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linux/Centos下查看网卡Mac地址,输入命令: #ifconfig -a eth0 Link encap:Ethernet HWaddr 00:e4:56:2E:D8:20 00:e4:56:2E:D8:20即是你的MAC地址。
linux/Centos下以root权限临时修改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 4)查看修改是否生效: ifconfig eth0 | grep HWaddr 注意:上述修改MAC地址只是暂时的,系统重启后,系统会恢复原物理MAC地址。
Linux/Centos下如何永久修改网卡MAC地址
网上有很多关于linux下修改MAC地址的方法,经过测试,最终解决方法如下: 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.”
在linux/Centos环境下将修改后的MAC地址永久保存的正确的步骤如下: #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 注意: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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