虛擬機器克隆時，是將原來機器所有資訊都克隆過去，包括相應網絡卡裝置mac地址的漫畫資訊，這個需要修改的；
同時一下網路規則刪除也使用於Linux中eth0和eth1之間的互相修復
【環境】VMware、centros、克隆
對虛擬機器中的一臺centros機器克隆完成之後，針對新建伺服器網路設定包括以下幾步：
修改相應的配置

1、修改主機名–需要修改檔案

/etc/hosts
/etc/sysconfig/network

2、修改網絡卡配置

cat/etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
TYPE=Ethernet
ONBOOT
 
=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=172.17.40.247
NETMASK=255.255.254.0
GATEWAY=172.17.40.1

—–其中DEVICE和ifcfg-ethx根據實際修改
可以通過ip addr 檢視哪個網絡卡裝置是ok的 （檢視網絡卡狀態 也可以使用ifconfig -a 或者ethtool ethx ）

3、刪除網路規則，裡面有相應的mac資訊，刪除重啟伺服器會根據ifcfg-ethx來重新生成

/etc/udev/rules.d/70-persistent-net.rules

[root@weijin-dev0001 etc]# cat 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 0x15ad:0x07b0 (vmxnet3)
 

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:93:7a:ec", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x15ad:0x07b0 (vmxnet3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:93:31:f4", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
[root@weijin-dev0001 etc]# cat /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 0x15ad:0x07b0 (vmxnet3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:93:7a:ec", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x15ad:0x07b0 (vmxnet3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:93:31:f4", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

找到上面ok的網絡卡裝置，在70-persistent-net.rules中找到對應的PCI device資訊，將此網路規則刪除，最後重啟伺服器，在驗證，是否ok

網絡卡啟動常用命令：

service network restart
ifup eth0
ifdown eth0

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