I just finished this part of the installation: http://docs.openstack.org/havana/install-guide/install/apt/content/install-neutron.install-plug-in.ovs.vlan.html

and now I lost communication with DATA network as soon as i did the above. I did br-DATA_INTERFACE = br-eth1

I have 3 physical interfaces eth1 (Data), eth2 (External), eth3 (Management) and br-eth1 (Should be Data), br-ex (Is external and working), br-int (management??), int-br-eth1, phy-br-eth1. But now i cant communicate with Data network. eth3, br-ex and br-eth1 have ip address. eth1 has no configuration and eth2 is in promiscous mode. External communication from network node works but nothing else.

I have 3 compute nodes, Each of them have 2 active interface, eth1 (Management) and eth2 (Data) the data and management refer to different vlans. The default GW for the compute nodes is the data interface of network node. At the moment other than the network node no other node can reach the Internet.

On the other hand controller node only has one interface (i can add one more if necessary) which is connected to the management network.

I'm using openVswitch

[ovs]
tenant_network_type = vlan
network_vlan_ranges = physnet1:2000:4094
bridge_mappings = physnet1:br-eth1

Here is my interface configuration on the network node:

The Data Network

auto br-eth1
iface br-eth1 inet static
    address 172.16.10.1
        netmask 255.255.255.0

The External Network

auto br-ex
iface br-ex inet static
    address *******
    netmask *******
    network *******
    broadcast *******
    gateway *******
    # dns-* options are implemented by the resolvconf package, if installed
    dns-nameservers ******8
    dns-search 

auto eth2
iface eth2 inet manual
up ifconfig $IFACE 0.0.0.0 up
up ip link set $IFACE promisc on
down ip link set $IFACE promisc off
down ifconfig $IFACE down

The Management Network

auto eth3
iface eth3 inet static
        address 172.16.11.10
        netmask 255.255.255.0