装完网卡后，启动机器
[root@xnat1 ~]#more /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 0x14e4:0x1639 (bnx2) (custom name provided by external tool)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:2b:2b:6e:e6:91", ATTR{type}=="1", KERNEL=="eth*", NAME="em4"
# PCI device 0x14e4:0x1639 (bnx2) (custom name provided by external tool)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:2b:2b:6e:e6:8d", ATTR{type}=="1", KERNEL=="eth*", NAME="em2"
# PCI device 0x14e4:0x1639 (bnx2) (custom name provided by external tool)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:2b:2b:6e:e6:8f", ATTR{type}=="1", KERNEL=="eth*", NAME="em3"
# PCI device 0x14e4:0x1639 (bnx2) (custom name provided by external tool)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="84:2b:2b:6e:e6:8b", ATTR{type}=="1", KERNEL=="eth*", NAME="em1"
# PCI device 0x8086:0x105f (e1000e)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:16:31:fe:1c:f9", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
# PCI device 0x8086:0x105f (e1000e)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:16:31:fe:1c:f8", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
文件最后就是新添加的网卡的名字；
然后，vi ifcfg-eth0 添加网络属性。
本文出自 “每天进步1%” 博客，请务必保留此出处http://jackyan.blog.51cto.com/2589874/1708400
原文：http://jackyan.blog.51cto.com/2589874/1708400