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 ff3c696..96979f5 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
@@ -16,6 +16,7 @@
 package org.onosproject.incubator.net.virtual.impl;
 
 import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
@@ -361,6 +362,24 @@
         return store.getPorts(networkId, deviceId);
     }
 
+    @Override
+    public 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 = Sets.newConcurrentHashSet();
+
+        virtualPortSet.forEach(virtualPort -> {
+            if (virtualPort.realizedBy() != null) {
+                physicalDeviceSet.add(virtualPort.realizedBy().deviceId());
+            }
+        });
+
+        return physicalDeviceSet;
+    }
+
     private final Map<ServiceKey, VnetService> networkServices = Maps.newConcurrentMap();
 
     @Override
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualFlowRuleProviderTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualFlowRuleProviderTest.java
index e268f32..01129af 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualFlowRuleProviderTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualFlowRuleProviderTest.java
@@ -21,25 +21,18 @@
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
-import org.onlab.osgi.ServiceDirectory;
-import org.onlab.packet.IpAddress;
-import org.onlab.packet.MacAddress;
-import org.onlab.packet.VlanId;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.CoreServiceAdapter;
 import org.onosproject.core.DefaultApplicationId;
-import org.onosproject.core.IdGenerator;
 import org.onosproject.incubator.net.virtual.DefaultVirtualDevice;
 import org.onosproject.incubator.net.virtual.DefaultVirtualNetwork;
 import org.onosproject.incubator.net.virtual.DefaultVirtualPort;
 import org.onosproject.incubator.net.virtual.NetworkId;
 import org.onosproject.incubator.net.virtual.TenantId;
 import org.onosproject.incubator.net.virtual.VirtualDevice;
-import org.onosproject.incubator.net.virtual.VirtualHost;
 import org.onosproject.incubator.net.virtual.VirtualLink;
 import org.onosproject.incubator.net.virtual.VirtualNetwork;
-import org.onosproject.incubator.net.virtual.VirtualNetworkAdminService;
-import org.onosproject.incubator.net.virtual.VirtualNetworkListener;
+import org.onosproject.incubator.net.virtual.VirtualNetworkAdminServiceAdapter;
 import org.onosproject.incubator.net.virtual.VirtualPort;
 import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DefaultAnnotations;
@@ -49,8 +42,6 @@
 import org.onosproject.net.DefaultPort;
 import org.onosproject.net.Device;
 import org.onosproject.net.DeviceId;
-import org.onosproject.net.HostId;
-import org.onosproject.net.HostLocation;
 import org.onosproject.net.Link;
 import org.onosproject.net.Path;
 import org.onosproject.net.Port;
@@ -76,7 +67,6 @@
 import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Set;
-import java.util.concurrent.atomic.AtomicLong;
 import java.util.stream.Collectors;
 
 import static org.junit.Assert.assertEquals;
@@ -307,18 +297,6 @@
         public ApplicationId registerApplication(String name) {
             return new TestApplicationId(1, name);
         }
-
-        @Override
-        public IdGenerator getIdGenerator(String topic) {
-            return new IdGenerator() {
-                private AtomicLong counter = new AtomicLong(0);
-
-                @Override
-                public long getNewId() {
-                    return counter.getAndIncrement();
-                }
-            };
-        }
     }
 
     private static class TestApplicationId extends DefaultApplicationId {
@@ -328,12 +306,7 @@
     }
 
     private class TestVirtualNetworkAdminService
-            implements VirtualNetworkAdminService {
-
-        @Override
-        public Set<VirtualNetwork> getVirtualNetworks(TenantId tenantId) {
-            return null;
-        }
+            extends VirtualNetworkAdminServiceAdapter {
 
         @Override
         public Set<VirtualDevice> getVirtualDevices(NetworkId networkId) {
@@ -341,11 +314,6 @@
         }
 
         @Override
-        public Set<VirtualHost> getVirtualHosts(NetworkId networkId) {
-            return null;
-        }
-
-        @Override
         public Set<VirtualLink> getVirtualLinks(NetworkId networkId) {
             return new HashSet<>();
         }
@@ -357,112 +325,9 @@
         }
 
