[Bridge] Ubuntu: network bridging between wireless and wired connection fails

[Jochen Hebbrecht]

Ross Vandegrift schreef:
> On Tue, Apr 28, 2009 at 02:52:10PM +0200, Jochen Hebbrecht wrote:
>   
>> Okay, thnx!
>> Just a small question, I think I need to configure eth0 and eth1 to
>> manual? And not to DHCP?
>>
>> Like this:
>> ----------------------------------------
>> auto eth0
>> iface eth0 inet manual
>>
>> auto eth1
>> iface eth1 inet manual
>> ----------------------------------------
>>     
>
> Ah - I missed that.  Yes, you definitely want to set the member
> interfaces to manual.
>  
>   
>> The thing I don't understand then: if you execute a dhclient on br0,
>> how does br0 know the configuration of eth1? Because there's a WPA2
>> configuration on it. Will it use that settings too while bridging?
>>     
>
> I'll be honest, I'm not sure - I've never done that with
> wpa_supplicant and the debian tools.  You might need to activate
> wpa_supplicant in the pre-up for br0.
>
> Check out the manpage for interfaces - it may have more details.
>   

Ok, I made it myself a little easier by temporarly switching from WPA2 
to unsecure wireless networking.

I'm having the following configuration:

Code:

to lo
iface lo inet loopback

auto eth0
iface eth0 inet manual

auto eth1
iface eth1 inet manual
wireless-essid ##MY-ESSID##
wireless-mode managed

auto br0
iface br0 inet dhcp
bridge_ports eth0, eth1

When I reboot, my interfaces are getting the following config:

Code:

br0       Link encap:Ethernet  HWaddr 00:0a:e4:ae:7e:4c  
          inet6 addr: fe80::20a:e4ff:feae:7e4c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:87 errors:0 dropped:0 overruns:0 frame:0
          TX packets:23 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:17544 (17.1 KB)  TX bytes:3744 (3.6 KB)

br0:avahi Link encap:Ethernet  HWaddr 00:0a:e4:ae:7e:4c  
          inet addr:169.254.7.81  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0      Link encap:Ethernet  HWaddr 00:0a:e4:ae:7e:4c  
          inet6 addr: fe80::20a:e4ff:feae:7e4c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3 errors:0 dropped:0 overruns:0 frame:0
          TX packets:89 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1770 (1.7 KB)  TX bytes:23069 (22.5 KB)
          Interrupt:20 Base address:0xc000 

eth1      Link encap:Ethernet  HWaddr 00:15:00:1f:20:a6  
          inet addr:192.168.1.111  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::215:ff:fe1f:20a6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:223 errors:0 dropped:0 overruns:0 frame:0
          TX packets:99 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:18762 (18.3 KB)  TX bytes:8392 (8.1 KB)
          Interrupt:21 Base address:0xa000 Memory:c8006000-c8006fff 

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:16436  Metric:1
          RX packets:1879 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1879 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:94956 (92.7 KB)  TX bytes:94956 (92.7 KB

The bridge looks ok:

Code:

jochus at Bacardi ~ $ sudo brctl show br0
[sudo] password for jochus: 
bridge name     bridge id               STP enabled     interfaces
br0             8000.000ae4ae7e4c       no              eth0
                                                        eth1

My routing table looks like this:

Code:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 br0
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 eth1
0.0.0.0         0.0.0.0         0.0.0.0         U     1000   0        0 br0

But I'm not able to ping my router ...

Code:

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.