In vnet CLI, separates virutal port creation and binding operations.
Original usage with specifiying a phyiscal port is also in supporting.

Changes.
1. vnet-create-port allow to create virtual port
   without a specific virtual port
2. vnet-bind-port command is added to newly bind or to update
3. Virtual binding point is changed from Port to ConnectPoint.

Change-Id: I4c8f9a2b9b2786ba519ead3559d7f005390fee86
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/DefaultVirtualPort.java b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/DefaultVirtualPort.java
index 4b72772..8c4488e 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/DefaultVirtualPort.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/DefaultVirtualPort.java
@@ -16,11 +16,11 @@
 
 package org.onosproject.incubator.net.virtual;
 
+import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DefaultAnnotations;
 import org.onosproject.net.DefaultPort;
 import org.onosproject.net.Device;
 import org.onosproject.net.Element;
-import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 
 import java.util.Objects;
@@ -32,11 +32,11 @@
  */
 public final class DefaultVirtualPort extends DefaultPort implements VirtualPort {
 
-
     private final NetworkId networkId;
-    private final Port realizedBy;
+    private final ConnectPoint realizedBy;
 
-    public DefaultVirtualPort(NetworkId networkId, Device device, PortNumber portNumber, Port realizedBy) {
+    public DefaultVirtualPort(NetworkId networkId, Device device,
+                              PortNumber portNumber, ConnectPoint realizedBy) {
         super((Element) device, portNumber, false, DefaultAnnotations.builder().build());
         this.networkId = networkId;
         this.realizedBy = realizedBy;
@@ -47,7 +47,7 @@
     }
 
     @Override
-    public Port realizedBy() {
+    public ConnectPoint realizedBy() {
         return realizedBy;
     }
 
@@ -65,6 +65,7 @@
             DefaultVirtualPort that = (DefaultVirtualPort) obj;
             return super.equals(that) &&
                     Objects.equals(this.networkId, that.networkId) &&
+                    Objects.equals(this.number(), that.number()) &&
                     Objects.equals(this.realizedBy, that.realizedBy);
         }
         return false;
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkAdminService.java b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkAdminService.java
index 04d1911..38e745f 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkAdminService.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkAdminService.java
@@ -23,7 +23,6 @@
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.HostId;
 import org.onosproject.net.HostLocation;
-import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 
 import java.util.Set;
@@ -154,7 +153,19 @@
      * @throws org.onlab.util.ItemNotFoundException if no such network or device is found
      */
     VirtualPort createVirtualPort(NetworkId networkId, DeviceId deviceId,
-                                  PortNumber portNumber, Port realizedBy);
+                                  PortNumber portNumber, ConnectPoint realizedBy);
+
+    /**
+     * Binds an existing virtual port on the specified device.
+     *
+     * @param networkId  network identifier
+     * @param deviceId   virtual device identifier
+     * @param portNumber virtual port number
+     * @param realizedBy underlying physical port using which this virtual port is realized
+     * @throws org.onlab.util.ItemNotFoundException if no such network or device is found
+     */
+    void bindVirtualPort(NetworkId networkId, DeviceId deviceId,
+                                  PortNumber portNumber, ConnectPoint realizedBy);
 
     /**
      * Removes the specified virtual port.
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java
index 5deff3c..516d901 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java
@@ -24,7 +24,6 @@
 import org.onosproject.net.HostId;
 import org.onosproject.net.HostLocation;
 import org.onosproject.net.Link;
-import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.intent.Intent;
 import org.onosproject.net.intent.IntentData;
@@ -156,7 +155,18 @@
      * @return the virtual port
      */
     VirtualPort addPort(NetworkId networkId, DeviceId deviceId,
-                        PortNumber portNumber, Port realizedBy);
+                        PortNumber portNumber, ConnectPoint realizedBy);
+
+    /**
+     * Binds an existing virtual port to the network.
+     *
+     * @param networkId  network identifier
+     * @param deviceId   device identifier
+     * @param portNumber port number
+     * @param realizedBy underlying port which realizes the virtual port
+     */
+     void bindPort(NetworkId networkId, DeviceId deviceId,
+                        PortNumber portNumber, ConnectPoint realizedBy);
 
     /**
      * Removes the specified port from the given device and network.
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualPort.java b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualPort.java
index c83f62b..461c9ce 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualPort.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualPort.java
@@ -16,6 +16,7 @@
 package org.onosproject.incubator.net.virtual;
 
 import com.google.common.annotations.Beta;
+import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.Port;
 
