Hello, I am slightly confused on which node to add br-ex and which port to add to it in my setup.

From my understanding I have to create br-ex and add the port with the external network access to it. However I have already created the bridge br-eth0 and added my only interface to it.

I am receiving the following error in /var/log/neutron/l3-agent.log

2014-03-04 23:05:10.927 1034 ERROR neutron.agent.l3_agent [-] The external network bridge 'br-ex' does not exist

My setup consists of 2 node both running openvswitch:

• Controller&Networking Node: Connected to switch via eth0. eth0 is added to br-eth0 Bridge. br-eth0 has an address of 128.237.157.43
• Compute Node: Conntected to switch via eth1. eth1 is added to br-eth0 Bridge. br-eth0 has an address of 128.237.157.202

I have launched 2 vm on the compute node with ip address of 10.0.2.2 and 10.0.2.4. These vm can ping each other, and running ip netns exec qdhcp-UUID ping 10.0.2.4 on the Controller&Networking Node pings successfully. But pinging 10.0.2.1 which is an external machine does not work.

My network diagram: http://i.imgur.com/zdheQ2P.png

Thank you very much for your help.

Edit: Here's my current ovs-vsctl show. The incoming eth0 port is already added to br-eth0

root@nitrogen:~# sudo ovs-vsctl show
a1649efd-bc3f-4cd8-a58f-a14f6c4c074b
    Bridge br-int
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port "int-br-eth0"
            Interface "int-br-eth0"
        Port "tap13216f9c-9c"
            tag: 1
            Interface "tap13216f9c-9c"
                type: internal
        Port "qr-c52ae4a2-07"
            tag: 4095
            Interface "qr-c52ae4a2-07"
                type: internal
        Port br-int
            Interface br-int
                type: internal
        Port "tap7a41fbf5-d8"
            tag: 4095
            Interface "tap7a41fbf5-d8"
                type: internal
    Bridge br-tun
        Port "gre-5"
            Interface "gre-5"
                type: gre
                options: {in_key=flow, local_ip="128.237.157.43", out_key=flow, remote_ip="128.237.157.202"}
        Port br-tun
            Interface br-tun
                type: internal
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
    Bridge "br-eth0"
        Port "phy-br-eth0"
            Interface "phy-br-eth0"
        Port "eth0"
            Interface "eth0"
        Port "br-eth0"
            Interface "br-eth0"
                type: internal
    ovs_version: "1.10.2"