Centos系统下查看和修改网卡Mac地址(附ifconfig命令格式)
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] <interface> [[<AF>] <address>] [add <address>[/<prefixlen>]] [del <address>[/<prefixlen>]] [[-]broadcast [<address>]] [[-]pointopoint [<address>]] [netmask <address>] [dstaddr <address>] [tunnel <address>] [outfill <NN>] [keepalive <NN>] [hw <HW> <address>] [metric <NN>] [mtu <NN>] [[-]trailers] [[-]arp] [[-]allmulti] [multicast] [[-]promisc] [mem_start <NN>] [io_addr <NN>] [irq <NN>] [media <type>] [txqueuelen <NN>] [[-]dynamic] [up|down] ... <HW>=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) <AF>=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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