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diff --git a/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpDesignatedDpnListener.java b/dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpDesignatedDpnListener.java
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+/*
+ * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.vpnservice.dhcpservice;
+
+import java.math.BigInteger;
+import java.util.List;
+
+import org.opendaylight.controller.md.sal.binding.api.ClusteredDataChangeListener;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
+import org.opendaylight.vpnservice.datastoreutils.AsyncClusteredDataChangeListenerBase;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.dhcp.rev160428.DesignatedSwitchesForExternalTunnels;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.dhcp.rev160428.designated.switches._for.external.tunnels.DesignatedSwitchForTunnel;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class DhcpDesignatedDpnListener extends AsyncClusteredDataChangeListenerBase<DesignatedSwitchForTunnel, DhcpDesignatedDpnListener> implements AutoCloseable {
+
+    private static final Logger LOG = LoggerFactory.getLogger(DhcpDesignatedDpnListener.class);
+    private ListenerRegistration<DataChangeListener> listenerRegistration;
+    private DhcpExternalTunnelManager dhcpExternalTunnelManager;
+    private DataBroker broker;
+
+    public DhcpDesignatedDpnListener(final DhcpExternalTunnelManager dhcpExternalTunnelManager, final DataBroker broker) {
+        super(DesignatedSwitchForTunnel.class, DhcpDesignatedDpnListener.class);
+        this.dhcpExternalTunnelManager = dhcpExternalTunnelManager;
+        this.broker = broker;
+    }
+
+    @Override
+    public void close() throws Exception {
+        if (listenerRegistration != null) {
+            try {
+                listenerRegistration.close();
+            } catch (final Exception e) {
+                LOG.error("Error when cleaning up DhcpDesignatedDpnListener.", e);
+            }
+            listenerRegistration = null;
+        }
+        LOG.debug("DhcpDesignatedDpnListener Listener Closed");
+    }
+
+    @Override
+    protected void remove(InstanceIdentifier<DesignatedSwitchForTunnel> identifier, DesignatedSwitchForTunnel del) {
+        dhcpExternalTunnelManager.removeFromLocalCache(BigInteger.valueOf(del.getDpId()), del.getTunnelRemoteIpAddress(), del.getElanInstanceName());
+        dhcpExternalTunnelManager.unInstallDhcpFlowsForVms(del.getElanInstanceName(), del.getTunnelRemoteIpAddress(), DhcpServiceUtils.getListOfDpns(broker));
+    }
+
+    @Override
+    protected void update(InstanceIdentifier<DesignatedSwitchForTunnel> identifier, DesignatedSwitchForTunnel original,
+            DesignatedSwitchForTunnel update) {
+        BigInteger designatedDpnId = BigInteger.valueOf(update.getDpId());
+        IpAddress tunnelRemoteIpAddress = update.getTunnelRemoteIpAddress();
+        String elanInstanceName = update.getElanInstanceName();
+        dhcpExternalTunnelManager.removeFromLocalCache(BigInteger.valueOf(original.getDpId()), original.getTunnelRemoteIpAddress(), original.getElanInstanceName());
+        dhcpExternalTunnelManager.updateLocalCache(designatedDpnId, tunnelRemoteIpAddress, elanInstanceName);
+/*        List<BigInteger> elanDpns = DhcpServiceUtils.getDpnsForElan(elanInstanceName, broker);
+        if (elanDpns == null || elanDpns.isEmpty()) {
+            dhcpExternalTunnelManager.installRemoteMcastMac(designatedDpnId, tunnelRemoteIpAddress, elanInstanceName);
+        }*/
+    }
+
+    @Override
+    protected void add(InstanceIdentifier<DesignatedSwitchForTunnel> identifier, DesignatedSwitchForTunnel add) {
+        BigInteger designatedDpnId = BigInteger.valueOf(add.getDpId());
+        IpAddress tunnelRemoteIpAddress = add.getTunnelRemoteIpAddress();
+        String elanInstanceName = add.getElanInstanceName();
+        dhcpExternalTunnelManager.updateLocalCache(designatedDpnId, tunnelRemoteIpAddress, elanInstanceName);
+/*        List<BigInteger> elanDpns = DhcpServiceUtils.getDpnsForElan(elanInstanceName, broker);
+        if (elanDpns == null || elanDpns.isEmpty()) {
+            dhcpExternalTunnelManager.installRemoteMcastMac(designatedDpnId, tunnelRemoteIpAddress, elanInstanceName);
+        }*/
+    }
+
+    @Override
+    protected InstanceIdentifier<DesignatedSwitchForTunnel> getWildCardPath() {
+        return InstanceIdentifier.create(DesignatedSwitchesForExternalTunnels.class).child(DesignatedSwitchForTunnel.class);
+    }
+
+    @Override
+    protected ClusteredDataChangeListener getDataChangeListener() {
+        return DhcpDesignatedDpnListener.this;
+    }
+
+    @Override
+    protected DataChangeScope getDataChangeScope() {
+        return AsyncDataBroker.DataChangeScope.SUBTREE;
+    }
+}