linux 修改网卡 mac地址命令,Centos系统下查看和修改网卡Mac地址(附ifconfig命令格式)…

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本文将为大家详细的介绍centos系统修改网卡Mac地址的方法,具体内容如下:

在文件/etc/sysconfig/network-scripts/ifcfg-eth0 中增加一行类似如下

MACADDR=00:04:AC:33:1C:3B

答:MAC地址是网卡的物理地址,其实在Linux下也可更改MAC地址:

1)闭网卡设备

/sbin/ifconfig eth0 down

2)修改MAC地址

/sbin/ifconfig eth0 hw ether MAC地址

3)重启网卡

/sbin/ifconfig eth0 up

Red Hat Linux下如何修改网卡MAC地址

OS版本:Red Hat Enterprise Linux AS4

核心:Kernel 2.6.9-42

网上有很多关于linux下修改MAC地址的方法,大多依葫芦画瓢,似乎都没验证过,达不到修改的目的。

经过我的详细测试,最终成功解决了这个问题。

误区一:

#ifconfig eth0 down /*禁掉eth0网卡,这里以eth0网卡为例*/

#ifconfig eth0 hw ether 00:AA:BB:CC:DD:EE /*修改eth0网卡的MAC地址*/

#ifconfig eth0 up /*重新启动eth0网卡*/

然后重新启动主机。

结论:按照这种方法修改MAC地址,重新启动主机系统后,MAC地址会自动还原。

误区二:

#ifconfig eth0 down

#cd /etc/sysconfig/network-scripts

#vi ifcfg-eth0

修改其中的”HWADDR=xx:xx:xx:xx:xx:xx”

#ifconfig eth0 up

#service network start

结论:按照这种方法修改MAC地址后将无法启用网络,会出现如下提示:

“Bringing up interface eth0: Device eth0 has different MAC address than expected,ignoring.”

那么,在linux环境下如何保证修改后的MAC地址永久保存呢?正确的步骤如下:

#ifconfig eth0 down

#cd /etc/sysconfig/network-scripts

#vi ifcfg-eth0

修改其中的”HWADDR=xx:xx:xx:xx:xx:xx”为”MACADDR=xx:xx:xx:xx:xx:xx”

#ifconfig eth0 up

#service network start

关键词:HWADDR和MACADDR是有区别的。

最后附ifconfig命令格式:

ifconfig –help

Usage:

ifconfig [-a] [-v] [-s] [[]

]

[add

[/]]

[del

[/]]

[[-]broadcast [

]] [[-]pointopoint [
]]

[netmask

] [dstaddr
] [tunnel
]

[outfill ] [keepalive ]

[hw

] [metric ] [mtu ]

[[-]trailers] [[-]arp] [[-]allmulti]

[multicast] [[-]promisc]

[mem_start ] [io_addr ] [irq ] [media ]

[txqueuelen ]

[[-]dynamic]

[up|down] …

=Hardware Type.

List of possible hardware types:

loop (Local Loopback) slip (Serial Line IP) cslip (VJ Serial Line IP)

slip6 (6-bit Serial Line IP) cslip6 (VJ 6-bit Serial Line IP) adaptive (Adaptive Serial Line IP)

strip (Metricom Starmode IP) ash (Ash) ether (Ethernet)

tr (16/4 Mbps Token Ring) tr (16/4 Mbps Token Ring (New)) ax25 (AMPR AX.25)

netrom (AMPR NET/ROM) rose (AMPR ROSE) tunnel (IPIP Tunnel)

ppp (Point-to-Point Protocol) hdlc ((Cisco)-HDLC) lapb (LAPB)

arcnet (ARCnet) dlci (Frame Relay DLCI) frad (Frame Relay Access Device)

sit (IPv6-in-IPv4) fddi (Fiber Distributed Data Interface) hippi (HIPPI)

irda (IrLAP) ec (Econet) x25 (generic X.25)

infiniband (InfiniBand)

=Address family. Default: inet

List of possible address families:

unix (UNIX Domain) inet (DARPA Internet) inet6 (IPv6)

ax25 (AMPR AX.25) netrom (AMPR NET/ROM) rose (AMPR ROSE)

ipx (Novell IPX) ddp (Appletalk DDP) ec (Econet)

ash (Ash) x25 (CCITT X.25)

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