diff --git a/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/Constants.java b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/Constants.java
index fea0736..419e7eb 100644
--- a/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/Constants.java
+++ b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/Constants.java
@@ -69,6 +69,8 @@
     public static final int PRIORITY_GATEWAY_RULE = 30000;
     public static final int PRIORITY_SWITCHING_RULE = 30000;
     public static final int PRIORITY_CIDR_RULE = 30000;
+    public static final int PRIORITY_STATEFUL_SNAT_RULE = 41000;
+    public static final int PRIORITY_EXTERNAL_ROUTING_RULE = 25000;
     public static final int PRIORITY_ARP_GATEWAY_RULE = 41000;
     public static final int PRIORITY_ARP_SUBNET_RULE = 40000;
     public static final int PRIORITY_ARP_CONTROL_RULE = 40000;
@@ -98,4 +100,5 @@
     public static final int VTAP_OUTBOUND_MIRROR_TABLE = 72;
     public static final int FORWARDING_TABLE = 80;
     public static final int ERROR_TABLE = 100;
+    public static final int GW_COMMON_TABLE = 0;
 }
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sRoutingSnatHandler.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sRoutingSnatHandler.java
new file mode 100644
index 0000000..349043f
--- /dev/null
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sRoutingSnatHandler.java
@@ -0,0 +1,369 @@
+/*
+ * Copyright 2019-present Open Networking Foundation
+ *
+ * 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.k8snetworking.impl;
+
+import org.onlab.packet.ARP;
+import org.onlab.packet.Ethernet;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.IpPrefix;
+import org.onlab.packet.TpPort;
+import org.onosproject.cluster.ClusterService;
+import org.onosproject.cluster.LeadershipService;
+import org.onosproject.cluster.NodeId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.k8snetworking.api.K8sFlowRuleService;
+import org.onosproject.k8snetworking.api.K8sNetwork;
+import org.onosproject.k8snetworking.api.K8sNetworkEvent;
+import org.onosproject.k8snetworking.api.K8sNetworkListener;
+import org.onosproject.k8snetworking.api.K8sNetworkService;
+import org.onosproject.k8snetworking.api.K8sPort;
+import org.onosproject.k8snetworking.util.RulePopulatorUtil;
+import org.onosproject.k8snode.api.K8sNode;
+import org.onosproject.k8snode.api.K8sNodeEvent;
+import org.onosproject.k8snode.api.K8sNodeListener;
+import org.onosproject.k8snode.api.K8sNodeService;
+import org.onosproject.mastership.MastershipService;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.driver.DriverService;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
+import org.slf4j.Logger;
+
+import java.util.Objects;
+import java.util.concurrent.ExecutorService;
+
+import static java.util.concurrent.Executors.newSingleThreadExecutor;
+import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.k8snetworking.api.Constants.DEFAULT_GATEWAY_MAC;
+import static org.onosproject.k8snetworking.api.Constants.GW_COMMON_TABLE;
+import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID;
+import static org.onosproject.k8snetworking.api.Constants.PRIORITY_EXTERNAL_ROUTING_RULE;
+import static org.onosproject.k8snetworking.api.Constants.PRIORITY_STATEFUL_SNAT_RULE;
+import static org.onosproject.k8snetworking.api.Constants.ROUTING_TABLE;
+import static org.onosproject.k8snetworking.util.RulePopulatorUtil.CT_NAT_SRC_FLAG;
+import static org.onosproject.k8snetworking.util.RulePopulatorUtil.buildMoveArpShaToThaExtension;
+import static org.onosproject.k8snetworking.util.RulePopulatorUtil.buildMoveArpSpaToTpaExtension;
+import static org.onosproject.k8snetworking.util.RulePopulatorUtil.buildMoveEthSrcToDstExtension;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Provides POD's internal to external connectivity using source NAT (SNAT).
