diff --git a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/ClassifierService.java b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/ClassifierService.java
new file mode 100644
index 0000000..84fcefb
--- /dev/null
+++ b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/ClassifierService.java
@@ -0,0 +1,58 @@
+/*
+ * 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.vtn.table;
+
+import org.onlab.packet.MacAddress;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.flowobjective.Objective;
+import org.onosproject.vtnrsc.SegmentationId;
+
+/**
+ * Applies classifier flows to the device.
+ */
+public interface ClassifierService {
+
+    /**
+     * The port rule that message from host matches Table(0) Match: host mac and
+     * ingress port Action: set vnid and go to table(50).
+     *
+     * @param deviceId Device Id
+     * @param segmentationId the vnid of the host belong to
+     * @param inPort the ingress port of the host
+     * @param srcMac the mac of the host
+     * @param appId the application ID of the vtn
+     * @param type the operation of the flow
+     */
+    void programLocalIn(DeviceId deviceId, SegmentationId segmentationId,
+                        PortNumber inPort, MacAddress srcMac,
+                        ApplicationId appId, Objective.Operation type);
+
+    /**
+     * The port rule that message from tunnel Table(0) Match: tunnel port and
+     * vnid Action: go to table(50).
+     *
+     * @param deviceId Device Id
+     * @param segmentationId the vnid of the host belong to
+     * @param localTunnelPorts the tunnel pors of the device
+     * @param type the operation of the flow
+     */
+    void programTunnelIn(DeviceId deviceId, SegmentationId segmentationId,
+                         Iterable<PortNumber> localTunnelPorts,
+                         Objective.Operation type);
+
+}