1、在Linux上，在ifcfg-eth0上设置IP地址等信息
详细配置信息如下已
[root@rac01 Desktop]#more/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
NM_CONTROLLED=yes
ONBOOT=no
TYPE=Ethernet
UUID=3d5f18d5-73e0-48db-acbb-67d3ee8b332f
IPADDR=192.168.171.150
PREFIX=24
2、IP地址不生效的情况
（1）ifconfig查看eth0网卡信息，发现IP地址并没有生效
[root@rac01 Desktop]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:84:F2:24
inet6 addr: fe80::20c:29ff:fe84:f224/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:468 (468.0 b)
问题比较鬼异，明明在ifcfg-eth0文件中设置有IP地址192.168.171.150的，为什么会系统却获不到IP地址呢。
（2）ping别的IP地址报如下错误：
[root@rac01Desktop]# ping 192.168.171.180
connect:Network is unreachable
（3）重启网络服务提示网卡没有活动
[root@rac01 network-scripts]# service network restart
Shutting down interface eth0: Error: Device 'eth0' (/org/freedesktop/NetworkManager/Devices/0) disconnecting failed: This device is not active
[FAILED]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
3、问题分析
从第2节中的3点信息来判断，基本确定为网卡没有启动所致。
4、处理解决
[root@rac01 Desktop]# ifup ifcfg-eth0
Active connection state: activated
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/1
[root@rac01 Desktop]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:84:F2:24
inet addr:192.168.171.150 Bcast:192.168.171.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe84:f224/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1 errors:0 dropped:0 overruns:0 frame:0
TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:82 (82.0 b) TX bytes:7277 (7.1 KiB)
到此，网卡已经正常工作。