 /**
@@ -29,6 +30,5 @@
      *
      * @return underlying port which realizes this virtual port
      */
-    Port realizedBy();
-
+    ConnectPoint realizedBy();
 }
diff --git a/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/DefaultVirtualPortTest.java b/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/DefaultVirtualPortTest.java
index 6b83e3a..9bc521d 100644
--- a/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/DefaultVirtualPortTest.java
+++ b/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/DefaultVirtualPortTest.java
@@ -18,8 +18,7 @@
 
 import com.google.common.testing.EqualsTester;
 import org.junit.Test;
-import org.onosproject.net.DefaultPort;
-import org.onosproject.net.Port;
+import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.TestDeviceParams;
 
@@ -29,7 +28,6 @@
  * Test of the default virtual port model entity.
  */
 public class DefaultVirtualPortTest extends TestDeviceParams {
-
     /**
      * Checks that the DefaultVirtualPort class is immutable.
      */
@@ -45,18 +43,22 @@
         DefaultVirtualDevice device2 =
                 new DefaultVirtualDevice(NetworkId.networkId(0), DID2);
 
-        Port portA = new DefaultPort(device1, PortNumber.portNumber(1), true);
-        Port portB = new DefaultPort(device1, PortNumber.portNumber(2), true);
-        Port portC = new DefaultPort(device2, PortNumber.portNumber(2), true);
+        ConnectPoint cpA = new ConnectPoint(device1.id(), PortNumber.portNumber(1));
+        ConnectPoint cpB = new ConnectPoint(device1.id(), PortNumber.portNumber(2));
+        ConnectPoint cpC = new ConnectPoint(device2.id(), PortNumber.portNumber(2));
 
         DefaultVirtualPort port1 =
-                new DefaultVirtualPort(NetworkId.networkId(0), device1, PortNumber.portNumber(1), portA);
+                new DefaultVirtualPort(NetworkId.networkId(0), device1,
+                                       PortNumber.portNumber(1), cpA);
         DefaultVirtualPort port2 =
-                new DefaultVirtualPort(NetworkId.networkId(0), device1, PortNumber.portNumber(1), portA);
+                new DefaultVirtualPort(NetworkId.networkId(0), device1,
+                                       PortNumber.portNumber(1), cpA);
         DefaultVirtualPort port3 =
-                new DefaultVirtualPort(NetworkId.networkId(0), device1, PortNumber.portNumber(2), portB);
+                new DefaultVirtualPort(NetworkId.networkId(0), device1,
+                                       PortNumber.portNumber(2), cpB);
         DefaultVirtualPort port4 =
-                new DefaultVirtualPort(NetworkId.networkId(1), device2, PortNumber.portNumber(2), portC);
+                new DefaultVirtualPort(NetworkId.networkId(1), device2,
+                                       PortNumber.portNumber(2), cpC);
 
 
         new EqualsTester().addEqualityGroup(port1, port2).addEqualityGroup(port3)
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java
index 56c4fd5..b75c2d5 100644
--- a/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManager.java
@@ -50,7 +50,6 @@
 import org.onosproject.net.HostId;
 import org.onosproject.net.HostLocation;
 import org.onosproject.net.Link;
-import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.device.DeviceService;
 import org.onosproject.net.host.HostService;
@@ -225,7 +224,8 @@
         Set<VirtualPort> ports = store.getPorts(networkId, virtualCp.deviceId());
         for (VirtualPort port : ports) {
             if (port.number().equals(virtualCp.port())) {
-                return new ConnectPoint(port.realizedBy().element().id(), port.realizedBy().number());
+                return new ConnectPoint(port.realizedBy().deviceId(),
+                                        port.realizedBy().port());
             }
         }
         return null;
@@ -242,8 +242,8 @@
                                                     ConnectPoint physicalCp) {
         Set<VirtualPort> ports = store.getPorts(networkId, null);
         for (VirtualPort port : ports) {
-            if (port.realizedBy().element().id().equals(physicalCp.elementId()) &&
-                    port.realizedBy().number().equals(physicalCp.port())) {
+            if (port.realizedBy().deviceId().equals(physicalCp.elementId()) &&
+                    port.realizedBy().port().equals(physicalCp.port())) {
                 return new ConnectPoint(port.element().id(), port.number());
             }
         }
@@ -260,7 +260,7 @@
 
