Linux Ethernet Bridging - Apr 2007 - [Bridge] About simple bridging using Fedora Core 2

Hi, I am a beginner of bridge. I have a problem of using Fedora Core 2 to make a
simple bridge. Here is my setup:

The bridge computer is installed with Fedore Core 2 (with the SE Linux patch).
As I know that kernel 2.6.5 is already support bridging by default, so I
didn't
recompile the kernel. Then I installed bridge-utils-0.9.6-1.i386. And no
additional configuration is made. After comfirming that the 2 ethernet cards
for bridging (eth1 & eth2) are working properly, I build up a bridge by the
following commands:

#ifconfig eth1 0.0.0.0 promisc
#ifconfig eth2 0.0.0.0 promisc
#brctl addbr mybridge
#brctl addif eth1
#brctl addif eth2
#ifconfig mybridge up

Notice that eth1 is connect to the internet directly, and eth2 is connected to a
host. After setting up the bridge, I tried to use the host to access the
internet, but the behaviour is very strange. It seems that the traffic through
the bridge is extremely slow. It's too slow to request even a webpage. But
some
tcp connection can really be established, like up2date. I have checked the
memory of the bridge, but it doesn't seem to be run out of memory.

So, what's wrong with my bridge? Could anyone help me?

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On Sat,  9 Oct 2004 12:49:35 +0800
Wu Yiu Kei <wuyiukei@cuhk.edu.hk> wrote:
> Hi, I am a beginner of bridge. I have a problem of using Fedora Core 2 to
make a
> simple bridge. Here is my setup:
> 
> The bridge computer is installed with Fedore Core 2 (with the SE Linux
patch).
> As I know that kernel 2.6.5 is already support bridging by default, so I
didn't
> recompile the kernel. Then I installed bridge-utils-0.9.6-1.i386. And no
> additional configuration is made. After comfirming that the 2 ethernet
cards
> for bridging (eth1 & eth2) are working properly, I build up a bridge by
the
> following commands:
The bridge-utils package on sourceforge.net is up to 1.0.4, with 1.0.5
due out today.

> #ifconfig eth1 0.0.0.0 promisc
> #ifconfig eth2 0.0.0.0 promisc
Dont need to put them in promiscious mode.
> #brctl addbr mybridge
> #brctl addif eth1
> #brctl addif eth2
> #ifconfig mybridge up
How are you adding the IP address to mybridge (assuming you want that host
to talk on the internet). Usual is:
	ifconfig mybridge xx.xx.xx.xx

> Notice that eth1 is connect to the internet directly, and eth2 is connected
to a
> host. After setting up the bridge, I tried to use the host to access the
> internet, but the behaviour is very strange. It seems that the traffic
through
> the bridge is extremely slow. It's too slow to request even a webpage.
But some
> tcp connection can really be established, like up2date. I have checked the
> memory of the bridge, but it doesn't seem to be run out of memory.
> 
> So, what's wrong with my bridge? Could anyone help me?
Some useful info:

brctl show
brctl showstp mybridge
brclt showmacs mybridge