diff --git a/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/OvsdbAgent.java b/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/OvsdbAgent.java
new file mode 100644
index 0000000..70ffae8
--- /dev/null
+++ b/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/driver/OvsdbAgent.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015 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.ovsdb.controller.driver;
+
+import org.onosproject.ovsdb.controller.OvsdbNodeId;
+import org.onosproject.ovsdb.controller.OvsdbClientService;
+
+/**
+ * Responsible for keeping track of the current set of nodes connected to the
+ * system.
+ */
+public interface OvsdbAgent {
+    /**
+     * Add a node that has just connected to the system.
+     *
+     * @param nodeId the nodeId to add
+     * @param ovsdbClient the actual node object.
+     */
+    void addConnectedNode(OvsdbNodeId nodeId, OvsdbClientService ovsdbClient);
+
+    /**
+     * Clear all state in controller node maps for a node that has disconnected
+     * from the local controller. Also release control for that node from the
+     * global repository. Notify node listeners.
+     *
+     * @param nodeId the node id to be removed.
+     */
+    void removeConnectedNode(OvsdbNodeId nodeId);
+}