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今天早上,将前几天在另外一台电脑上建立的虚拟机文件拷贝过来重新打开,系统启动后,发现网卡eth0启动不了!
估计是虚拟机移动之后,虚拟网卡的mac地址发生了变化,所以fc9将旧的网卡eth0变成eth1来启动了,但查看/etc/sysconfig/network-scripts/下面,也没见eth1的配置文件存在,但ifconfig,列出eth1已经启动,并已从dhcp获得ip地址。
经过仔细研究,发现是udev作怪了。发现/etc/udev/rules.d/70-persistent-net.rules这个文件里面有如下记录
QUOTE: |
[root@kevin~]#cat70-persistent-net.rules
#Thisfilewasautomaticallygeneratedbythe/lib/udev/write_net_rules
#programrunbythepersistent-net-generator.rulesrulesfile.
#
#Youcanmodifyit,aslongasyoukeepeachruleonasingleline.
#AdvancedMicroDevices[AMD]79c970[PCnet32LANCE](rulewrittenbyanaconda)
SUBSYSTEM=="net",ACTION=="add",DRIVERS=="?*",ATTR{address}=="00:0c:29:d2:3f:2c",ATTR{type}=="1",KERNEL=="eth*",NAME="eth0"
#PCIdevice0x1022:0x2000(pcnet32)
SUBSYSTEM=="net",ACTION=="add",DRIVERS=="?*",ATTR{address}=="00:0c:29:87:43:18",ATTR{type}=="1",KERNEL=="eth*",NAME="eth1"
#PCIdevice0x1022:0x2000(pcnet32)
SUBSYSTEM=="net",ACTION=="add",DRIVERS=="?*",ATTR{address}=="00:0c:29:87:43:22",ATTR{type}=="1",KERNEL=="eth*",NAME="eth2"
#PCIdevice0x1022:0x2000(pcnet32)
SUBSYSTEM=="net",ACTION=="add",DRIVERS=="?*",ATTR{address}=="00:0c:29:c8:3a:15",ATTR{type}=="1",KERNEL=="eth*",NAME="eth3"
这是udev在发现网卡mac变更之后,自动将接口改名的结果。将这个/etc/udev/rules.d/70-persistent-net.rules删除,重启,网卡eth0成功启动,并重新生成/etc/udev/rules.d/70-persistent-net.rules文件。
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