上不去网的怪问题

projoy

我的提问有很多代码，因为就是这些代码令我不解，请帮帮忙，谢谢大家了。因为使用了VIRTUALBOX，所以在UBUNTU 8.04中设置了桥接，重启机后不能上网，ifconfig内容如下

br0       Link encap:Ethernet  HWaddr 00:1b:24:85:e1:61  
          inet addr:192.168.0.68  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:46 errors:0 dropped:0 overruns:0 frame:0
          TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4096 (4.0 KB)  TX bytes:7751 (7.5 KB)

eth0      Link encap:Ethernet  HWaddr 00:1b:24:85:e1:61  
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:55 errors:0 dropped:0 overruns:0 frame:0
          TX packets:69 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:4838 (4.7 KB)  TX bytes:7957 (7.7 KB)
          Interrupt:17

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:44 errors:0 dropped:0 overruns:0 frame:0
          TX packets:44 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2440 (2.3 KB)  TX bytes:2440 (2.3 KB)

tap0      Link encap:Ethernet  HWaddr 00:ff:50:95:b1:31  
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:93 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
其中bro中的inet addr:192.168.0.68为我以前设置的。现在已经不是了，但为什么br0还没有改过来？
我使用ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
From 192.168.1.103 icmp_seq=1 Destination Host Unreachable
From 192.168.1.103 icmp_seq=2 Destination Host Unreachable
From 192.168.1.103 icmp_seq=3 Destination Host Unreachable
然后使用sudo /etc/init.d/networking restart
内容如下
* Reconfiguring network interfaces...                                          RTNETLINK answers: No such process
SIOCDELRT: No such process
RTNETLINK answers: No such process
SIOCDELRT: No such process
Set 'tap0' persistent and owned by uid 1000
device br0 already exists; can't create bridge with the same name

Waiting for br0 to get ready (MAXWAIT is 32 seconds).
此时还是上不去网，我又一次使用sudo /etc/init.d/networking restart
* Reconfiguring network interfaces...                                          
RTNETLINK answers: No such process
Set 'tap0' persistent and owned by uid 1000

Waiting for br0 to get ready (MAXWAIT is 32 seconds).
此时就可以上网了，而这时的ifconfig内容变为
br0       Link encap:Ethernet  HWaddr 00:1b:24:85:e1:61  
          inet addr:192.168.1.62  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:431 errors:0 dropped:0 overruns:0 frame:0
          TX packets:99 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:28789 (28.1 KB)  TX bytes:41019 (40.0 KB)

eth0      Link encap:Ethernet  HWaddr 00:1b:24:85:e1:61  
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:544 errors:0 dropped:0 overruns:0 frame:0
          TX packets:278 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:37351 (36.4 KB)  TX bytes:59224 (57.8 KB)
          Interrupt:17

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:131 errors:0 dropped:0 overruns:0 frame:0
          TX packets:131 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7949 (7.7 KB)  TX bytes:7949 (7.7 KB)

tap0      Link encap:Ethernet  HWaddr 00:ff:50:95:b1:31  
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:570 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
这到底是怎么回事呢？

projoy

/etc/network/interfaces内容如下
# 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

# The primary network interface
auto eth0
#iface eth0 inet dhcp

iface eth0 inet static
address 192.168.1.103
netmask 255.255.255.0
gateway 192.168.1.1

auto tap0
iface tap0 inet manual
up ifconfig $IFACE 0.0.0.0 up
down ifconfig $IFACE down
tunctl_user smouse

auto br0
iface br0 inet static
address 192.168.1.62
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
bridge_ports all tap0

projoy

急等回音，帮帮忙啦，十分感谢

ut1111

从文件上没看出问题，如果你的UBUNTU是装在虚拟机上的，感觉应该是你是虚拟机的问题，可以删除虚拟机网卡，重新设置下看看

projoy

唉，可是我的UBUNTU不是装的虚拟机上啊，很奇怪的是为什么重启机后br0的网址是以前设置的，而两次sudo /etc/init.d/networking restart后br0的IP就变为我正常设置的了？

zljmy

还是看不出什么问题.不好意思!