建立网桥失败，内详。

Xorcerer

/etc/network/interfaces的配置如下：

1. 
   
2. # This file describes the network interfaces available on your system
   
3. # and how to activate them. For more information, see interfaces(5).
   
4. 
   
5. # The loopback network interface
   
6. auto lo
   
7. iface lo inet loopback
   
8. 
   
9. # The primary network interface
   
10. auto eth0
    
11. iface eth0 inet static
    
12.         address 202.121.210.103
    
13.         netmask 255.255.0.0
    
14.         network 202.121.0.0
    
15.         broadcast 202.121.255.255
    
16.         gateway 202.121.212.129
    
17.         # dns-* options are implemented by the resolvconf package, if installed
    
18.         dns-nameservers 202.121.209.11
    
19.         dns-search SMUZone
    
20. 
    
21. auto tap0
    
22. iface tap0 inet manual
    
23. up ifconfig $IFACE 0.0.0.0 up
    
24. down ifconfig $IFACE down
    
25. tunctl_user xz
    
26. 
    
27. auto br0
    
28. iface br0 inet static
    
29.         address 202.121.210.103
    
30.         netmask 255.255.0.0
    
31.         network 202.121.0.0
    
32.         broadcast 202.121.255.255
    
33.         gateway 202.121.212.129
    

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运行结果如下：

1. 
   
2. xz@Xz-Laptop:~$ sudo ifup tap0
   
3. ifup: interface tap0 already configured
   
4. xz@Xz-Laptop:~$ sudo ifup br0
   
5. br0: ERROR while getting interface flags: No such device
   
6. SIOCSIFADDR: No such device
   
7. br0: ERROR while getting interface flags: No such device
   
8. SIOCSIFNETMASK: No such device
   
9. SIOCSIFBRDADDR: No such device
   
10. br0: ERROR while getting interface flags: No such device
    
11. br0: ERROR while getting interface flags: No such device
    
12. Failed to bring up br0.
    
13. xz@Xz-Laptop:~$
    

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谢谢，需要更多的信息，请跟贴提出。