diff --git a/apps/castor/src/main/java/org/onosproject/castor/ConnectivityManagerService.java b/apps/castor/src/main/java/org/onosproject/castor/ConnectivityManagerService.java
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+++ b/apps/castor/src/main/java/org/onosproject/castor/ConnectivityManagerService.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.castor;
+
+/**
+ * Service Interface for Connectivity Manager.
+ */
+public interface ConnectivityManagerService {
+
+    /**
+     * Start to add the initial config by adding route servers.
+     *
+     * @param peer The Route Server
+     */
+    void start(Peer peer);
+
+    /**
+     * Sets up connectivity of the peer being added.
+     * This will set up the connectivity between the Peer and the Route Servers.
+     *
+     * @param peer The Peer to be added.
+     */
+    void setUpConnectivity(Peer peer);
+
+    /**
+     * Provisions the layer two flows for the Peer.
+     *
+     * @param peer The Peer for which layer 2 is to be configured.
+     */
+    void setUpL2(Peer peer);
+
+    /**
+     * Deletes a BGP Peer.
+     * This will delete all the flow entries corresponding to the Peer and update the other ones.
+     *
+     * @param peer The Peer to be deleted.
+     */
+    void deletePeer(Peer peer);
+
+}