弹出界面eth0/eth1错误 激活连接失败 master connection not found or invalid 解决办法

原文：http://www.21yunwei.com/archives/3760

原因是NetworkManager 开启导致。关闭NetworkManager服务，否则会报错master connection not found or invalid。主要是因为NetworkManager接管了网卡启动，将NetworkManager停掉，并启动 network 服务来接管网卡服务，请查看如下四条命令：

1. service NetworkManager stop
2. chkconfig NetworkManager off
3. chkconfig network on
4. service network start

重启网卡解决。

1. [root@localhost network-scripts]# ifconfig
2. br0 Link encap:Ethernet HWaddr 00:0C:29:8C:12:98
3. inet addr:192.168.1.6 Bcast:192.168.1.255 Mask:255.255.255.0
4. inet6 addr: fe80::20c:29ff:fe8c:1298/64 Scope:Link
5. UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
6. RX packets:988 errors:0 dropped:0 overruns:0 frame:0
7. TX packets:288 errors:0 dropped:0 overruns:0 carrier:0
8. collisions:0 txqueuelen:0
9. RX bytes:61205 (59.7 KiB) TX bytes:62394 (60.9 KiB)
10.  
11. eth0 Link encap:Ethernet HWaddr 00:0C:29:8C:12:98
12. inet6 addr: fe80::20c:29ff:fe8c:1298/64 Scope:Link
13. UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
14. RX packets:98837 errors:0 dropped:0 overruns:0 frame:0
15. TX packets:24067 errors:0 dropped:0 overruns:0 carrier:0
16. collisions:0 txqueuelen:1000
17. RX bytes:95769292 (91.3 MiB) TX bytes:1979914 (1.8 MiB)
18.  
19. lo Link encap:Local Loopback
20. inet addr:127.0.0.1 Mask:255.0.0.0
21. inet6 addr: ::1/128 Scope:Host
22. UP LOOPBACK RUNNING MTU:16436 Metric:1
23. RX packets:24 errors:0 dropped:0 overruns:0 frame:0
24. TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
25. collisions:0 txqueuelen:0
26. RX bytes:1592 (1.5 KiB) TX bytes:1592 (1.5 KiB)
27.  
28. virbr0 Link encap:Ethernet HWaddr 52:54:00:EF:7F:78
29. inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
30. UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
31. RX packets:0 errors:0 dropped:0 overruns:0 frame:0
32. TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
33. collisions:0 txqueuelen:0
34. RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
35.