CentOS6 虚拟机迁移后网卡名更改问题解决

旧城等待， 2022-05-21 12:10 260阅读 0赞

实验过程中，我们经常需要复制虚拟机，以模仿生产过程中同等配置的条件。  
  
    但无论是初次打开，选择"我已复制该虚拟机“也好，还是在虚拟机设置>网络适配器>高级中重新生成Mac地址，开机后选择”我已移动该虚拟机“也罢。开机后查询IP时，我们都会很遗憾的发现，网卡的名字，不一样了。  
  
    这是因为原Mac地址占用旧网卡，新Mac地址只能使用新的网卡名称。复制虚拟机为了不与原虚拟机冲突，也是生成了新的Mac地址。  
  
  
\[root@CentOS6 ~\]\# ifconfig   
eth2      Link encap:Ethernet  HWaddr 00:50:56:22:C9:22    
          inet addr:192.168.234.187  Bcast:192.168.234.255  Mask:255.255.255.0   
          inet6 addr: fe80::250:56ff:fe22:c922/64 Scope:Link   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1    
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:1000    
          RX bytes:806 (806.0 b)  TX bytes:1152 (1.1 KiB)   
eth3      Link encap:Ethernet  HWaddr 00:50:56:3A:FD:74    
          inet addr:172.17.251.174  Bcast:172.17.255.255  Mask:255.255.0.0   
          inet6 addr: fe80::250:56ff:fe3a:fd74/64 Scope:Link   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1   
          RX packets:2565 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:61 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:1000    
          RX bytes:243027 (237.3 KiB)  TX bytes:9974 (9.7 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:4 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:0    
          RX bytes:240 (240.0 b)  TX bytes:240 (240.0 b)  
  
  
    虽然不影响使用，但怎么看都不舒服啊。而且有些实验中网卡名不统一也只有麻烦。正所谓没有标准化就很难进行自动化管理。  
那么，如何更改迁移后的虚拟机的网卡名呢？

(1).修改配置文件/etc/udev/rules.d/70-persistent-net.rules

\[root@centos6 ~\]\# vim /etc/udev/rules.d/70-persistent-net.rules

(2) 删除原Mac，更改NAME值，搞定。改好后是这个样子。

\[root@centos6 rules.d\]\# 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\}=="00:50:56:22:c9:22", ATTR\{type\}=="1", KERNEL=="eth\*", NAME="eth0"  
\# PCI device 0x8086:0x100f (e1000)   
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?\*", ATTR\{address\}=="00:50:56:3a:fd:74", ATTR\{type\}=="1", KERNEL=="eth\*", NAME="eth1"  
~  
  
  
(3).重启或重装网卡驱动，使配置文件生效  
查看网卡驱动名：ethtool -i eth2或dmesg|grep -i eth  
卸载网卡驱动：modprobe -r e1000 或rmmod e1000  
装载网卡驱动：modprobe e1000  
\[root@centos6 rules.d\]\# dmesg|grep -i eth   
e1000 0000:02:01.0: eth0: (PCI:66MHz:32-bit) 00:50:56:3a:fd:74   
e1000 0000:02:01.0: eth0: Intel(R) PRO/1000 Network Connection   
e1000 0000:02:02.0: eth1: (PCI:66MHz:32-bit) 00:50:56:22:c9:22   
e1000 0000:02:02.0: eth1: Intel(R) PRO/1000 Network Connection   
udev: renamed network interface eth1 to eth2   
udev: renamed network interface eth0 to eth3   
e1000: eth3 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None   
8021q: adding VLAN 0 to HW filter on device eth3   
e1000: eth2 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None   
8021q: adding VLAN 0 to HW filter on device eth2   
eth2: no IPv6 routers present   
eth3: no IPv6 routers present   
\#阿拉的网卡驱动只有e1000一块，所以阿拉卸载一块就够了。有的网卡名不一样，要分别卸载   
\[root@centos6 rules.d\]\# rmmod e1000   
\#再用ifconfig查看会发现原网卡信息不见了。（阿拉这一步就不粘代码了）   
\#装载网卡驱动   
\[root@centos6 rules.d\]\# modprobe e1000   
\#再次查看，修改成功   
\[root@centos6 ~\]\# ifconfig   
eth0      Link encap:Ethernet  HWaddr 00:50:56:22:C9:22    
          inet addr:192.168.234.187  Bcast:192.168.234.255  Mask:255.255.255.0   
          inet6 addr: fe80::250:56ff:fe22:c922/64 Scope:Link   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1   
          RX packets:3 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:1000    
          RX bytes:746 (746.0 b)  TX bytes:1152 (1.1 KiB)   
    
eth1      Link encap:Ethernet  HWaddr 00:50:56:3A:FD:74    
          inet addr:172.17.251.174  Bcast:172.17.255.255  Mask:255.255.0.0   
          inet6 addr: fe80::250:56ff:fe3a:fd74/64 Scope:Link   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1   
          RX packets:475 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:50 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:1000    
          RX bytes:48665 (47.5 KiB)  TX bytes:7289 (7.1 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:80 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:80 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:0

RX bytes:6148 (6.0 KiB)  TX bytes:6148 (6.0 KiB)

**本文转自:**

**https://www.linuxidc.com/Linux/2017-09/146746.htm**