         @Override
-        public <T> T get(NetworkId networkId, Class<T> serviceClass) {
-            return null;
-        }
-
-        @Override
-        public ServiceDirectory getServiceDirectory() {
-            return null;
-        }
-
-        @Override
         public ApplicationId getVirtualNetworkApplicationId(NetworkId networkId) {
             return vAppId;
         }
-
-        @Override
-        public void registerTenantId(TenantId tenantId) {
-
-        }
-
-        @Override
-        public void unregisterTenantId(TenantId tenantId) {
-
-        }
-
-        @Override
-        public Set<TenantId> getTenantIds() {
-            return null;
-        }
-
-        @Override
-        public VirtualNetwork createVirtualNetwork(TenantId tenantId) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualNetwork(NetworkId networkId) {
-
-        }
-
-        @Override
-        public VirtualDevice createVirtualDevice(NetworkId networkId,
-                                                 DeviceId deviceId) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualDevice(NetworkId networkId, DeviceId deviceId) {
-
-        }
-
-        @Override
-        public VirtualHost createVirtualHost(NetworkId networkId, HostId hostId,
-                                             MacAddress mac, VlanId vlan,
-                                             HostLocation location,
-                                             Set<IpAddress> ips) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualHost(NetworkId networkId, HostId hostId) {
-
-        }
-
-        @Override
-        public VirtualLink createVirtualLink(NetworkId networkId,
-                                             ConnectPoint src, ConnectPoint dst) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualLink(NetworkId networkId,
-                                      ConnectPoint src, ConnectPoint dst) {
-
-        }
-
-        @Override
-        public VirtualPort createVirtualPort(NetworkId networkId,
-                                             DeviceId deviceId,
-                                             PortNumber portNumber,
-                                             ConnectPoint realizedBy) {
-            return null;
-        }
-
-        @Override
-        public void bindVirtualPort(NetworkId networkId,
-                                    DeviceId deviceId,
-                                    PortNumber portNumber,
-                                    ConnectPoint realizedBy) {
-
-        }
-
-        @Override
-        public void removeVirtualPort(NetworkId networkId, DeviceId deviceId,
-                                      PortNumber portNumber) {
-
-        }
-
-        @Override
-        public void addListener(VirtualNetworkListener listener) {
-
-        }
-
-        @Override
-        public void removeListener(VirtualNetworkListener listener) {
-
-        }
     }
 
     private static class TestTopologyService extends TopologyServiceAdapter {
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProviderTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProviderTest.java
index 32c6a30..42a3645 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProviderTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/virtual/impl/provider/DefaultVirtualPacketProviderTest.java
@@ -20,10 +20,7 @@
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
-import org.onlab.osgi.ServiceDirectory;
 import org.onlab.packet.Ethernet;
-import org.onlab.packet.IpAddress;
-import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.CoreServiceAdapter;
@@ -34,11 +31,8 @@
 import org.onosproject.incubator.net.virtual.NetworkId;
 import org.onosproject.incubator.net.virtual.TenantId;
 import org.onosproject.incubator.net.virtual.VirtualDevice;
-import org.onosproject.incubator.net.virtual.VirtualHost;
-import org.onosproject.incubator.net.virtual.VirtualLink;
 import org.onosproject.incubator.net.virtual.VirtualNetwork;
-import org.onosproject.incubator.net.virtual.VirtualNetworkAdminService;
-import org.onosproject.incubator.net.virtual.VirtualNetworkListener;
+import org.onosproject.incubator.net.virtual.VirtualNetworkAdminServiceAdapter;
 import org.onosproject.incubator.net.virtual.VirtualPort;
 import org.onosproject.incubator.net.virtual.provider.AbstractVirtualProviderService;
 import org.onosproject.incubator.net.virtual.provider.VirtualPacketProvider;
@@ -50,8 +44,6 @@
 import org.onosproject.net.DefaultPort;
 import org.onosproject.net.Device;
 import org.onosproject.net.DeviceId;
-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;
@@ -263,7 +255,7 @@
     }
 
     private static class TestVirtualNetworkAdminService
-            implements VirtualNetworkAdminService {
+            extends VirtualNetworkAdminServiceAdapter {
 
