core/api/src/main/java/org/onosproject/net/Tunnel.java

/*
 * 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.onosproject.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();

}