diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkService.java b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkService.java
index 07775dd..06d164c 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkService.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkService.java
@@ -21,8 +21,11 @@
 import org.onosproject.event.ListenerService;
 import org.onosproject.net.DeviceId;
 
+import java.util.HashSet;
 import java.util.Set;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 /**
  * Service for querying virtual network inventory.
  */
@@ -85,6 +88,32 @@
     Set<VirtualPort> getVirtualPorts(NetworkId networkId, DeviceId deviceId);
 
     /**
+     * Returns list of physical device identifier mapping with the virtual
+     * device in the specified network. The physical devices are specified by
+     * port mapping mechanism.
+     *
+     * @param networkId network identifier
+     * @param virtualDevice the virtual device
+     * @return collection of the specified device's identifier
+     */
+    default Set<DeviceId> getPhysicalDevices(NetworkId networkId,
+                                             VirtualDevice virtualDevice) {
+        checkNotNull(networkId, "Network ID cannot be null");
+        checkNotNull(virtualDevice, "Virtual device cannot be null");
+        Set<VirtualPort> virtualPortSet =
+                getVirtualPorts(networkId, virtualDevice.id());
+        Set<DeviceId> physicalDeviceSet = new HashSet<>();
+
+        virtualPortSet.forEach(virtualPort -> {
+            if (virtualPort.realizedBy() != null) {
+                physicalDeviceSet.add(virtualPort.realizedBy().deviceId());
+            }
+        });
+
+        return physicalDeviceSet;
+    }
+
+    /**
      * Returns implementation of the specified service class for operating
      * in the context of the given network.
      * <p>