queaker@compute-172-31-252-201:~$ brctl show
bridge name	bridge id		STP enabled	interfaces
br-int		0000.1ee9ef8a284a	no		tap67b22b07-21
							tapefcc735e-10
br0		0000.047d7ba5b328	no		eth0



tap67b22b07-21, tapefcc735e-10   < taps from the two dhcp agents
br0 < bridge to network
br-int < integration bridge


after vm start:

queaker@compute-172-31-252-201:~$ brctl show
bridge name	bridge id		STP enabled	interfaces
br-int		0000.1ee9ef8a284a	no		qvob482e16c-b8
							tap67b22b07-21
							tapefcc735e-10
br0		0000.047d7ba5b328	no		eth0
qbrb482e16c-b8		8000.c67040bd3b43	no		qvbb482e16c-b8
							tapb482e16c-b8

with the bridges and interfaces vor the started vm

queaker@compute-172-31-252-201:~$ sudo ovs-vsctl show
1df3e12e-beb3-437d-9f5e-069dadb5ea27
    Bridge br-int
        Port "tap67b22b07-21"
            tag: 1
            Interface "tap67b22b07-21"
                type: internal
        Port "qvob482e16c-b8"
            tag: 2
            Interface "qvob482e16c-b8"
        Port "tapefcc735e-10"
            tag: 2
            Interface "tapefcc735e-10"
                type: internal
        Port br-int
            Interface br-int
                type: internal
    Bridge "br0"
        Port "eth0"
            Interface "eth0"
        Port "br0"
            Interface "br0"
                type: internal
    ovs_version: "1.4.0+build0"

queaker@compute-172-31-252-201:~$ sudo ovs-ofctl dump-flows br0
NXST_FLOW reply (xid=0x4):
 cookie=0x0, duration=938.502s, table=0, n_packets=188519, n_bytes=157908743, priority=0 actions=NORMAL
queaker@compute-172-31-252-201:~$ sudo ovs-ofctl dump-flows br-int
NXST_FLOW reply (xid=0x4):
 cookie=0x0, duration=906.578s, table=0, n_packets=82, n_bytes=6005, priority=1 actions=NORMAL

root@compute-172-31-252-201:~# neutron net-list
+--------------------------------------+-----------------+------------------------------------------------------+
| id                                   | name            | subnets                                              |
+--------------------------------------+-----------------+------------------------------------------------------+
| 56c0a962-da49-4c16-bd7e-92ffaa0861c0 | Public-External | 45500352-bdf2-4b2e-8eb9-7362f936cb3f 192.26.184.0/22 |
| c5328aac-e5a7-43fb-81ed-63960717e0a5 | Public-Internal | d6845e0b-8a90-4058-b0a3-449864de780d 172.23.56.0/23  |
+--------------------------------------+-----------------+------------------------------------------------------+

root@compute-172-31-252-201:~# neutron  net-show Public-External
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | True                                 |
| id                        | 56c0a962-da49-4c16-bd7e-92ffaa0861c0 |
| name                      | Public-External                      |
| provider:network_type     | vlan                                 |
| provider:physical_network | physnet1                             |
| provider:segmentation_id  | 2502                                 |
| router:external           | True                                 |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   | 45500352-bdf2-4b2e-8eb9-7362f936cb3f |
| tenant_id                 | 26b9c197fd824fc7a836895b8ad70a7c     |
+---------------------------+--------------------------------------+

in /etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini

tenant_network_type = vlan
network_vlan_ranges = physnet1:2501:2505
integration_bridge = br-int
bridge_mappings = physnet1:br0