Linux Ethernet Bridging - Apr 2007 - [Bridge] Bridge problem

Hi,

I am a newbie to use the bridge utils and after some serious tests I am 
posting this issue. Actually, I am fascing packet forwarding problem in the 
following network setup under linux 2.6.16. The 2.6.16 kernel is also 
configured to include 802.1d Ethernet bridging, Network packet filtering, IP 
netfilter configuration and Bridge netfilter configuration.

The target ARM board is made to act as a bridge between the Host and the 
Router as shown below.

10.1.111.3 Host(eth0)<---->{ eth0 bridge(10.1.111.1) eth1
}<--->Router(
10.1.111.254)

On the target board

ifconfig eth0 0.0.0.0
ifconfig eth1 0.0.0.0
brctl addbr br0
brctl addif br0 eth0
brctl addif br0 eth1
ifconfig br0 10.1.111.1 netmask 255.255.255.0 up
echo 1 > /proc/sys/net/ipv4/ip_forward

are configured. The problem is that, I can't ping the Router from the Host. 
But from the bridge, I can ping Router and Host. The "arp reply" from
the
Router is not reaching the Host as there's a problem in the bridge 
(bridge-utils 1.2) interface.

I have cross checked the kernel configuration to include all the packet 
forwarding and bridging. But still panic.

Can any one please precise what could cause this packet forward problem ?

Thanks
Sara

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Hello,
I just installed Ubuntu 6.10 and everything worked fine and I was able to
access the internet, I loaded bridge utils and configured a bridge and set
the bridge as a DHCP client, it all went ok, except I was no longer able to
access the internet. Yet I had the exact same configuration working on
Ubuntu 6.06 yesterday, any ideas?
Thank you for your time
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On Mon, 15 Nov 2004 18:58:06 +0000
Javier Valencia <jvalencia@log01.org> wrote:
> I'm getting problems with my bridge (linux 2.6.9, eth0 = via-rhine,
eth1 = 8139too).
> The problem is that eth1 links up and down intermitently (between 1-2
minutes).
> 
> What can i do?
> 
> Thanks
> 
You could turn on debugging in the 8139too driver and add additional
instrumentation to see why it thinks it loses carrier. Also, do the
obvious stuff like check the cable and what is connected to (router, hub,
switch,
DSL modem, ...). Maybe there is a duplex or speed mismatch?

I'm getting problems with my bridge (linux 2.6.9, eth0 = via-rhine, eth1 =
8139too).
The problem is that eth1 links up and down intermitently (between 1-2 minutes).

What can i do?

Thanks