     @Override
     public VirtualPort createVirtualPort(NetworkId networkId, DeviceId deviceId,
-                                         PortNumber portNumber, Port realizedBy) {
+                                         PortNumber portNumber, ConnectPoint realizedBy) {
         checkNotNull(networkId, NETWORK_NULL);
         checkNotNull(deviceId, DEVICE_NULL);
         checkNotNull(portNumber, "Port description cannot be null");
@@ -268,6 +268,17 @@
     }
 
     @Override
+    public void bindVirtualPort(NetworkId networkId, DeviceId deviceId,
+                PortNumber portNumber, ConnectPoint realizedBy) {
+        checkNotNull(networkId, NETWORK_NULL);
+        checkNotNull(deviceId, DEVICE_NULL);
+        checkNotNull(portNumber, "Port description cannot be null");
+        checkNotNull(realizedBy, "Physical port description cannot be null");
+
+        store.bindPort(networkId, deviceId, portNumber, realizedBy);
+    }
+
+    @Override
     public void removeVirtualPort(NetworkId networkId, DeviceId deviceId, PortNumber portNumber) {
         checkNotNull(networkId, NETWORK_NULL);
         checkNotNull(deviceId, DEVICE_NULL);
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkDeviceServiceTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkDeviceServiceTest.java
index d44d038..b682d05 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkDeviceServiceTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkDeviceServiceTest.java
@@ -30,11 +30,10 @@
 import org.onosproject.incubator.net.virtual.VirtualNetwork;
 import org.onosproject.incubator.net.virtual.VirtualPort;
 import org.onosproject.incubator.store.virtual.impl.DistributedVirtualNetworkStore;
-import org.onosproject.net.DefaultPort;
+import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.Device;
 import org.onosproject.net.MastershipRole;
 import org.onosproject.net.NetTestTools;
-import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.TestDeviceParams;
 import org.onosproject.net.device.DeviceService;
@@ -232,10 +231,10 @@
 
         DeviceService deviceService = manager.get(virtualNetwork.id(), DeviceService.class);
 
-        Port port = new DefaultPort(virtualDevice, PortNumber.portNumber(1), true);
+        ConnectPoint cp = new ConnectPoint(virtualDevice.id(), PortNumber.portNumber(1));
 
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice.id(), PortNumber.portNumber(1), port);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice.id(), PortNumber.portNumber(2), port);
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice.id(), PortNumber.portNumber(1), cp);
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice.id(), PortNumber.portNumber(2), cp);
 
         // test the getPorts() method
         assertEquals("The port set size did not match.", 2,
@@ -256,11 +255,11 @@
 
         DeviceService deviceService = manager.get(virtualNetwork.id(), DeviceService.class);
 
-        Port port = new DefaultPort(virtualDevice, PortNumber.portNumber(1), true);
+        ConnectPoint cp = new ConnectPoint(virtualDevice.id(), PortNumber.portNumber(1));
 
         VirtualPort virtualPort1 = manager.createVirtualPort(virtualNetwork.id(), virtualDevice.id(),
-                                                             PortNumber.portNumber(1), port);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice.id(), PortNumber.portNumber(2), port);
+                                                             PortNumber.portNumber(1), cp);
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice.id(), PortNumber.portNumber(2), cp);
 
         // test the getPort() method
         assertEquals("The port did not match as expected.", virtualPort1,
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkIntentServiceTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkIntentServiceTest.java
index 9f5eb61..1e7625d 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkIntentServiceTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkIntentServiceTest.java
@@ -180,28 +180,28 @@
                 manager.createVirtualDevice(virtualNetwork.id(), DID4);
 
         Port port1 = new DefaultPort(virtualDevice1, PortNumber.portNumber(1), true);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(), port1.number(), port1);
         cp1 = new ConnectPoint(virtualDevice1.id(), port1.number());
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(), port1.number(), cp1);
 
         Port port2 = new DefaultPort(virtualDevice1, PortNumber.portNumber(2), true);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(), port2.number(), port2);
         cp2 = new ConnectPoint(virtualDevice1.id(), port2.number());
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(), port2.number(), cp2);
 
         Port port3 = new DefaultPort(virtualDevice2, PortNumber.portNumber(3), true);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(), port3.number(), port3);
         cp3 = new ConnectPoint(virtualDevice2.id(), port3.number());
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(), port3.number(), cp3);
 
         Port port4 = new DefaultPort(virtualDevice2, PortNumber.portNumber(4), true);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(), port4.number(), port4);
         cp4 = new ConnectPoint(virtualDevice2.id(), port4.number());
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(), port4.number(), cp4);
 
