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LinuxSir.cn，穿越时空的Linuxsir!»论坛 › Linux 发行版讨论区 —— LinuxSir.cn › Debian Linux › 虚拟网卡干扰正常上网，请帮忙给看一下。 ...
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虚拟网卡干扰正常上网，请帮忙给看一下。

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wolfkin
发表于 2006-11-6 16:10:15 | 显示全部楼层 |阅读模式
虚拟网卡干扰正常上网，请帮忙给看一下。

今天更新系统之后出现虚拟网卡干扰正常上网的现象，以前没有发生过这种情况。

  2. apt-get update; apt-get -y upgrade; apt-get -y dist-upgrade
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如下是网卡配置文件，

  2. wolfkin:~# cat /etc/network/interfaces
  3. # This file describes the network interfaces available on your system
  4. # and how to activate them. For more information, see interfaces(5).

  6. # The loopback network interface
  7. auto lo
  8. iface lo inet loopback

  10. # This is a list of hotpluggable network interfaces.
  11. # They will be activated automatically by the hotplug subsystem.
  12. mapping eth0
  13.         script grep
  14.         map eth0

  16. # The primary network interface
  17. allow-hotplug eth0
  18. iface eth0 inet dhcp

  20. # Bridge for QEMU
  21. auto br0
  22. iface br0 inet dhcp
  23.         pre-up /sbin/ifconfig eth0 up
  24.         network 192.168.1.0
  25.         bridge_ports eth0
  26.         # bridge_fd 9
  27.         # bridge_hello 2
  28.         # bridge_maxage 12
  29.         # bridge_stp off
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如下是启动以后，执行的命令及其结果，

  2. wolfkin:~# ping -c 3 192.168.1.1
  3. PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
  4. From 192.168.1.130 icmp_seq=1 Destination Host Unreachable
  5. From 192.168.1.130 icmp_seq=2 Destination Host Unreachable
  6. From 192.168.1.130 icmp_seq=3 Destination Host Unreachable

  8. --- 192.168.1.1 ping statistics ---
  9. 3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2010ms
  10. , pipe 3
  11. wolfkin:~# ifconfig
  12. br0       Link encap:Ethernet  HWaddr 00:50:8D:60:6A:3A  
  13.           inet addr:192.168.1.130  Bcast:192.168.1.255  Mask:255.255.255.0
  14.           inet6 addr: fe80::250:8dff:fe60:6a3a/64 Scope:Link
  15.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  16.           RX packets:326 errors:0 dropped:0 overruns:0 frame:0
  17.           TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
  18.           collisions:0 txqueuelen:0
  19.           RX bytes:23104 (22.5 KiB)  TX bytes:810 (810.0 b)

  21. eth0      Link encap:Ethernet  HWaddr 00:50:8D:60:6A:3A  
  22.           inet addr:192.168.1.130  Bcast:192.168.1.255  Mask:255.255.255.0
  23.           inet6 addr: fe80::250:8dff:fe60:6a3a/64 Scope:Link
  24.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  25.           RX packets:364 errors:0 dropped:0 overruns:0 frame:0
  26.           TX packets:96 errors:0 dropped:0 overruns:0 carrier:0
  27.           collisions:0 txqueuelen:1000
  28.           RX bytes:32613 (31.8 KiB)  TX bytes:7966 (7.7 KiB)
  29.           Interrupt:11 Base address:0xc000

