diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/BridgeConfig.java b/core/api/src/main/java/org/onosproject/net/behaviour/BridgeConfig.java
new file mode 100644
index 0000000..99fe304
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/BridgeConfig.java
@@ -0,0 +1,69 @@
+/*
+ * 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.net.behaviour;
+
+import java.util.Collection;
+
+import org.onosproject.net.device.PortDescription;
+import org.onosproject.net.driver.HandlerBehaviour;
+
+/**
+ * Behaviour for handling various drivers for bridge configurations.
+ */
+public interface BridgeConfig extends HandlerBehaviour {
+
+    /**
+     * Add a bridge.
+     *
+     * @param bridgeName bridge name
+     */
+    void addBridge(BridgeName bridgeName);
+
+    /**
+     * Remove a bridge.
+     *
+     * @param bridgeName bridge name
+     */
+    void deleteBridge(BridgeName bridgeName);
+
+    /**
+     * Remove a bridge.
+     *
+     * @return bridge collection
+     */
+    Collection<BridgeDescription> getBridges();
+
+    /**
+     * Add a logical/virtual port.
+     *
+     * @param port port number
+     */
+    void addPort(PortDescription port);
+
+    /**
+     * Delete a logical/virtual port.
+     *
+     * @param port port number
+     */
+    void deletePort(PortDescription port);
+
+    /**
+     * Delete a logical/virtual port.
+     *
+     * return collection of port
+     */
+    Collection<PortDescription> getPorts();
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/BridgeDescription.java b/core/api/src/main/java/org/onosproject/net/behaviour/BridgeDescription.java
new file mode 100644
index 0000000..3c1d554
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/BridgeDescription.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2014-2015 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.net.behaviour;
+
+import org.onosproject.net.Description;
+import org.onosproject.net.DeviceId;
+
+/**
+ * The abstraction of bridge in OVSDB protocol.
+ */
+public interface BridgeDescription extends Description {
+
+    /**
+     * Returns bridge name.
+     *
+     * @return bridge name
+     */
+    BridgeName bridgeName();
+
+    /**
+     * Returns controller identifier that this bridge belongs to.
+     *
+     * @return controller identifier
+     */
+    DeviceId cotrollerDeviceId();
+
+    /**
+     * Returns bridge identifier .
+     *
+     * @return bridge identifier
+     */
+    DeviceId deviceId();
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/BridgeName.java b/core/api/src/main/java/org/onosproject/net/behaviour/BridgeName.java
new file mode 100644
index 0000000..3f78295
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/BridgeName.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2014-2015 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.net.behaviour;
+
+import java.util.Objects;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Represents for a bridge name.
+ */
+public final class BridgeName {
+
+    private final String name;
+
+    // Public construction is prohibited
+    private BridgeName(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Creates a bridge name using the supplied string.
+     *
+     * @param name bridge name
+     * @return BridgeName
+     */
+    public static BridgeName bridgeName(String name) {
+        return new BridgeName(name);
+    }
+
+    /**
+     * Returns the bridge name string.
+     *
+     * @return name string
+     */
+    public String name() {
+        return name;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof BridgeName) {
+            final BridgeName that = (BridgeName) obj;
+            return this.getClass() == that.getClass() &&
+                    Objects.equals(this.name, that.name);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("name", name)
+                .toString();
+    }
+
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/DefaultBridgeDescription.java b/core/api/src/main/java/org/onosproject/net/behaviour/DefaultBridgeDescription.java
new file mode 100644
index 0000000..6a6f670
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/DefaultBridgeDescription.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2014-2015 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.net.behaviour;
+
+import java.util.Objects;
+
+import org.onosproject.net.AbstractDescription;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.SparseAnnotations;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * The default implementation of bridge.
+ */
+public final class DefaultBridgeDescription extends AbstractDescription
+        implements BridgeDescription {
+
+    private final BridgeName name;
+    private final DeviceId deviceId;
+    private final DeviceId controllerId;
+
+    public DefaultBridgeDescription(BridgeName name, DeviceId controllerId,
+                                    DeviceId deviceId,
+                                    SparseAnnotations... annotations) {
+        super(annotations);
+        this.name = name;
+        this.deviceId = deviceId;
+        this.controllerId = controllerId;
+    }
+
+    @Override
+    public BridgeName bridgeName() {
+        return name;
+    }
+
+    @Override
+    public DeviceId deviceId() {
+        return deviceId;
+    }
+
+    @Override
+    public DeviceId cotrollerDeviceId() {
+        return controllerId;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name, deviceId, controllerId);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof DefaultBridgeDescription) {
+            final DefaultBridgeDescription that = (DefaultBridgeDescription) obj;
+            return this.getClass() == that.getClass()
+                    && Objects.equals(this.name, that.name)
+                    && Objects.equals(this.deviceId, that.deviceId)
+                    && Objects.equals(this.controllerId, that.controllerId);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("name", name)
+                .add("deviceId", deviceId).add("controllerId", controllerId)
+                .toString();
+    }
+
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/DefaultTunnelDescription.java b/core/api/src/main/java/org/onosproject/net/behaviour/DefaultTunnelDescription.java
new file mode 100644
index 0000000..7554a3c
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/DefaultTunnelDescription.java
@@ -0,0 +1,87 @@
+/*
+ * 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.net.behaviour;
+
+import org.onosproject.net.AbstractDescription;
+import org.onosproject.net.SparseAnnotations;
+
+import com.google.common.annotations.Beta;
+import com.google.common.base.MoreObjects;
+
+/**
+ * Default implementation of immutable tunnel description entity.
