CentOS修改网卡名称

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一．问题说明

测试环境中出现的小问题，因为虚拟机之间经常复制来复制去，导致网卡配置这块的不一致现象。

配置文件的信息：

[root@ora10g network-scripts]# catifcfg-eth0

DEVICE="eth0"

NM_CONTROLLED="yes"

ONBOOT=yes

TYPE=Ethernet

BOOTPROTO=none

IPADDR=192.168.1.12

PREFIX=24

GATEWAY=192.168.1.1

DEFROUTE=yes

IPV4_FAILURE_FATAL=no

IPV6INIT=no

NAME="System eth0"

UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03

HWADDR=08:00:27:BD:A6:ED

[root@ora10g network-scripts]# catifcfg-eth1

DEVICE="eth1"

NM_CONTROLLED="yes"

ONBOOT=yes

TYPE=Ethernet

BOOTPROTO=none

IPADDR=192.168.1.13

PREFIX=24

GATEWAY=192.168.1.1

DNS1=8.8.8.8

DEFROUTE=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME="System eth1"

UUID=9c92fad9-6ecb-3e6c-eb4d-8a47c6f50c04

HWADDR=08:00:27:6E:86:10

这里对应的是网卡名称是eth0和eth1.

但是如果我们使用ifconfig 命令查看：

[root@ora10g network-scripts]# ifconfig -a

eth2     Link encap:Ethernet  HWaddr08:00:27:BD:A6:ED

inet addr:192.168.1.12 Bcast:192.168.1.255 Mask:255.255.255.0

inet6 addr: fe80::a00:27ff:febd:a6ed/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500  Metric:1

RX packets:187 errors:0 dropped:0 overruns:0 frame:0

TX packets:59 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:16356 (15.9 KiB)  TXbytes:6116 (5.9 KiB)

eth3     Link encap:Ethernet  HWaddr08:00:27:6E:86:10

inet addr:192.168.1.13 Bcast:192.168.1.255 Mask:255.255.255.0

inet6 addr: fe80::a00:27ff:fe6e:8610/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

RX packets:1357 errors:0 dropped:0 overruns:0 frame:0

TX packets:1099 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:120604 (117.7 KiB)  TXbytes:115937 (113.2 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:16436  Metric:1

RX packets:8 errors:0 dropped:0 overruns:0 frame:0

TX packets:8 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:480 (480.0 b)  TXbytes:480 (480.0 b)

这里的网卡名称是eth2和eth3.

二．解决方法

修改 /etc/udev/rules.d/70-persistent-net.rules文件中的映射关系就可以了。

--修改之前：

[root@ora10g network-scripts]# cat/etc/udev/rules.d/70-persistent-net.rules

# This file was automatically generated bythe /lib/udev/write_net_rules

# program, run by thepersistent-net-generator.rules rules file.

#

# You can modify it, as long as you keepeach rule on a single

# line, and change only the value of theNAME= key.

# PCI device 0x8086:0x100e (e1000)

SUBSYSTEM=="net",ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:d4:ab:67",ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x8086:0x100e (e1000)

SUBSYSTEM=="net",ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:af:2b:37",ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x8086:0x100e (e1000)

SUBSYSTEM=="net",ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:bd:a6:ed",ATTR{dev_id}=="0x0", ATTR{type}=="1",KERNEL=="eth*", NAME="eth2"

# PCI device 0x8086:0x100e (e1000)

SUBSYSTEM=="net",ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:6e:86:10",ATTR{dev_id}=="0x0", ATTR{type}=="1",KERNEL=="eth*", NAME="eth3"

--修改之后：

[root@ora10g network-scripts]# cat/etc/udev/rules.d/70-persistent-net.rules

# This file was automatically generated bythe /lib/udev/write_net_rules

# program, run by thepersistent-net-generator.rules rules file.

#

# You can modify it, as long as you keepeach rule on a single

# line, and change only the value of theNAME= key.

# PCI device 0x8086:0x100e (e1000)

SUBSYSTEM=="net",ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:6E:86:10",ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x8086:0x100e (e1000)

SUBSYSTEM=="net",ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:BD:A6:ED",ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

注意这里的MAC地址要和ifcfg-eth0 保持一致。

然后重启一下网卡和udev：

--ifdown 网卡：

ifdown eth0

ifdown eth1

--重启udev

/etc/init.d/udev-post stop;

/etc/init.d/udev-post start

或者使用：

service udev-post stop
service udev-post start

注意： 对与Oracle linux 是udev-post, 而redhat 是udev

--ifup：

Ifup eth0

Ifup eth1

不过在我的测试中，这2个都没有效果，我是把整个OS都重启了，才生效的。 小知识，随笔记之。