diff --git a/defaults/main.yml b/defaults/main.yml
index db6fa3a0..204c32dd 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -128,6 +128,7 @@ neutron_plugin_core: "{{ neutron_plugins[neutron_plugin_type].plugin_core }}"
 #   - vpnaas
 #   - metering
 #   - qos
+#   - dns
 # Deprecated: instead of triggering lbaas through neutron_plugin_core it will be triggered when Octavia is installed, neutron_lbaas_namespace var is set to True, or both:
 #   - neutron_lbaas.services.loadbalancer.plugin.LoadBalancerPluginv2 or lbaasv2
 neutron_lbaas_namespace: "{% if 'neutron_lbaas.services.loadbalancer.plugin.LoadBalancerPluginv2' in neutron_plugin_base %}True{% else %}False{% endif %}"
diff --git a/templates/plugins/ml2/ml2_conf.ini.j2 b/templates/plugins/ml2/ml2_conf.ini.j2
index 46324da4..3e33debe 100644
--- a/templates/plugins/ml2/ml2_conf.ini.j2
+++ b/templates/plugins/ml2/ml2_conf.ini.j2
@@ -5,7 +5,7 @@
 type_drivers = {{ neutron_plugins[neutron_plugin_type].drivers_type }}
 tenant_network_types = {{ neutron_provider_networks.network_types if neutron_provider_networks.network_types != '' else 'local' }}
 mechanism_drivers = {{ neutron_ml2_mechanism_drivers }}
-extension_drivers = port_security{% if 'qos' in neutron_plugin_base %},qos{% endif %}
+extension_drivers = port_security{% if 'qos' in neutron_plugin_base %},qos{% endif %}{% if 'dns' in neutron_plugin_base %},dns{% endif %}
 
 {% if neutron_provider_networks.network_flat_networks is defined %}