diff --git a/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/manager/SfcService.java b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/manager/SfcService.java
new file mode 100644
index 0000000..ef5fc52
--- /dev/null
+++ b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/manager/SfcService.java
@@ -0,0 +1,70 @@
+/*
+ * 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.sfc.manager;
+
+/**
+ * SFC application that applies flows to the device.
+ */
+public interface SfcService {
+
+    /**
+     * When port-pair is created, check whether Forwarding Rule needs to be
+     * updated in OVS.
+     */
+    public void onPortPairCreated();
+
+    /**
+     * When port-pair is deleted, check whether Forwarding Rule needs to be
+     * updated in OVS.
+     */
+    public void onPortPairDeleted();
+
+    /**
+     * When port-pair-group is created, check whether Forwarding Rule needs to
+     * be updated in OVS.
+     */
+    public void onPortPairGroupCreated();
+
+    /**
+     * When port-pair-group is deleted, check whether Forwarding Rule needs to
+     * be updated in OVS.
+     */
+    public void onPortPairGroupDeleted();
+
+    /**
+     * When flow-classifier is created, check whether Forwarding Rule needs to
+     * be updated in OVS.
+     */
+    public void onFlowClassifierCreated();
+
+    /**
+     * When flow-classifier is deleted, check whether Forwarding Rule needs to
+     * be updated in OVS.
+     */
+    public void onFlowClassifierDeleted();
+
+    /**
+     * When port-chain is created, check whether Forwarding Rule needs to be
+     * updated in OVS.
+     */
+    public void onPortChainCreated();
+
+    /**
+     * When port-chain is deleted, check whether Forwarding Rule needs to be
+     * updated in OVS.
+     */
+    public void onPortChainDeleted();
+}