+ */
+@Component(immediate = true)
+public class K8sRoutingSnatHandler {
+
+    private final Logger log = getLogger(getClass());
+
+    private static final int POD_PREFIX = 32;
+
+    private static final int TP_PORT_MINIMUM_NUM = 1025;
+    private static final int TP_PORT_MAXIMUM_NUM = 65535;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected DeviceService deviceService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected DriverService driverService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected LeadershipService leadershipService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected MastershipService mastershipService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected ClusterService clusterService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected K8sNetworkService k8sNetworkService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected K8sNodeService k8sNodeService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected K8sFlowRuleService k8sFlowRuleService;
+
+    private final InternalK8sNetworkListener k8sNetworkListener =
+            new InternalK8sNetworkListener();
+    private final InternalK8sNodeListener k8sNodeListener =
+            new InternalK8sNodeListener();
+    private final ExecutorService eventExecutor = newSingleThreadExecutor(
+            groupedThreads(this.getClass().getSimpleName(), "event-handler", log));
+
+    private ApplicationId appId;
+    private NodeId localNodeId;
+
+    @Activate
+    protected void activate() {
+        appId = coreService.registerApplication(K8S_NETWORKING_APP_ID);
+
+        localNodeId = clusterService.getLocalNode().id();
+        leadershipService.runForLeadership(appId.name());
+        k8sNetworkService.addListener(k8sNetworkListener);
+        k8sNodeService.addListener(k8sNodeListener);
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        k8sNodeService.removeListener(k8sNodeListener);
+        k8sNetworkService.removeListener(k8sNetworkListener);
+        leadershipService.withdraw(appId.name());
+        eventExecutor.shutdown();
+
+        log.info("Stopped");
+    }
+
+    private void setContainerToExtRule(K8sNode k8sNode, boolean install) {
+
+        K8sNetwork net = k8sNetworkService.network(k8sNode.hostname());
+
+        if (net == null) {
+            return;
+        }
+
+        TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder()
+                .matchEthType(Ethernet.TYPE_IPV4)
+                .matchTunnelId(Long.valueOf(net.segmentId()))
+                .matchEthDst(DEFAULT_GATEWAY_MAC);
+
+        TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder()
+                .setOutput(k8sNode.intgToExtPatchPortNum());
+
+        k8sFlowRuleService.setRule(
+                appId,
+                k8sNode.intgBridge(),
+                sBuilder.build(),
+                tBuilder.build(),
+                PRIORITY_EXTERNAL_ROUTING_RULE,
+                ROUTING_TABLE,
+                install);
+    }
+
+    private void setExtToContainerRule(K8sNode k8sNode,
+                                       K8sPort k8sPort, boolean install) {
+
+        K8sNetwork net = k8sNetworkService.network(k8sPort.networkId());
+
+        if (net == null) {
+            return;
+        }
+
+        TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder()
+                .matchEthType(Ethernet.TYPE_IPV4)
+                .matchIPDst(IpPrefix.valueOf(k8sPort.ipAddress(), POD_PREFIX));
+
+        TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder()
+                .setOutput(k8sNode.extToIntgPatchPortNum());
+
+        k8sFlowRuleService.setRule(
+                appId,
+                k8sNode.extBridge(),
+                sBuilder.build(),
+                tBuilder.build(),
+                PRIORITY_STATEFUL_SNAT_RULE,
+                GW_COMMON_TABLE,
+                install);
+    }
+
+    private void setSnatDownstreamRule(K8sNode k8sNode,
+                                       boolean install) {
+        DeviceId deviceId = k8sNode.extBridge();
+
+        TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder();
