diff --git a/core/api/src/main/java/org/onlab/onos/net/Tunnel.java b/core/api/src/main/java/org/onlab/onos/net/Tunnel.java
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+++ b/core/api/src/main/java/org/onlab/onos/net/Tunnel.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2014 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.onlab.onos.net;
+
+/**
+ * Abstraction of a generalized network tunnel.
+ */
+public interface Tunnel extends Link {
+
+    /**
+     * Tunnel technology type.
+     */
+    enum Type {
+        MPLS, VLAN, VXLAN, GRE, OPTICAL
+    }
+
+    /**
+     * Network resource backing the tunnel, e.g. lambda, VLAN id, MPLS tag.
+     *
+     * @return backing resource
+     */
+    NetworkResource resource();
+
+}