+ */
+@Beta
+public class DefaultTunnelDescription extends AbstractDescription
+        implements TunnelDescription {
+
+    private final TunnelEndPoint src;
+    private final TunnelEndPoint dst;
+    private final Type type;
+    // which a tunnel match up
+    // tunnel producer
+    private final TunnelName tunnelName; // name of a tunnel
+
+    /**
+     * Creates a tunnel description using the supplied information.
+     *
+     * @param src TunnelPoint source
+     * @param dst TunnelPoint destination
+     * @param type tunnel type
+     * @param tunnelName tunnel name
+     * @param annotations optional key/value annotations
+     */
+    public DefaultTunnelDescription(TunnelEndPoint src,
+                                    TunnelEndPoint dst, Type type,
+                                    TunnelName tunnelName,
+                                    SparseAnnotations... annotations) {
+        super(annotations);
+        this.src = src;
+        this.dst = dst;
+        this.type = type;
+        this.tunnelName = tunnelName;
+    }
+
+    @Override
+    public TunnelEndPoint src() {
+        return src;
+    }
+
+    @Override
+    public TunnelEndPoint dst() {
+        return dst;
+    }
+
+    @Override
+    public Type type() {
+        return type;
+    }
+
+    @Override
+    public TunnelName tunnelName() {
+        return tunnelName;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("src", src())
+                .add("dst", dst())
+                .add("type", type())
+                .add("tunnelName", tunnelName())
+                .toString();
+    }
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/TunnelConfig.java b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelConfig.java
new file mode 100644
index 0000000..a0244cb
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelConfig.java
@@ -0,0 +1,55 @@
+/*
+ * 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.net.behaviour;
+
+import java.util.Collection;
+
+import org.onosproject.net.driver.HandlerBehaviour;
+
+/**
+ * Behaviour for handling various drivers for tunnel configuration.
+ */
+public interface TunnelConfig extends HandlerBehaviour {
+
+    /**
+     * Create a tunnel.
+     *
+     * @param tunnel tunnel entity
+     */
+    void createTunnel(TunnelDescription tunnel);
+
+    /**
+     * Remove a tunnel.
+     *
+     * @param tunnel tunnel entity
+     */
+    void removeTunnel(TunnelDescription tunnel);
+
+    /**
+     * Update a tunnel.
+     *
+     * @param tunnel tunnel entity
+     */
+    void updateTunnel(TunnelDescription tunnel);
+
+    /**
+     * Gets tunnels.
+     *
+     * return collection of tunnel
+     */
+    Collection<TunnelDescription> getTunnels();
+
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/TunnelDescription.java b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelDescription.java
new file mode 100755
index 0000000..b2fb699
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelDescription.java
@@ -0,0 +1,86 @@
+/*
+ * 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.net.behaviour;
+
+import org.onosproject.net.Annotated;
+import org.onosproject.net.Description;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * Describes a tunnel.
+ */
+@Beta
+public interface TunnelDescription extends Description, Annotated {
+
+    /**
+     * Tunnel technology type.
+     */
+    enum Type {
+        /**
+         * Signifies that this is a MPLS tunnel.
+         */
+        MPLS,
+        /**
+         * Signifies that this is a L2 tunnel.
+         */
+        VLAN,
+        /**
+         * Signifies that this is a DC L2 extension tunnel.
+         */
+        VXLAN,
+        /**
+         * Signifies that this is a L3 tunnel.
+         */
+        GRE,
+        /**
+         * Signifies that this is a L1 OTN tunnel.
+         */
+        ODUK,
+        /**
+         * Signifies that this is a L0 OCH tunnel.
+         */
+        OCH
+    }
+
+    /**
+     * Returns the connection point source.
+     *
+     * @return tunnel source ConnectionPoint
+     */
+    TunnelEndPoint src();
+
+    /**
+     * Returns the connection point destination.
+     *
+     * @return tunnel destination
+     */
+    TunnelEndPoint dst();
+
+    /**
+     * Returns the tunnel type.
+     *
+     * @return tunnel type
+     */
+    Type type();
+
+    /**
+     * Return the name of a tunnel.
+     *
+     * @return Tunnel Name
+     */
+    TunnelName tunnelName();
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/TunnelEndPoint.java b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelEndPoint.java
new file mode 100644
index 0000000..c354c38
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelEndPoint.java
@@ -0,0 +1,28 @@
+/*
+ * 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.net.behaviour;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * Represents for source end point or destination end point of a tunnel. Maybe a tunnel
+ * based on ConnectPoint, IpAddress, MacAddress and so on is built.
+ */
+@Beta
+public interface TunnelEndPoint {
+
+}
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/TunnelName.java b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelName.java
new file mode 100644
index 0000000..9be2654
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelName.java
@@ -0,0 +1,79 @@
+/*
+ * 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.net.behaviour;
+
+import com.google.common.annotations.Beta;
+
+import java.util.Objects;
+
+/**
+ * Represents for a unique tunnel name. TunnelId is generated by ONOS while
+ * TunnelName is given by producer. The consumer can borrow tunnels with
+ * TunnelId or TunnelName.
+ */
+@Beta
+public final class TunnelName {
+    private final String str;
+
+    // Default constructor for serialization
+    private TunnelName(String tunnelName) {
+        this.str = tunnelName;
+    }
+
+
+    /**
+     * Creates a tunnel name using the supplied URI string.
+     *
+     * @param tunnelName tunnel name string
+     * @return tunnel name object
+     */
+    public static TunnelName tunnelName(String tunnelName) {
+        return new TunnelName(tunnelName);
+    }
+
+    /**
+     * The string of tunnel name.
+     *
+     * @return the string of tunnel name
+     */
+    public String value() {
+        return str;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(str);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof TunnelName) {
+            final TunnelName that = (TunnelName) obj;
+            return this.getClass() == that.getClass()
+                    && Objects.equals(this.str, that.str);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return str;
+    }
+}