rm /etc/udev/rules.d/70-persistent-net.rules
有eth1的话，rm /etc/sysconfig/network-scripts/ifcfg-eth1
vi /etc/sysconfig/network-scripts/ifcfg-eth0，只需要2行：
DEVICE=eth0
ONBOOT=yes
reboot

或者修改 /etc/udev/rules.d/70-persistent-net.rules mac地址为最新