（1）确保udev-post 启动

# chkconfig --list udev-post

udev-post      0:关闭1:启用2:启用3:启用4:启用5:启用6:关闭

# /etc/init.d/udev-post start

（2）把网卡配置全删除（删除70-persistent-net.rules文件），重启让系统重新分配

# cd /etc/udev/rules.d

[root@xjuCentOS rules.d]# rm -rf 70-persistent-net.rules

[root@xjuCentOS rules.d]# cd /etc/sysconfig/network-scripts

[root@xjuCentOS network-scripts]# rm -rf ifcfg-eth*

[root@xjuCentOS network-scripts]# cat ifcfg-eth0

TYPE=Ethernet

BOOTPROTO=none

IPADDR=10.238.208.10

PREFIX=25

GATEWAY=10.238.208.1

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME=eth0

UUID=9573a563-bfb5-478a-8e03-04dbba7c098e

ONBOOT=yes

LAST_CONNECT=1431947250