         Port port5 = new DefaultPort(virtualDevice3, PortNumber.portNumber(5), true);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(), port5.number(), port5);
         cp5 = new ConnectPoint(virtualDevice3.id(), port5.number());
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(), port5.number(), cp5);
 
         Port port6 = new DefaultPort(virtualDevice3, PortNumber.portNumber(6), true);
-        manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(), port6.number(), port6);
         cp6 = new ConnectPoint(virtualDevice3.id(), port6.number());
+        manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(), port6.number(), cp6);
 
         link1 = manager.createVirtualLink(virtualNetwork.id(), cp1, cp3);
         virtualNetworkManagerStore.updateLink(link1, link1.tunnelId(), Link.State.ACTIVE);
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkLinkServiceTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkLinkServiceTest.java
index 82c7044..53b21d7 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkLinkServiceTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkLinkServiceTest.java
@@ -31,7 +31,6 @@
 import org.onosproject.incubator.net.virtual.VirtualNetwork;
 import org.onosproject.incubator.store.virtual.impl.DistributedVirtualNetworkStore;
 import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.DefaultPort;
 import org.onosproject.net.Link;
 import org.onosproject.net.NetTestTools;
 import org.onosproject.net.PortNumber;
@@ -99,11 +98,11 @@
                 manager.createVirtualDevice(virtualNetwork.id(), DID2);
         ConnectPoint src = new ConnectPoint(srcVirtualDevice.id(), PortNumber.portNumber(1));
         manager.createVirtualPort(virtualNetwork.id(), src.deviceId(), src.port(),
-                                  new DefaultPort(srcVirtualDevice, src.port(), true));
+                                  new ConnectPoint(srcVirtualDevice.id(), src.port()));
 
         ConnectPoint dst = new ConnectPoint(dstVirtualDevice.id(), PortNumber.portNumber(2));
         manager.createVirtualPort(virtualNetwork.id(), dst.deviceId(), dst.port(),
-                                  new DefaultPort(dstVirtualDevice, dst.port(), true));
+                                  new ConnectPoint(dstVirtualDevice.id(), dst.port()));
 
         VirtualLink link1 = manager.createVirtualLink(virtualNetwork.id(), src, dst);
         VirtualLink link2 = manager.createVirtualLink(virtualNetwork.id(), dst, src);
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManagerTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManagerTest.java
index 644ba0c..81fbdf5 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManagerTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkManagerTest.java
@@ -42,11 +42,9 @@
 import org.onosproject.incubator.net.virtual.VirtualPort;
 import org.onosproject.incubator.store.virtual.impl.DistributedVirtualNetworkStore;
 import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.DefaultPort;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.Link;
 import org.onosproject.net.NetTestTools;
-import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.TestDeviceParams;
 import org.onosproject.net.intent.FakeIntentManager;
@@ -321,11 +319,11 @@
                 manager.createVirtualDevice(virtualNetwork1.id(), DID2);
         ConnectPoint src = new ConnectPoint(srcVirtualDevice.id(), PortNumber.portNumber(1));
         manager.createVirtualPort(virtualNetwork1.id(), src.deviceId(), src.port(),
-                                  new DefaultPort(srcVirtualDevice, src.port(), true));
+                                  new ConnectPoint(srcVirtualDevice.id(), src.port()));
 
         ConnectPoint dst = new ConnectPoint(dstVirtualDevice.id(), PortNumber.portNumber(2));
         manager.createVirtualPort(virtualNetwork1.id(), dst.deviceId(), dst.port(),
-                                  new DefaultPort(dstVirtualDevice, dst.port(), true));
+                                  new ConnectPoint(dstVirtualDevice.id(), dst.port()));
 
         manager.createVirtualLink(virtualNetwork1.id(), src, dst);
         manager.createVirtualLink(virtualNetwork1.id(), dst, src);
@@ -362,11 +360,11 @@
                 manager.createVirtualDevice(virtualNetwork1.id(), DID2);
         ConnectPoint src = new ConnectPoint(srcVirtualDevice.id(), PortNumber.portNumber(1));
         manager.createVirtualPort(virtualNetwork1.id(), src.deviceId(), src.port(),
-                                  new DefaultPort(srcVirtualDevice, src.port(), true));
+                                  new ConnectPoint(srcVirtualDevice.id(), src.port()));
 
