RHEL6的网卡自动改名问题

启动KVM虚拟机，发现eth0变成了eth5.

dmesg |grep eth

发现下面的日志

udev: renamed network interface eth1 to eth4

因为在部署虚拟机时，更改了网卡的MAC地址。

udev有个规则文件，那里边包含了对那些动态dev的处理，当新加网卡时.或换网卡时.这个文件都会有变化。

解决办法：

删除这个文件或注释掉里面的内容即可，重启虚拟机，问题解决。

规则文件为：/etc/udev/rules.d/70-persistent-net.rules

# PCI device 0x10ec:0x8139 (8139cp)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:04:65:ea", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x1af4:0x1000 (virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:27:56:4e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x1af4:0x1000 (virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:e6:88:fd", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"

# PCI device 0x1af4:0x1000 (virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:e9:04:8c", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"

# PCI device 0x1af4:0x1000 (virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:5a:b7:d4", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4"

# PCI device 0x1af4:0x1000 (virtio-pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="52:54:00:55:52:e9", ATTR{type}=="1", KERNEL=="eth*", NAME="eth5"