Windows客户端一直ping 192.168.11.100 ，一直通，停止心跳服务后中间会中断一会，之后一直通；
在从上ifconfig查看出现eth1:0，查看nginx进程也有，说明转换到从机器上运行；
13、测试3：测试脑裂，主和从都停掉eth1网卡；
eth1网卡禁用，ifdown eth1 心跳线断了之后，会发生脑裂；主从之间连接断了，从在死亡时间没收到主的心跳，则认为主死亡。
主死了，从机器接管服务，从机器使用虚��ip地址，主和从都在运行服务；
主机器没有eth1网卡，一直运行nginx；
[root@yong ha.d]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:43:3D:32
inet addr:192.168.20.20 Bcast:192.168.20.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe43:3d32/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11442 errors:0 dropped:0 overruns:0 frame:0
TX packets:15376 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:842833 (823.0 KiB) TX bytes:10226838 (9.7 MiB)
Interrupt:18 Base address:0x2000
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:65536 Metric:1
RX packets:1163 errors:0 dropped:0 overruns:0 frame:0
TX packets:1163 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:150095 (146.5 KiB) TX bytes:150095 (146.5 KiB)
[root@yong ha.d]# ps aux |grep nginx
root 11686 0.0 0.1 5000 636 ? Ss 14:27 0:00 nginx: master process /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf
nobody 11687 0.0 0.1 5200 988 ? S 14:27 0:00 nginx: worker process
从机器查看地址，eth1:0出现
[root@localhost ha.d]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:97:C3:EC
inet addr:192.168.20.30 Bcast:192.168.20.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe97:c3ec/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7901 errors:0 dropped:0 overruns:0 frame:0
TX packets:5891 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:603592 (589.4 KiB) TX bytes:2094606 (1.9 MiB)
Interrupt:19 Base address:0x2000
eth1 Link encap:Ethernet HWaddr 00:0C:29:97:C3:F6
inet6 addr: fe80::20c:29ff:fe97:c3f6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:20774 errors:0 dropped:0 overruns:0 frame:0
TX packets:59144 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3513861 (3.3 MiB) TX bytes:12998603 (12.3 MiB)
Interrupt:18 Base address:0x2080
eth1:0 Link encap:Ethernet HWaddr 00:0C:29:97:C3:F6
inet addr:192.168.11.100 Bcast:0.0.0.0 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:18 Base address:0x2080