         ConnectPoint dst = new ConnectPoint(dstVirtualDevice.id(), PortNumber.portNumber(2));
         manager.createVirtualPort(virtualNetwork1.id(), dst.deviceId(), dst.port(),
-                                  new DefaultPort(dstVirtualDevice, dst.port(), true));
+                                  new ConnectPoint(dstVirtualDevice.id(), dst.port()));
 
         manager.createVirtualLink(virtualNetwork1.id(), src, dst);
         manager.createVirtualLink(virtualNetwork1.id(), src, dst);
@@ -381,16 +379,15 @@
         VirtualNetwork virtualNetwork1 = manager.createVirtualNetwork(TenantId.tenantId(tenantIdValue1));
         VirtualDevice virtualDevice =
                 manager.createVirtualDevice(virtualNetwork1.id(), DID1);
-        Port port = new DefaultPort(virtualDevice, PortNumber.portNumber(1), true);
+        ConnectPoint cp = new ConnectPoint(virtualDevice.id(), PortNumber.portNumber(1));
 
-        manager.createVirtualPort(virtualNetwork1.id(), virtualDevice.id(), PortNumber.portNumber(1), port);
-        manager.createVirtualPort(virtualNetwork1.id(), virtualDevice.id(), PortNumber.portNumber(2), port);
+        manager.createVirtualPort(virtualNetwork1.id(), virtualDevice.id(), PortNumber.portNumber(1), cp);
+        manager.createVirtualPort(virtualNetwork1.id(), virtualDevice.id(), PortNumber.portNumber(2), cp);
 
         Set<VirtualPort> virtualPorts = manager.getVirtualPorts(virtualNetwork1.id(), virtualDevice.id());
         assertNotNull("The virtual port set should not be null", virtualPorts);
         assertEquals("The virtual port set size did not match.", 2, virtualPorts.size());
 
-
         for (VirtualPort virtualPort : virtualPorts) {
             manager.removeVirtualPort(virtualNetwork1.id(),
                                       (DeviceId) virtualPort.element().id(), virtualPort.number());
@@ -403,7 +400,7 @@
 
         // Add/remove the virtual port again.
         VirtualPort virtualPort = manager.createVirtualPort(virtualNetwork1.id(), virtualDevice.id(),
-                                                            PortNumber.portNumber(1), port);
+                                                            PortNumber.portNumber(1), cp);
         manager.removeVirtualPort(virtualNetwork1.id(), (DeviceId) virtualPort.element().id(), virtualPort.number());
         virtualPorts = manager.getVirtualPorts(virtualNetwork1.id(), virtualDevice.id());
         assertTrue("The virtual port set should be empty.", virtualPorts.isEmpty());
@@ -519,48 +516,39 @@
 
         ConnectPoint cp1 = new ConnectPoint(virtualDevice1.id(), PortNumber.portNumber(1));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(),
-                                  PortNumber.portNumber(1),
-                                  new DefaultPort(virtualDevice1, PortNumber.portNumber(1), true));
+                                  PortNumber.portNumber(1), cp1);
 
         ConnectPoint cp2 = new ConnectPoint(virtualDevice1.id(), PortNumber.portNumber(2));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(),
-                                  PortNumber.portNumber(2),
-                                  new DefaultPort(virtualDevice1, PortNumber.portNumber(2), true));
+                                  PortNumber.portNumber(2), cp2);
 
         ConnectPoint cp3 = new ConnectPoint(virtualDevice2.id(), PortNumber.portNumber(3));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(),
-                                  PortNumber.portNumber(3),
-                                  new DefaultPort(virtualDevice2, PortNumber.portNumber(3), true));
+                                  PortNumber.portNumber(3), cp3);
 
         ConnectPoint cp4 = new ConnectPoint(virtualDevice2.id(), PortNumber.portNumber(4));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(),
-                                  PortNumber.portNumber(4),
-                                  new DefaultPort(virtualDevice2, PortNumber.portNumber(4), true));
+                                  PortNumber.portNumber(4), cp4);
 
         ConnectPoint cp5 = new ConnectPoint(virtualDevice3.id(), PortNumber.portNumber(5));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(),
-                                  PortNumber.portNumber(5),
-                                  new DefaultPort(virtualDevice3, PortNumber.portNumber(5), true));
+                                  PortNumber.portNumber(5), cp5);
 
         cp6 = new ConnectPoint(virtualDevice3.id(), PortNumber.portNumber(6));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(),
-                                  PortNumber.portNumber(6),
-                                  new DefaultPort(virtualDevice3, PortNumber.portNumber(6), true));
+                                  PortNumber.portNumber(6), cp6);
 
         cp7 = new ConnectPoint(virtualDevice4.id(), PortNumber.portNumber(7));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice4.id(),
-                                  PortNumber.portNumber(7),
-                                  new DefaultPort(virtualDevice4, PortNumber.portNumber(7), true));
+                                  PortNumber.portNumber(7), cp7);
 
