实际环境：
我安装了一个centos6.9系统，安装完之后我将原来的网卡移除，再重新添加了一个网卡
导致原来网卡的配置文件和现阶段的网卡mac地址不一样，无法正常启动网卡
问题：
显示 Bringing up interface eth0: Device eth0 does not seem to be present,delaying initialization.
解决方法;
打开文件
[apps@anza tmp]$ vim /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 0x8086:0x100f (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:14:18:2c", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # PCI device 0x8086:0x100f (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:14:18:2e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
修改为如下：
# 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 0x8086:0x100f (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:14:18:2e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
注意查看address和eth*的不同
还要修改eth0配置文件
[root@nginxload ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 HWADDR=00:0C:29:14:18:2e TYPE=Ethernet UUID=f8aa2b9a-ef40-4750-bcf1-c8f4d8c6cec3 ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=dhcp
重启服务：
service network restart
或者重启服务器
reboot