diff --git a/apps/tenbi/topology/src/main/java/org/onosproject/tenbi/topology/impl/TeTopologyNbiManager.java b/apps/tenbi/topology/src/main/java/org/onosproject/tenbi/topology/impl/TeTopologyNbiManager.java
new file mode 100644
index 0000000..799f4ed
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+++ b/apps/tenbi/topology/src/main/java/org/onosproject/tenbi/topology/impl/TeTopologyNbiManager.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2016 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.tenbi.topology.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onosproject.event.AbstractListenerManager;
+import org.onosproject.tetopology.management.api.TeTopologyService;
+import org.onosproject.teyang.api.OperationType;
+import org.onosproject.teyang.utils.topology.NetworkConverter;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev20151208.IetfNetwork;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev20151208.IetfNetworkOpParam;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev20151208.IetfNetworkService;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev20151208.ietfnetwork.Networks;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev20151208.ietfnetwork.NetworksState;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev20151208.IetfNetworkTopology;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev20151208
+               .IetfNetworkTopologyOpParam;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev20151208
+               .IetfNetworkTopologyService;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.te.topology.rev20160708.IetfTeTopology;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.te.topology.rev20160708.IetfTeTopologyOpParam;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.te.topology.rev20160708
+               .IetfTeTopologyService;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.te.topology.rev20160708
+               .ietftetopology.IetfTeTopologyEvent;
+import org.onosproject.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.te.topology.rev20160708
+               .ietftetopology.IetfTeTopologyEventListener;
+import org.onosproject.yms.ymsm.YmsService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * The IETF TE Topology NBI Manager implementation.
+ */
+@Component(immediate = true)
+@Service
+public class TeTopologyNbiManager
+    extends  AbstractListenerManager<IetfTeTopologyEvent, IetfTeTopologyEventListener>
+    implements IetfNetworkService, IetfNetworkTopologyService, IetfTeTopologyService {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected TeTopologyService teTopologyService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected YmsService ymsService;
+
+    @Activate
+    protected void activate() {
+        // Register 3 services with YMS.
+        ymsService.registerService(this, IetfNetworkService.class, null);
+        ymsService.registerService(this, IetfNetworkTopologyService.class, null);
+        ymsService.registerService(this, IetfTeTopologyService.class, null);
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        // Unregister 3 services.
+        ymsService.unRegisterService(this, IetfNetworkService.class);
+        ymsService.unRegisterService(this, IetfNetworkTopologyService.class);
+        ymsService.unRegisterService(this, IetfTeTopologyService.class);
+
+        log.info("Stopped");
+    }
+
+    @Override
+    public IetfNetwork getIetfNetwork(IetfNetworkOpParam ietfNetwork) {
+        log.info("getIetfNetwork: input {}", ietfNetwork);
+
+        checkNotNull(ietfNetwork, "getIetfNetwork: ietfNetwork cannot be null");
+
+        // Get the entire data tree from TE Subsystem core.
+        org.onosproject.tetopology.management.api.Networks teNetworks = teTopologyService.getNetworks();
+
+        // Convert the TE Subsystem core data into YANG Objects.
+        Networks networks = NetworkConverter.teSubsystem2YangNetworks(teNetworks, OperationType.QUERY);
+        NetworksState networkStates = NetworkConverter.teSubsystem2YangNetworkStates(teNetworks, OperationType.QUERY);
+
+        IetfNetworkOpParam.IetfNetworkBuilder builder =  new IetfNetworkOpParam.IetfNetworkBuilder();
+        IetfNetwork newNetwork = builder.networks(networks)
+                                        .networksState(networkStates)
+                                        .onosYangNodeOperationType(IetfNetworkOpParam.OnosYangNodeOperationType.NONE)
+                                        .build();
+
+        // processSubtreeFiltering() filters the entire data tree based on the
+        // user's query and returns the filtered data.
+        return ietfNetwork.processSubtreeFiltering(newNetwork, false);
+    }
+
+    @Override
+    public void setIetfNetwork(IetfNetworkOpParam ietfNetwork) {
+        // In H release, topology is discovered from south, no NBI Set is supported.
+    }
+
+    @Override
+    public IetfTeTopology getIetfTeTopology(IetfTeTopologyOpParam ietfTeTopology) {
+        // unused method.
+        return ietfTeTopology;
+    }
+
+    @Override
+    public void setIetfTeTopology(IetfTeTopologyOpParam ietfTeTopology) {
+        // unused methods.
+    }
+
+    @Override
+    public IetfTeTopology getAugmentedIetfTeTopologyTeLinkEvent(IetfTeTopologyOpParam ietfTeTopology) {
+        // unused methods.
+        return ietfTeTopology;
+    }
+
+    @Override
+    public void setAugmentedIetfTeTopologyTeLinkEvent(IetfTeTopologyOpParam augmentedIetfTeTopologyTeLinkEvent) {
+        // unused methods.
+    }
+
+    @Override
+    public IetfNetworkTopology getIetfNetworkTopology(IetfNetworkTopologyOpParam ietfNetworkTopology) {
+        // unused methods.
+       return ietfNetworkTopology;
+    }
+
+    @Override
+    public void setIetfNetworkTopology(IetfNetworkTopologyOpParam ietfNetworkTopology) {
+        // unused methods.
+    }
+
+    @Override
+    public IetfNetwork getAugmentedIetfNetworkNetworks(IetfNetworkOpParam ietfNetwork) {
+        // unused methods.
+        return ietfNetwork;
+    }
+
+    @Override
+    public void setAugmentedIetfNetworkNetworks(IetfNetworkOpParam augmentedIetfNetworkNetworks) {
+        // unused methods.
+    }
+
+}