Add Designate integration

This patch adds Designate support

Change-Id: Ic8391196c0d7eefc6f0ff7b6cc6106d499284e22
Related-PROD: PROD-14689
diff --git a/README.rst b/README.rst
index 57153ed..7da4084 100644
--- a/README.rst
+++ b/README.rst
@@ -992,6 +992,23 @@
               enabled: True
 
 
+
+Neutron with Designate
+-----------------------------------------
+.. code-block:: yaml
+
+    neutron:
+      server:
+        backend:
+          extension:
+            dns:
+              enabled: True
+              host: 127.0.0.1
+              port: 9001
+              protocol: http
+
+
+
 Documentation and Bugs
 ======================