  31. lo        Link encap:Local Loopback  
  32.           inet addr:127.0.0.1  Mask:255.0.0.0
  33.           inet6 addr: ::1/128 Scope:Host
  34.           UP LOOPBACK RUNNING  MTU:16436  Metric:1
  35.           RX packets:26 errors:0 dropped:0 overruns:0 frame:0
  36.           TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
  37.           collisions:0 txqueuelen:0
  38.           RX bytes:2810 (2.7 KiB)  TX bytes:2810 (2.7 KiB)
  39. wolfkin:~# ifdown br0
  40. br0: port 1(eth0) entering disabled state
  41. eth0: Promiscuous mode enabled.
  42. device eth0 left promiscuous mode
  43. br0: port 1(eth0) entering disabled state
  44. wolfkin:~# ping -c 3 192.168.1.1
  45. connect: Network is unreachable
  46. wolfkin:~# ifconfig
  47. lo        Link encap:Local Loopback  
  48.           inet addr:127.0.0.1  Mask:255.0.0.0
  49.           inet6 addr: ::1/128 Scope:Host
  50.           UP LOOPBACK RUNNING  MTU:16436  Metric:1
  51.           RX packets:26 errors:0 dropped:0 overruns:0 frame:0
  52.           TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
  53.           collisions:0 txqueuelen:0
  54.           RX bytes:2810 (2.7 KiB)  TX bytes:2810 (2.7 KiB)
  55. wolfkin:~# ifup eth0
  56. ifup: interface eth0 already configured
  57. wolfkin:~# ifdown eth0
  58. wolfkin:~# ifup eth0
  59. Internet Software Consortium DHCP Client 2.0pl5
  60. Copyright 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium.
  61. All rights reserved.

  63. Please contribute if you find this software useful.
  64. For info, please visit http://www.isc.org/dhcp-contrib.html

  66. sit0: unknown hardware address type 776
  67. eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
  68. sit0: unknown hardware address type 776
  69. Listening on LPF/eth0/00:50:8d:60:6a:3a
  70. Sending on   LPF/eth0/00:50:8d:60:6a:3a
  71. Sending on   Socket/fallback/fallback-net
  72. DHCPREQUEST on eth0 to 255.255.255.255 port 67
  73. DHCPACK from 192.168.1.62
  74. bound to 192.168.1.130 -- renewal in 43200 seconds.
  75. wolfkin:~# ifconfig
  76. eth0      Link encap:Ethernet  HWaddr 00:50:8D:60:6A:3A
  77.           inet addr:192.168.1.130  Bcast:192.168.1.255  Mask:255.255.255.0
  78.           inet6 addr: fe80::250:8dff:fe60:6a3a/64 Scope:Link
  79.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  80.           RX packets:454 errors:0 dropped:0 overruns:0 frame:0
  81.           TX packets:104 errors:0 dropped:0 overruns:0 carrier:0
  82.           collisions:0 txqueuelen:1000
  83.           RX bytes:41254 (40.2 KiB)  TX bytes:9049 (8.8 KiB)
  84.           Interrupt:11 Base address:0xc000

  86. lo        Link encap:Local Loopback
  87.           inet addr:127.0.0.1  Mask:255.0.0.0
  88.           inet6 addr: ::1/128 Scope:Host
  89.           UP LOOPBACK RUNNING  MTU:16436  Metric:1
  90.           RX packets:26 errors:0 dropped:0 overruns:0 frame:0
  91.           TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
  92.           collisions:0 txqueuelen:0
  93.           RX bytes:2810 (2.7 KiB)  TX bytes:2810 (2.7 KiB)
  94. wolfkin:~# ping -c 3 192.168.1.1
  95. PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
  96. 64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=3.38 ms
  97. 64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=1.04 ms
  98. 64 bytes from 192.168.1.1: icmp_seq=3 ttl=255 time=1.21 ms

  100. --- 192.168.1.1 ping statistics ---
  101. 3 packets transmitted, 3 received, 0% packet loss, time 2001ms
  102. rtt min/avg/max/mdev = 1.048/1.883/3.383/1.062 ms
  103. wolfkin:~# ifup br0
  104. eth0: Promiscuous mode enabled.
  105. device eth0 entered promiscuous mode
  106. eth0: Promiscuous mode enabled.
  107. eth0: Promiscuous mode enabled.
  108. br0: port 1(eth0) entering learning state

  110. Waiting for br0 to get ready (MAXWAIT is 32 seconds).
  111. br0: topology change detected, propagating
  112. br0: port 1(eth0) entering forwarding state
  113. Internet Software Consortium DHCP Client 2.0pl5
  114. Copyright 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium.
  115. All rights reserved.

