diff --git a/doc/source/app-openvswitch.rst b/doc/source/app-openvswitch.rst
index 6aa3ccbe..20351ff0 100644
--- a/doc/source/app-openvswitch.rst
+++ b/doc/source/app-openvswitch.rst
@@ -165,6 +165,16 @@ Set the following user variables in your
     network_vlan_ranges: "physnet1:102:199"
     network_mappings: "physnet1:br-provider"
 
+  # When using Open vSwitch, Tenant network is of type vxlan and want
+  # to provide the external network connectivity over flat provider
+  # network, then configure neutron_provider_networks like following.
+  neutron_provider_networks:
+    network_flat_networks: "*"
+    network_types: "vxlan"
+    network_vxlan_ranges: "1:1000"
+    network_mappings: "provider:br-provider"
+    network_interface: eth12
+
 Customization is needed to support additional network types such as vxlan,
 GRE or Geneve. Refer to the `neutron agent configuration
 <https://docs.openstack.org/neutron/latest/configuration/#configuration-reference>`_ for
diff --git a/tasks/providers/ovs_l3_config.yml b/tasks/providers/ovs_l3_config.yml
new file mode 100644
index 00000000..ee46947e
--- /dev/null
+++ b/tasks/providers/ovs_l3_config.yml
@@ -0,0 +1,34 @@
+---
+# Copyright 2018, Ericsson AB and Others
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+- name: Setup External Network Provider Bridge
+  openvswitch_bridge:
+    bridge: "{{ neutron_provider_networks.network_mappings.split(':')[1] }}"
+    state: present
+  when:
+    - neutron_services['neutron-l3-agent']['group'] in group_names
+    - neutron_plugin_type == 'ml2.ovs'
+    - neutron_provider_networks.network_mappings is defined
+
+- name: Add port to External Network Provider Bridge
+  openvswitch_port:
+    bridge: "{{ neutron_provider_networks.network_mappings.split(':')[1] }}"
+    port: "{{ neutron_provider_networks.network_interface }}"
+    state: present
+  when:
+    - neutron_services['neutron-l3-agent']['group'] in group_names
+    - neutron_plugin_type == 'ml2.ovs'
+    - neutron_provider_networks.network_mappings is defined
+    - neutron_provider_networks.network_interface is defined
diff --git a/templates/plugins/ml2/openvswitch_agent.ini.j2 b/templates/plugins/ml2/openvswitch_agent.ini.j2
index 058c8970..91796c3c 100644
--- a/templates/plugins/ml2/openvswitch_agent.ini.j2
+++ b/templates/plugins/ml2/openvswitch_agent.ini.j2
@@ -4,7 +4,10 @@
 {% if neutron_tunnel_types | length > 0 %}
 local_ip = {{ neutron_local_ip }}
 {% endif %}
-{% if neutron_provider_networks.network_mappings is defined and ((neutron_provider_networks.network_mappings | length) > 0) %}
+{% if neutron_plugin_type != 'ml2.ovs' and neutron_provider_networks.network_mappings is defined and ((neutron_provider_networks.network_mappings | length) > 0) %}
+bridge_mappings = {{ neutron_provider_networks.network_mappings }}
+{% endif %}
+{% if neutron_services['neutron-l3-agent']['group'] in group_names and neutron_plugin_type == 'ml2.ovs' and neutron_provider_networks.network_mappings is defined and ((neutron_provider_networks.network_mappings | length) > 0) %}
 bridge_mappings = {{ neutron_provider_networks.network_mappings }}
 {% endif %}