[neutron][ovs] br-tun bridge setup

Hi all, I'm setting up neutron and ovs and I can't make br-tun work and pick up the ip address configured in openvswitch_agent.ini file. If I tcpdump br-tun tcpdump -l -n -i br-tun 'port 4789' I don't see any traffic getting through however(it goes through the physical interface) if I spin up a vm, it reaches the internet, I can ping it from another machine after allocating a floating ip but can't ssh into it. Can anyone please share the /etc/network/interfaces file configuration for br-tun? Should the br-tun ip address be configured on the bridge or in the physical interface the bridge is attached to? Should the vxlan traffic go through br-tun bridge? Thanks Jaime -- salu2 Jaime