         ConnectPoint cp8 = new ConnectPoint(virtualDevice4.id(), PortNumber.portNumber(8));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice4.id(),
-                                  PortNumber.portNumber(8),
-                                  new DefaultPort(virtualDevice4, PortNumber.portNumber(8), true));
+                                  PortNumber.portNumber(8), cp8);
 
         ConnectPoint cp9 = new ConnectPoint(virtualDevice5.id(), PortNumber.portNumber(9));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice5.id(),
-                                  PortNumber.portNumber(9),
-                                  new DefaultPort(virtualDevice5, PortNumber.portNumber(9), true));
+                                  PortNumber.portNumber(9), cp9);
 
         VirtualLink link1 = manager.createVirtualLink(virtualNetwork.id(), cp1, cp3);
         virtualNetworkManagerStore.updateLink(link1, link1.tunnelId(), Link.State.ACTIVE);
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkPathServiceTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkPathServiceTest.java
index 6e5f4e8..9a1faf7 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkPathServiceTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkPathServiceTest.java
@@ -28,7 +28,6 @@
 import org.onosproject.incubator.net.virtual.VirtualNetwork;
 import org.onosproject.incubator.store.virtual.impl.DistributedVirtualNetworkStore;
 import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.DefaultPort;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.DisjointPath;
 import org.onosproject.net.ElementId;
@@ -141,7 +140,7 @@
             VirtualNetwork vnet, VirtualDevice vDev, long portNumber) {
         ConnectPoint cp = new ConnectPoint(vDev.id(), PortNumber.portNumber(portNumber));
         manager.createVirtualPort(vnet.id(), cp.deviceId(), cp.port(),
-                                  new DefaultPort(vDev, cp.port(), true));
+                                  new ConnectPoint(vDev.id(), cp.port()));
         return cp;
     }
 
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyProviderTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyProviderTest.java
index 6f53387..d95aaf2 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyProviderTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyProviderTest.java
@@ -36,7 +36,6 @@
 import org.onosproject.incubator.net.virtual.VirtualNetworkProviderService;
 import org.onosproject.incubator.store.virtual.impl.DistributedVirtualNetworkStore;
 import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.DefaultPort;
 import org.onosproject.net.Link;
 import org.onosproject.net.NetTestTools;
 import org.onosproject.net.PortNumber;
@@ -152,48 +151,39 @@
 
         cp1 = new ConnectPoint(virtualDevice1.id(), PortNumber.portNumber(1));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(),
-                                  PortNumber.portNumber(1),
-                                  new DefaultPort(virtualDevice1, PortNumber.portNumber(1), true));
+                                  PortNumber.portNumber(1), cp1);
 
         cp2 = new ConnectPoint(virtualDevice1.id(), PortNumber.portNumber(2));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice1.id(),
-                                  PortNumber.portNumber(2),
-                                  new DefaultPort(virtualDevice1, PortNumber.portNumber(2), true));
+                                  PortNumber.portNumber(2), cp2);
 
         cp3 = new ConnectPoint(virtualDevice2.id(), PortNumber.portNumber(3));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(),
-                                  PortNumber.portNumber(3),
-                                  new DefaultPort(virtualDevice2, PortNumber.portNumber(3), true));
+                                  PortNumber.portNumber(3), cp3);
 
         cp4 = new ConnectPoint(virtualDevice2.id(), PortNumber.portNumber(4));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice2.id(),
-                                  PortNumber.portNumber(4),
-                                  new DefaultPort(virtualDevice2, PortNumber.portNumber(4), true));
+                                  PortNumber.portNumber(4), cp4);
 
         cp5 = new ConnectPoint(virtualDevice3.id(), PortNumber.portNumber(5));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(),
-                                  PortNumber.portNumber(5),
-                                  new DefaultPort(virtualDevice3, PortNumber.portNumber(5), true));
+                                  PortNumber.portNumber(5), cp5);
 
         cp6 = new ConnectPoint(virtualDevice3.id(), PortNumber.portNumber(6));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice3.id(),
-                                  PortNumber.portNumber(6),
-                                  new DefaultPort(virtualDevice3, PortNumber.portNumber(6), true));
+                                  PortNumber.portNumber(6), cp6);
 
