diff --git a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/util/VtnData.java b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/util/VtnData.java
new file mode 100644
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--- /dev/null
+++ b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/util/VtnData.java
@@ -0,0 +1,97 @@
+/*
+ * 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.util;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Port;
+import org.onosproject.net.PortNumber;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.collect.Sets;
+
+/**
+ * VtnData utility class.
+ */
+public final class VtnData {
+
+    private static final Logger log = LoggerFactory.getLogger(VtnData.class);
+    private static final String SWITCH_CHANNEL_ID = "channelId";
+    private static final String PORT_HEAD = "vxlan";
+
+    /**
+     * Constructs a VtnData object. Utility classes should not have a public or
+     * default constructor, otherwise IDE will compile unsuccessfully. This
+     * class should not be instantiated.
+     */
+    private VtnData() {
+    }
+
+    /**
+     * Get the ControllerIp from the device .
+     *
+     * @param device Device
+     * @return Controller Ip
+     */
+    public static String getControllerIpOfSwitch(Device device) {
+        String url = device.annotations().value(SWITCH_CHANNEL_ID);
+        return url.substring(0, url.lastIndexOf(":"));
+    }
+
+    /**
+     * Get the ControllerId from the device .
+     *
+     * @param device Device
+     * @param devices Devices
+     * @return Controller Id
+     */
+    public static DeviceId getControllerId(Device device,
+                                           Iterable<Device> devices) {
+        for (Device d : devices) {
+            if (d.type() == Device.Type.CONTROLLER && d.id().toString()
+                    .contains(getControllerIpOfSwitch(device))) {
+                return d.id();
+            }
+        }
+        log.info("Can not find controller for device : {}", device.id());
+        return null;
+    }
+
+    /**
+     * Get local tunnel ports.
+     *
+     * @param ports Iterable of Port
+     * @return Collection of PortNumber
+     */
+    public static Collection<PortNumber> getLocalTunnelPorts(Iterable<Port> ports) {
+        Collection<PortNumber> localTunnelPorts = new ArrayList<>();
+        Sets.newHashSet(ports).stream()
+                .filter(p -> !p.number().equals(PortNumber.LOCAL))
+                .forEach(p -> {
+                    if (p.annotations().value(AnnotationKeys.PORT_NAME)
+                            .startsWith(PORT_HEAD)) {
+                        localTunnelPorts.add(p.number());
+                    }
+                });
+        return localTunnelPorts;
+    }
+
+}