由于换了主板，集成网卡mac地址变了，70-persistent-net.rules中仍然保留了老网卡的内容，新网卡则被识别为eth1。
将表示老网卡的行注释掉，然后将表示新网卡的行中eth1改成eth0，在把网卡配置文件ifcfg-eth0的mac地址改成新网卡mac地址，重启。

操作：

[root@localhost ~]# vi /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 0x1022:0x2000 (pcnet32) (custom name provided by external tool)
# SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:50:52:46", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:46:6f:cd", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"
BOOTPROTO="static"
HWADDR="00:0C:29:46:6f:cd"
IPADDR="192.168.1.239"
NETMASK="255.255.255.0"
NETWORK="192.168.1.0"
ONBOOT="yes"