmartPowerDownEnable:Enable PHY smart power down (array of int)
parm:           KumeranLockLoss:Enable Kumeran lock loss workaround (array of int)
parm:           copybreak:Maximum size of packet that is copied to a new buffer on receive (uint)
parm:           debug:Debug level (0=none,...,16=all) (int)
[root@localhost ~]# 

然后加载模块

# 加载模块
modprobe e1000             

设定开机自动启动模块，我们需要添加文件/etc/modprobe.d/ether.conf，然后编辑

vi /etc/modprobe.d/ether.conf
alias eth0 e1000

虽然内核可以识别网卡的驱动模块，但是有时候网卡并不是处于激活状态，因此需要开启对应的网卡

# 开启网卡eth0
ifup eth0          

手动设定网卡IP，然后ping 网段内其他主机测试

ifconfig eth0 172.18.253.78
ping www.baidu.com

但是手动配置IP会在下次重启的时候恢复默认

重新开启网卡才能连接

ifup eth0          
ifconfig eth0 172.18.253.78

配置网卡的文件实现固定IP

vi /etc/sysconfig/network-scripts/ifcfg-eth0

# 更改和追加内容
DEVICE=eth0
HWADDR=00:0C:29:B5:BD:5A
TYPE=Ethernet
UUID=b4a22c1d-387a-439b-87f2-3e27ba3f6acd
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static

IPADDR=192.168.177.21
NETMASK=255.255.255.0
GATEWAY=192.168.177.2

然后重启网络

# 重启网络服务
/etc/init.d/network restart