Linux 网卡配置eth1修改为eth0

在测试或生产环境中，经常会遇到克隆的服务器（虚拟机），网卡配置经常也会克隆为eth1，下面讲如何将网卡配置修改为eth0（eth1网卡也可以正常使用，但是有些强逼症的同学看不习惯）；

配置环境：RHEL6

目录

步骤一：更改服务器的网卡名，将克隆的服务器网卡配置修改为eth0；

步骤二：修改网卡名（ifcfg-eth1修改为ifcfg-eth0）

步骤三：修改网卡配置（DEVICE=eth1修改为DEVICE=eth0）

步骤四：重启，重新加载网卡信息

---

步骤一：更改服务器的网卡名，将克隆的服务器网卡配置修改为eth0；

[root@localhost ~]# ip a
1: lo:  mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth1:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:bc:7a:aa brd ff:ff:ff:ff:ff:ff
    inet 192.168.50.44/27 brd 192.168.50.63 scope global eth1
    inet6 fe80::20c:29ff:febc:7aaa/64 scope link
       valid_lft forever preferred_lft forever
3: pan0:  mtu 1500 qdisc noop state DOWN
    link/ether 9e:62:69:38:2f:f0 brd ff:ff:ff:ff:ff:ff

网卡MAC地址记录（唯一）：00:0c:29:bc:7a:aa，稍后修改；

[root@localhost ~]# 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 0x8086:0x100f (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:7d:e0:e9", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x8086:0x100f (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:bc:7a:aa", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

找到对应MAC地址的网卡配置，修改为eth0，其他网卡配置注释掉，如下：

[root@localhost ~]# 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:29:7d:e0:e9", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x8086:0x100f (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:bc:7a:aa", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

步骤二：修改网卡名（ifcfg-eth1修改为ifcfg-eth0）

mv /etc/sysconfig/network-scripts/ifcfg-eth1 /etc/sysconfig/network-scripts/ifcfg-eth0

步骤三：修改网卡配置（DEVICE=eth1修改为DEVICE=eth0）

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

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=dhcp
#IPADDR=192.168.2.30
#NETMAST=255.255.255.0
#GATEWAY=192.168.2.254

步骤四：重启，重新加载网卡信息

[root@localhost ~]# /etc/init.d/network restart
关闭环回接口：                                             [确定]
弹出环回接口：                                             [确定]
弹出界面 eth0： 活跃连接状态：激活中
活跃连接路径：/org/freedesktop/NetworkManager/ActiveConnection/3
状态：激活中
状态：激活的
连接被激活
                                                           [确定]
[root@localhost ~]# reboot

重启完成后观察已经修改为eth0，恭喜完成修改-z-

[root@localhost ~]# ip a
1: lo:  mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:bc:7a:aa brd ff:ff:ff:ff:ff:ff
    inet 192.168.50.44/27 brd 192.168.50.63 scope global eth0
    inet6 fe80::20c:29ff:febc:7aaa/64 scope link
       valid_lft forever preferred_lft forever
3: pan0:  mtu 1500 qdisc noop state DOWN
    link/ether 32:ac:93:52:29:2f brd ff:ff:ff:ff:ff:ff