Linux 下修改网卡接口名

Linux下修改网卡接口名

by:授客 QQ：1033553122

(测试环境：CentOS-6.0-x86_64-bin-DVD1.iso+Vmware)

作用

可以用于解决类似如下Device not found的问题：

# ifconfig eth1

eth1: error fetching interface information: Device not found

 

例1：把网卡接口名从eth0改为eth1

#修改网卡接口名之前的相关信息如下

# ifconfig eth0

eth0      Link encap:Ethernet  HWaddr 00:0C:29:F3:8B:8A

inet addr:172.25.75.4  Bcast:172.25.75.255  Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fef3:8b8a/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX packets:472 errors:0 dropped:0 overruns:0 frame:0

TX packets:95 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:42666 (41.6 KiB)  TX bytes:11536 (11.2 KiB)

# ifconfig -a

eth0      Link encap:Ethernet  HWaddr 00:0C:29:F3:8B:8A

inet addr:172.25.75.4  Bcast:172.25.75.255  Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fef3:8b8a/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX packets:503 errors:0 dropped:0 overruns:0 frame:0

TX packets:106 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:46425 (45.3 KiB)  TX bytes:13230 (12.9 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:16436  Metric:1

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

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

collisions:0 txqueuelen:0

RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

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

[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) (custom name provided by external tool)

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:f3:8b:8a", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

 

步骤1.修改网卡接口配置文件

#把eth0对应的配置文件ifcfg-eth0重命名为ifcfg-eth1--如要设置网卡接口名为ethN,则重命名为ifcfg-ethN

# cd
/etc/sysconfig/network-scripts/

# mv ifcfg-eth0
ifcfg-eth1

说明：如果网卡接口名为ethN,则对应的配置文件为ifcfg-ethN

#修改ifcfg-eth1配置文件，把DEVICE="eth0"改成DEVICE="eth1"

# vi ifcfg-eth1

DEVICE="eth1"--如要设置网卡接口名为ethN,则此处DEVICE="ethN"

BOOTPROTO=static

HADDR="00:0c:29:f3:8b:8a"

IPADDR=172.25.75.4

NETMASK=255.255.255.0

NETWORK=172.25.75.0

NM_CONTROLLED="yes"

ONBOOT="yes"

GATEWAY=172.25.75.254

步骤2.修改70-persistent-net.rules配置文件

修改70-persistent-net.rules文件，找到包含原始MAC地址的记录，把NAME="eth0"改成NAME="eth1"

# vi  /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) (custom name provided by external tool)

SUBSYSTEM=="net",
ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:f3:8b:8a",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
--如要设置网卡接口名为ethN,则此处为NAME="ethN"

注意：

1.如果存在多条仅NAME的值不一样的记录，则删除多余的记录，仅保留一条记录

2.如果有对网卡MAC地址进行修改过，即网卡mac地址并非原始mac地址，则推荐步骤2之前进行如下操作：

70-persistent-net.rules文件：

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

#
reboot

说明：重启后，系统自动重新生成70-persistent-net.rules文件，里面记录中的包含的MAC地址为对应网卡的原始MAC地址

步骤3.重启系统

# reboot

注意：此处# service network
restart
命令不起作用，必须重启

步骤4.验证是否已经修改

如下，网卡接口名已经变成eth1

[root@localhost ~]#
ifconfig eth1

eth1      Link
encap:Ethernet  HWaddr
00:0C:29:F3:8B:8A

inet addr:172.25.75.4 
Bcast:172.25.75.255 
Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fef3:8b8a/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX
packets:45 errors:0 dropped:0 overruns:0 frame:0

TX packets:53 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:4693 (4.5 KiB)  TX bytes:7766 (7.5
KiB)

[root@localhost ~]#
ifconfig -a

eth1 
    Link
encap:Ethernet  HWaddr
00:0C:29:F3:8B:8A

inet addr:172.25.75.4 
Bcast:172.25.75.255 
Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fef3:8b8a/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX
packets:73 errors:0 dropped:0 overruns:0 frame:0

TX packets:60 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:7091 (6.9 KiB)  TX bytes:9004 (8.7
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:16436  Metric:1

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

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

collisions:0 txqueuelen:0

RX bytes:0 (0.0 b)  TX bytes:0 (0.0
b)

# 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) (custom name provided by external tool)

SUBSYSTEM=="net",
ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:f3:8b:8a",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"