netconsole使用问题

tqyou85

想启动netconsole将本地主机的内核日志 打印到远程主机上。
本地主机：
1. 修改/etc/sysconfig/netconsole文件

1. # This is the configuration file for the netconsole service.  By starting
   
2. # this service you allow a remote syslog daemon to record console output
   
3. # from this system.
   
4. 
   
5. # The local port number that the netconsole module will use
   
6. LOCALPORT=6666
   
7. 
   
8. # The ethernet device to send console messages out of (only set this if it
   
9. # can't be automatically determined)
   
10. # DEV=
    
11. 
    
12. # The IP address of the remote syslog server to send messages to
    
13. SYSLOGADDR=172.16.118.118
    
14. 
    
15. # The listening port of the remote syslog daemon
    
16. SYSLOGPORT=22222
    
17. 
    
18. # The MAC address of the remote syslog server (only set this if it can't
    
19. # be automatically determined)
    
20. # SYSLOGMACADDR=

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2. 启动netconsole（前提是netconsole已经编译进内核）
/etc/init.d/netconsole start
启动之后dmesg查看有如下信息

1. [ 2183.363726] netpoll: netconsole: local port 6666
   
2. [ 2183.363730] netpoll: netconsole: local IPv4 address 172.16.118.101
   
3. [ 2183.363732] netpoll: netconsole: interface 'eth0'
   
4. [ 2183.363733] netpoll: netconsole: remote port 22222
   
5. [ 2183.363735] netpoll: netconsole: remote IPv4 address 172.16.118.118
   
6. [ 2183.363737] netpoll: netconsole: remote ethernet address 00:0c:29:38:8a:35
   
7. [ 2183.363762] console [netcon0] enabled
   
8. [ 2183.363764] netconsole: network logging started

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3. 加载自己写的helloworld模块，dmesg查看内核有打印

1. [ 4278.590553] hello, world!
   
2. [ 4280.590391] hello, world!
   
3. [ 4282.590218] hello, world!
   
4. [ 4284.590041] hello, world!

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远程主机
执行命令nc -u -l -p 22222
执行完成后，应该能看到“hello, world!”吧？但是现状是什么都没看到。。。

两台主机的防火墙都是关闭的。fedora操作系统，内核版本：3.11.10-301.fc20.i686+PAE
在远程主机上用tcpdump抓包，没有抓到端口22222的udp包

请大侠帮忙看看是怎么回事？