         cp7 = new ConnectPoint(virtualDevice4.id(), PortNumber.portNumber(7));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice4.id(),
-                                  PortNumber.portNumber(7),
-                                  new DefaultPort(virtualDevice4, PortNumber.portNumber(7), true));
+                                  PortNumber.portNumber(7), cp7);
 
         cp8 = new ConnectPoint(virtualDevice4.id(), PortNumber.portNumber(8));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice4.id(),
-                                  PortNumber.portNumber(8),
-                                  new DefaultPort(virtualDevice4, PortNumber.portNumber(8), true));
+                                  PortNumber.portNumber(8), cp8);
 
         cp9 = new ConnectPoint(virtualDevice5.id(), PortNumber.portNumber(9));
         manager.createVirtualPort(virtualNetwork.id(), virtualDevice5.id(),
-                                  PortNumber.portNumber(9),
-                                  new DefaultPort(virtualDevice5, PortNumber.portNumber(9), true));
+                                  PortNumber.portNumber(9), cp9);
 
         VirtualLink link1 = manager.createVirtualLink(virtualNetwork.id(), cp1, cp3);
         virtualNetworkManagerStore.updateLink(link1, link1.tunnelId(), Link.State.ACTIVE);
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyServiceTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyServiceTest.java
index 267e012..35ed039 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyServiceTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/VirtualNetworkTopologyServiceTest.java
@@ -31,7 +31,6 @@
 import org.onosproject.incubator.net.virtual.VirtualNetwork;
 import org.onosproject.incubator.store.virtual.impl.DistributedVirtualNetworkStore;
 import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.DefaultPort;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.DisjointPath;
 import org.onosproject.net.Link;
@@ -109,28 +108,22 @@
                 manager.createVirtualDevice(virtualNetwork.id(), DID4);
 
         ConnectPoint cp1 = new ConnectPoint(virtualDevice1.id(), PortNumber.portNumber(1));
-        manager.createVirtualPort(virtualNetwork.id(), cp1.deviceId(), cp1.port(),
-                                  new DefaultPort(virtualDevice1, cp1.port(), true));
+        manager.createVirtualPort(virtualNetwork.id(), cp1.deviceId(), cp1.port(), cp1);
 
         ConnectPoint cp2 = new ConnectPoint(virtualDevice1.id(), PortNumber.portNumber(2));
-        manager.createVirtualPort(virtualNetwork.id(), cp2.deviceId(), cp2.port(),
-                                  new DefaultPort(virtualDevice1, cp2.port(), true));
+        manager.createVirtualPort(virtualNetwork.id(), cp2.deviceId(), cp2.port(), cp2);
 
         ConnectPoint cp3 = new ConnectPoint(virtualDevice2.id(), PortNumber.portNumber(3));
-        manager.createVirtualPort(virtualNetwork.id(), cp3.deviceId(), cp3.port(),
-                                  new DefaultPort(virtualDevice2, cp3.port(), true));
+        manager.createVirtualPort(virtualNetwork.id(), cp3.deviceId(), cp3.port(), cp3);
 
         ConnectPoint cp4 = new ConnectPoint(virtualDevice2.id(), PortNumber.portNumber(4));
-        manager.createVirtualPort(virtualNetwork.id(), cp4.deviceId(), cp4.port(),
-                                  new DefaultPort(virtualDevice2, cp4.port(), true));
+        manager.createVirtualPort(virtualNetwork.id(), cp4.deviceId(), cp4.port(), cp4);
 
         ConnectPoint cp5 = new ConnectPoint(virtualDevice3.id(), PortNumber.portNumber(5));
-        manager.createVirtualPort(virtualNetwork.id(), cp5.deviceId(), cp5.port(),
-                                  new DefaultPort(virtualDevice3, cp5.port(), true));
+        manager.createVirtualPort(virtualNetwork.id(), cp5.deviceId(), cp5.port(), cp5);
 
         ConnectPoint cp6 = new ConnectPoint(virtualDevice3.id(), PortNumber.portNumber(6));
-        manager.createVirtualPort(virtualNetwork.id(), cp6.deviceId(), cp6.port(),
-                                  new DefaultPort(virtualDevice3, cp6.port(), true));
+        manager.createVirtualPort(virtualNetwork.id(), cp6.deviceId(), cp6.port(), cp6);
 
