diff --git a/templates/plugins/ml2/ironic_neutron_agent.ini.j2 b/templates/plugins/ml2/ironic_neutron_agent.ini.j2
index a5330f12..2146e3d9 100644
--- a/templates/plugins/ml2/ironic_neutron_agent.ini.j2
+++ b/templates/plugins/ml2/ironic_neutron_agent.ini.j2
@@ -9,3 +9,4 @@ username = ironic
 auth_url = {{ keystone_service_internalurl }}
 auth_type = password
 region_name = {{ ironic_service_region }}
+valid_interfaces = internal