日常工作问题解决：使用vmvare克隆centos6虚拟机造成无eth0的解决办法

目录

• This file was automatically generated by the /lib/udev/write_net_rules
• program, run by the persistent-net-generator.rules rules file.
• null
• 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 0x8086:0x100f (e1000)
• PCI device 0x8086:0x100f (e1000)

一、问题描述

样本虚拟机配置有两张网卡，eth0、eth1，使用vmvare克隆虚拟机后，复制的虚拟机，没有网卡eth0，eth1，而是有eth2、eth3，如下所示：

二、原因分析

复制系统中网卡的mac地址已经变了，但是/etc/udev/rules.d/70-persistent-net.rules中仍然保留了老网卡的信息，新网卡则会从eht1网上增加，被识别为eth2，eth3

三、解决办法：

概括步骤:

1.检查并修改 /etc/udev/rules.d/70-persistent-net.rules 文件中网卡名并重启系统

2.modprobe -r e1000 卸载网卡模块

3.modprobe e1000 重新加载网卡模块

4.修改/etc/sysconfig/network-scrcipts中网卡的配置文件（使其格式为ifcfg-网卡名）

5.重启网卡服务service network restart

具体步骤如下：

1、检查并修改 /etc/udev/rules.d/70-persistent-net.rules 文件中网卡名

删除原来错误的eth0和eth1配置信息，并修改NAME="eth2" 为 NAME="eth0"，NAME="eth3"为NAME="eth1"，如下所示

[root@localhost Desktop]# vim /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 0x8086:0x100f (e1000)
SUBSYSTEM"net", ACTION"add", DRIVERS"?*", ATTR{address}"00:0c:29:b5:69:fc", ATTR{type}"1", KERNEL"eth*", NAME="eth0"
PCI device 0x8086:0x100f (e1000)
SUBSYSTEM"net", ACTION"add", DRIVERS"?*", ATTR{address}"00:0c:29:b5:69:06", ATTR{type}"1", KERNEL"eth*", NAME="eth1"

reboot重启系统，使配置文件生效

2、modprobe -r e1000卸载网卡模块

[root@localhost Desktop]# modprobe -r e1000

3、modprobe e1000重新加载网卡模块

[root@localhost Desktop]# modprobe e1000

4、修改/etc/sysconfig/network-scrcipts中网卡的配置文件

修改eth0、eth1配置文件与70-persistent-net.rules中的mac地址相对应：

[root@localhost Desktop]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
HWADDR=00:0c:29:b5:69:fc #修改为正确的mac地址
TYPE=Ethernet
UUID=9dcce425-39a0-477e-afa2-bf1a2d5615af
ONBOOT=yes # 修改为开机启动
NM_CONTROLLED=yes
BOOTPROTO=dhcp
[root@localhost Desktop]# vim /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1

HWADDR=00:0c:29:b5:69:06

TYPE=Ethernet

UUID=99037241-ffe5-4de7-8ca0-64ae19f30bd5

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=dhcp

5、重启网络服务

[root@localhost Desktop]# service network restart # 重启网络服务
Shutting down interface eth0:                              [  OK  ]
Shutting down interface eth1:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:  Active connection state: activating
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/9
state: activated
Connection activated
                                                           [  OK  ]

查看网络信息

[root@localhost Desktop]# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:0C:29:B5:69:FC  
          inet addr:192.168.57.129  Bcast:192.168.57.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:feb5:69fc/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:272 errors:0 dropped:0 overruns:0 frame:0
          TX packets:178 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:17170 (16.7 KiB)  TX bytes:14884 (14.5 KiB)
eth1      Link encap:Ethernet  HWaddr 00:0C:29:B5:69:06

inet6 addr: fe80::20c:29ff:feb5:6906/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:54 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:0 (0.0 b)  TX bytes:17700 (17.2 KiB)
lo        Link encap:Local Loopback

inet addr:127.0.0.1  Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING  MTU:65536  Metric:1

RX packets:16 errors:0 dropped:0 overruns:0 frame:0

TX packets:16 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:960 (960.0 b)  TX bytes:960 (960.0 b)

发现修改成功，完毕

---

END
2019-10-23 00:01:32