Fix config nodemgr configuration

PROD-21172

Change-Id: Ic77175b6f8027cd1ab4fac809bb6535421bea4e1
diff --git a/README.rst b/README.rst
index d7350c8..e285e13 100644
--- a/README.rst
+++ b/README.rst
@@ -826,8 +826,10 @@
           sync_on_demand: false
       ...
 
-Cassandra listen interface
---------------------------
+Cassandra listen configuration
+------------------------------
+
+Interface example:
 
 .. code-block:: yaml
 
@@ -839,6 +841,21 @@
         rpc_port: 9160
       ....
 
+For running config and analytics db clusters on same hosts, you will need to
+change ports not to collide. The host is required.
+
+    database:
+      ....
+      bind:
+        host: 127.0.0.1
+        port: 9042
+        rpc_port: 9160
+        # for containers we need to move configdb to neighbouring ports
+        port_configdb: 9041
+        rpc_port_configdb: 9161
+      ....
+
+
 OpenContrail WebUI version >= 3.1.1
 -----------------------------------
 For OpenContrail version >= 3.1.1 and Cassandra >= 2.1 we should override WebUI's cassandra port from 9160 to 9042.