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由于虚拟机之间老是复制来复制去，导致网卡配置，名称不对。
比如：
[root@lei network-scripts]# cat ifcfg-eth0 DEVICE="eth0" NM_CONTROLLED="yes" ONBOOT=yes TYPE=Ethernet BOOTPROTO=static IPADDR=192.168.1.155 NETMASK=255.255.255.0 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@lei network-scripts]# cat ifcfg-eth1 DEVICE="eth1" NM_CONTROLLED="yes" ONBOOT=yes TYPE=Ethernet BOOTPROTO=static IPADDR=192.168.1.156 NETMASK=255.255.255.0 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@lei network-scripts]# ifconfig -a eth2 Link encap:Ethernet HWaddr08:00:27:BD:A6:ED inet addr:192.168.1.155 cast: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:192.168.1.156 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.
解决办法：
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@lei 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@lei 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
以上都不能生效的话，就重启操作系统。
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linux 修改网卡名称