         VirtualLink link1 = manager.createVirtualLink(virtualNetwork.id(), cp1, cp3);
         virtualNetworkManagerStore.updateLink(link1, link1.tunnelId(), Link.State.ACTIVE);
@@ -197,11 +190,11 @@
         topology = topologyService.currentTopology();
         ConnectPoint src = new ConnectPoint(srcVirtualDevice.id(), PortNumber.portNumber(1));
         manager.createVirtualPort(virtualNetwork.id(), src.deviceId(), src.port(),
-                                  new DefaultPort(srcVirtualDevice, src.port(), true));
+                                  new ConnectPoint(srcVirtualDevice.id(), src.port()));
 
         ConnectPoint dst = new ConnectPoint(dstVirtualDevice.id(), PortNumber.portNumber(2));
         manager.createVirtualPort(virtualNetwork.id(), dst.deviceId(), dst.port(),
-                                  new DefaultPort(dstVirtualDevice, dst.port(), true));
+                                  new ConnectPoint(dstVirtualDevice.id(), dst.port()));
         VirtualLink link1 = manager.createVirtualLink(virtualNetwork.id(), src, dst);
 
         // test the isLatest() method where a new link has been added to the current topology.
diff --git a/incubator/store/src/main/java/org/onosproject/incubator/store/virtual/impl/DistributedVirtualNetworkStore.java b/incubator/store/src/main/java/org/onosproject/incubator/store/virtual/impl/DistributedVirtualNetworkStore.java
index eb4e8b3..9007c21 100644
--- a/incubator/store/src/main/java/org/onosproject/incubator/store/virtual/impl/DistributedVirtualNetworkStore.java
+++ b/incubator/store/src/main/java/org/onosproject/incubator/store/virtual/impl/DistributedVirtualNetworkStore.java
@@ -53,7 +53,6 @@
 import org.onosproject.net.HostId;
 import org.onosproject.net.HostLocation;
 import org.onosproject.net.Link;
-import org.onosproject.net.Port;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.intent.Intent;
 import org.onosproject.net.intent.IntentData;
@@ -517,21 +516,53 @@
     }
 
     @Override
-    public VirtualPort addPort(NetworkId networkId, DeviceId deviceId, PortNumber portNumber, Port realizedBy) {
+    public VirtualPort addPort(NetworkId networkId, DeviceId deviceId,
+                               PortNumber portNumber, ConnectPoint realizedBy) {
         checkState(networkExists(networkId), "The network has not been added.");
         Set<VirtualPort> virtualPortSet = networkIdVirtualPortSetMap.get(networkId);
+
         if (virtualPortSet == null) {
             virtualPortSet = new HashSet<>();
         }
+
         Device device = deviceIdVirtualDeviceMap.get(deviceId);
         checkNotNull(device, "The device has not been created for deviceId: " + deviceId);
-        VirtualPort virtualPort = new DefaultVirtualPort(networkId, device, portNumber, realizedBy);
+
+        boolean exist = virtualPortSet.stream().anyMatch(
+                p -> p.element().id().equals(deviceId) &&
+                        p.number().equals(portNumber));
+        checkState(!exist, "The requested Port Number is already in use");
+
+        VirtualPort virtualPort = new DefaultVirtualPort(networkId, device,
+                                                         portNumber, realizedBy);
         virtualPortSet.add(virtualPort);
         networkIdVirtualPortSetMap.put(networkId, virtualPortSet);
         return virtualPort;
     }
 
     @Override
+    public void bindPort(NetworkId networkId, DeviceId deviceId,
+                         PortNumber portNumber, ConnectPoint realizedBy) {
+
+        Set<VirtualPort> virtualPortSet = networkIdVirtualPortSetMap
+                .get(networkId);
+
+        VirtualPort vPort = virtualPortSet.stream().filter(
+                p -> p.element().id().equals(deviceId) &&
+                        p.number().equals(portNumber)).findFirst().get();
+        checkNotNull(vPort, "The virtual port has not been added.");
+
+        Device device = deviceIdVirtualDeviceMap.get(deviceId);
+        checkNotNull(device, "The device has not been created for deviceId: "
+                + deviceId);
+
+        virtualPortSet.remove(vPort);
+        vPort = new DefaultVirtualPort(networkId, device, portNumber, realizedBy);
+        virtualPortSet.add(vPort);
+        networkIdVirtualPortSetMap.put(networkId, virtualPortSet);
+    }
+
+    @Override
     public void removePort(NetworkId networkId, DeviceId deviceId, PortNumber portNumber) {
         checkState(networkExists(networkId), "The network has not been added.");