  117. Please contribute if you find this software useful.
  118. For info, please visit http://www.isc.org/dhcp-contrib.html

  120. sit0: unknown hardware address type 776
  121. sit0: unknown hardware address type 776
  122. Listening on LPF/br0/00:50:8d:60:6a:3a
  123. Sending on   LPF/br0/00:50:8d:60:6a:3a
  124. Sending on   Socket/fallback/fallback-net
  125. DHCPREQUEST on br0 to 255.255.255.255 port 67
  126. DHCPACK from 192.168.1.62
  127. bound to 192.168.1.130 -- renewal in 43200 seconds.
  128. wolfkin:~# ping -c 3 192.168.1.1
  129. PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
  130. 64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=2.93 ms
  131. 64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=1.05 ms
  132. 64 bytes from 192.168.1.1: icmp_seq=3 ttl=255 time=3.18 ms

  134. --- 192.168.1.1 ping statistics ---
  135. 3 packets transmitted, 3 received, 0% packet loss, time 2000ms
  136. rtt min/avg/max/mdev = 1.059/2.391/3.183/0.947 ms
  137. wolfkin:~# ifconfig
  138. br0       Link encap:Ethernet  HWaddr 00:50:8D:60:6A:3A
  139.           inet addr:192.168.1.130  Bcast:192.168.1.255  Mask:255.255.255.0
  140.           inet6 addr: fe80::250:8dff:fe60:6a3a/64 Scope:Link
  141.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  142.           RX packets:7107 errors:0 dropped:0 overruns:0 frame:0
  143.           TX packets:5765 errors:0 dropped:0 overruns:0 carrier:0
  144.           collisions:0 txqueuelen:0
  145.           RX bytes:3017289 (2.8 MiB)  TX bytes:743612 (726.1 KiB)

  147. eth0      Link encap:Ethernet  HWaddr 00:50:8D:60:6A:3A
  148.           inet6 addr: fe80::250:8dff:fe60:6a3a/64 Scope:Link
  149.           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  150.           RX packets:7980 errors:0 dropped:0 overruns:0 frame:0
  151.           TX packets:6363 errors:0 dropped:0 overruns:0 carrier:0
  152.           collisions:0 txqueuelen:1000
  153.           RX bytes:3501780 (3.3 MiB)  TX bytes:835899 (816.3 KiB)
  154.           Interrupt:11 Base address:0xc000

  156. lo        Link encap:Local Loopback
  157.           inet addr:127.0.0.1  Mask:255.0.0.0
  158.           inet6 addr: ::1/128 Scope:Host
  159.           UP LOOPBACK RUNNING  MTU:16436  Metric:1
  160.           RX packets:2231 errors:0 dropped:0 overruns:0 frame:0
  161.           TX packets:2231 errors:0 dropped:0 overruns:0 carrier:0
  162.           collisions:0 txqueuelen:0
  163.           RX bytes:255351 (249.3 KiB)  TX bytes:255351 (249.3 KiB)

  165. wolfkin:~# uname -a
  166. Linux wolfkin 2.6.16-2-686 #1 Fri Aug 18 19:01:49 UTC 2006 i686 GNU/Linux
  167. wolfkin:~# cat /proc/version
  168. Linux version 2.6.16-2-686 (Debian 2.6.16-18) (fs@debian.org) (gcc version 4.0.4 20060730 (prerelease) (Debian 4.0.3-6)) #1 Fri Aug 18 19:01:49 UTC 2006
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发表于 2006-11-6 19:39:14 | 显示全部楼层
试试用下面这个配置文件看看。
当启用桥模式的时候，与桥关联的物理网卡一般是不需要设置IP的，因为这个时候物理网卡是处于混杂模式的。而且只要物理网卡加入到桥中的时候，当桥启动的时候会自动将相应的物理网卡启用。

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# Bridge for QEMU
auto br0
iface br0 inet dhcp
        bridge_ports eth0
        # bridge_fd 9
        # bridge_hello 2
        # bridge_maxage 12
        # bridge_stp off
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wolfkin
 楼主| 发表于 2006-11-7 13:21:41 | 显示全部楼层
行了！
非常感谢！
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