[Bridge] Port link status disconnect

[Jorge Lanza]

Hi all.

I have been working with bridges on kernel 2.4.X but now I have upgrade to 
kernel 2.6.11 and the behaviour seems to be different.
I face problem when I include a wireless device as in /var/log/messages I 
get (3-5) which before I didn't.

1)May  5 10:53:01 fuj1 kernel: br0: topology change detected, propagating
2)May  5 10:53:01 fuj1 kernel: br0: port 2(eth2) entering forwarding state
3)May  5 10:53:06 fuj1 kernel: eth2: New link status: Disconnected (0002)
4)May  5 10:53:06 fuj1 kernel: ip_tables: (C) 2000-2002 Netfilter core team
5)May  5 10:53:07 fuj1 kernel: eth2: New link status: Connected (0001)
6)May  5 10:53:20 fuj1 kernel: br0: port 2(eth2) entering disabled state


Lets explain the steps I follow. Brigde ports  --- eth1 wired 
interface      eth2 wireless interface
To set up the bridge and include both ports I run the following.

brctl addbr br0
brctl addif br0 eth1
brctl addif br0 eth2
ifconfig eth1 0.0.0.0
ifconfig eth2 0.0.0.0
ifconfig br0 10.0.1.4 up

As you can see I set the eth2 ip address to 0.0.0.0. However after a while 
the eth2 returns by it self to the previous configured IP address (i.e. 
128.0.1.50). So, in order to make things work in the correct way I have to 
retype ifconfig eth2 0.0.0.0 and the second time seems that everything 
works as expected and the eth2 doesn't go back to the previous state.

Why does it happen? What can I do? I need the device not to "get out of the 
brigde" and reconfigured. I have try to brctl br0 setfd 0  but still have 
the same problem.

Any help is really welcomed.

TA.