Linux Ethernet Bridging - Nov 2010 - [Bridge] Testing bridge setup with packet generator and qemu

Hi,
I would like to test a simple bridge setup.
br0 have eth0 and eth1
I want to create a fake traffic and see it crossing the bridge.
My main goal is to write a local script that will run tests locally on
the ebtables rules as I change them.
Lets say i'm generating arp packet with nemesis:
nemesis arp -v -d eth0 -S $SRC -D $DST -h $SRC_MAC -m $DST_MAC # request
nemesis arp -v -r -d eth0 -S $DST -D $SRC -h $DST_MAC -m $SRC_MAC # reply

This shows on eth0 tcpdump but not on eth1 tcpdump
Why the bridge doesn't forward to eth1 the arp packets?

I have a gentoo rootfs.
qemu nics are define like this:
?-net nic,model=rtl8139,vlan=0 -net user,vlan=0 \
?-net nic,model=rtl8139,vlan=1

Regards,
Kfir