         @Override
         public Set<VirtualNetwork> getVirtualNetworks(TenantId tenantId) {
@@ -276,133 +268,22 @@
         }
 
         @Override
-        public Set<VirtualHost> getVirtualHosts(NetworkId networkId) {
-            return null;
-        }
-
-        @Override
-        public Set<VirtualLink> getVirtualLinks(NetworkId networkId) {
-            return null;
-        }
-
-        @Override
         public Set<VirtualPort> getVirtualPorts(NetworkId networkId,
                                                 DeviceId deviceId) {
             return ImmutableSet.of(VPORT1, VPORT2);
         }
 
         @Override
-        public <T> T get(NetworkId networkId, Class<T> serviceClass) {
-            return null;
-        }
-
-        @Override
-        public ServiceDirectory getServiceDirectory() {
-            return null;
-        }
-
-        @Override
-        public ApplicationId getVirtualNetworkApplicationId(NetworkId networkId) {
-            return null;
-        }
-
-        @Override
-        public void registerTenantId(TenantId tenantId) {
-
-        }
-
-        @Override
-        public void unregisterTenantId(TenantId tenantId) {
-
-        }
-
-        @Override
         public Set<TenantId> getTenantIds() {
             return ImmutableSet.of(TENANT_ID);
         }
 
-        @Override
-        public VirtualNetwork createVirtualNetwork(TenantId tenantId) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualNetwork(NetworkId networkId) {
-
-        }
-
-        @Override
-        public VirtualDevice createVirtualDevice(NetworkId networkId,
-                                                 DeviceId deviceId) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualDevice(NetworkId networkId, DeviceId deviceId) {
-
-        }
-
-        @Override
-        public VirtualHost createVirtualHost(NetworkId networkId, HostId hostId,
-                                             MacAddress mac, VlanId vlan,
-                                             HostLocation location,
-                                             Set<IpAddress> ips) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualHost(NetworkId networkId, HostId hostId) {
-
-        }
-
-        @Override
-        public VirtualLink createVirtualLink(NetworkId networkId,
-                                             ConnectPoint src, ConnectPoint dst) {
-            return null;
-        }
-
-        @Override
-        public void removeVirtualLink(NetworkId networkId,
-                                      ConnectPoint src, ConnectPoint dst) {
-
-        }
-
-        @Override
-        public VirtualPort createVirtualPort(NetworkId networkId,
-                                             DeviceId deviceId,
-                                             PortNumber portNumber,
-                                             ConnectPoint realizedBy) {
-            return null;
-        }
-
-        @Override
-        public void bindVirtualPort(NetworkId networkId,
-                                    DeviceId deviceId,
-                                    PortNumber portNumber,
-                                    ConnectPoint realizedBy) {
-
-        }
-
-        @Override
-        public void removeVirtualPort(NetworkId networkId, DeviceId deviceId,
-                                      PortNumber portNumber) {
-
-        }
-
-        @Override
-        public void addListener(VirtualNetworkListener listener) {
-
-        }
-
-        @Override
-        public void removeListener(VirtualNetworkListener listener) {
-
-        }
     }
 
     private static class TestVirtualPacketProviderService
             extends AbstractVirtualProviderService<VirtualPacketProvider>
             implements VirtualPacketProviderService {
+
         static List<PacketContext> requestedContext = new LinkedList();
         static List<NetworkId> requestedNetworkId = new LinkedList();
 
@@ -411,11 +292,7 @@
             return null;
         }
 
-        public NetworkId getRequestedNetworkId(int index) {
-            return requestedNetworkId.get(index);
-        }
-
-        public PacketContext getRequestedPacketContext(int index) {
+        PacketContext getRequestedPacketContext(int index) {
             return requestedContext.get(index);
         }
 
@@ -439,15 +316,15 @@
             requestedPacket.add(packet);
         }
 
-        public OutboundPacket getRequestedPacket(int index) {
+        OutboundPacket getRequestedPacket(int index) {
             return requestedPacket.get(index);
         }
 
-        public int getRequestedPacketCount() {
+        int getRequestedPacketCount() {
             return requestedPacket.size();
         }
 
-        public void sendTestPacketContext(PacketContext context) {
+        void sendTestPacketContext(PacketContext context) {
             processor.process(context);
         }
     }