+        sBuilder.matchEthType(Ethernet.TYPE_IPV4)
+                .matchIPDst(IpPrefix.valueOf(k8sNode.extBridgeIp(), POD_PREFIX));
+
+        ExtensionTreatment natTreatment = RulePopulatorUtil
+                .niciraConnTrackTreatmentBuilder(driverService, deviceId)
+                .commit(false)
+                .natAction(true)
+                .table((short) 0)
+                .build();
+
+        TrafficTreatment treatment = DefaultTrafficTreatment.builder()
+                .setEthSrc(DEFAULT_GATEWAY_MAC)
+                .extension(natTreatment, deviceId)
+                .build();
+
+        k8sFlowRuleService.setRule(
+                appId,
+                deviceId,
+                sBuilder.build(),
+                treatment,
+                PRIORITY_STATEFUL_SNAT_RULE,
+                GW_COMMON_TABLE,
+                install);
+    }
+
+    private void setSnatUpstreamRule(K8sNode k8sNode,
+                                     boolean install) {
+
+        K8sNetwork net = k8sNetworkService.network(k8sNode.hostname());
+
+        if (net == null) {
+            return;
+        }
+
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthType(Ethernet.TYPE_IPV4)
+                .matchEthDst(DEFAULT_GATEWAY_MAC)
+                .build();
+
+        TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder();
+
+        if (install) {
+            ExtensionTreatment natTreatment = RulePopulatorUtil
+                    .niciraConnTrackTreatmentBuilder(driverService, k8sNode.extBridge())
+                    .commit(true)
+                    .natFlag(CT_NAT_SRC_FLAG)
+                    .natAction(true)
+                    .natIp(k8sNode.extBridgeIp())
+                    .natPortMin(TpPort.tpPort(TP_PORT_MINIMUM_NUM))
+                    .natPortMax(TpPort.tpPort(TP_PORT_MAXIMUM_NUM))
+                    .build();
+
+            tBuilder.extension(natTreatment, k8sNode.extBridge())
+                    .setEthSrc(k8sNode.extBridgeMac())
+                    .setEthDst(k8sNode.extGatewayMac())
+                    .setOutput(k8sNode.extBridgePortNum());
+        }
+
+        k8sFlowRuleService.setRule(
+                appId,
+                k8sNode.extBridge(),
+                selector,
+                tBuilder.build(),
+                PRIORITY_STATEFUL_SNAT_RULE,
+                GW_COMMON_TABLE,
+                install);
+    }
+
+    private void setExtIntfArpRule(K8sNode k8sNode, boolean install) {
+
+        Device device = deviceService.getDevice(k8sNode.extBridge());
+
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthType(Ethernet.TYPE_ARP)
+                .matchArpOp(ARP.OP_REQUEST)
+                .matchArpTpa(Ip4Address.valueOf(k8sNode.extBridgeIp().toString()))
+                .build();
+
+        TrafficTreatment treatment = DefaultTrafficTreatment.builder()
+                .setArpOp(ARP.OP_REPLY)
+                .extension(buildMoveEthSrcToDstExtension(device), device.id())
+                .extension(buildMoveArpShaToThaExtension(device), device.id())
+                .extension(buildMoveArpSpaToTpaExtension(device), device.id())
+                .setArpSpa(Ip4Address.valueOf(k8sNode.extBridgeIp().toString()))
+                .setArpSha(k8sNode.extBridgeMac())
+                .setOutput(PortNumber.IN_PORT)
+                .build();
+
+        k8sFlowRuleService.setRule(
+                appId,
+                k8sNode.extBridge(),
+                selector,
+                treatment,
+                PRIORITY_STATEFUL_SNAT_RULE,
+                GW_COMMON_TABLE,
+                install);
+    }
+
+    private class InternalK8sNodeListener implements K8sNodeListener {
+
+        private boolean isRelevantHelper() {
+            return Objects.equals(localNodeId, leadershipService.getLeader(appId.name()));
+        }
+
+        @Override
+        public void event(K8sNodeEvent event) {
+            switch (event.type()) {
+                case K8S_NODE_COMPLETE:
+                    eventExecutor.execute(() -> processNodeCompletion(event.subject()));
+                    break;
+                case K8S_NODE_INCOMPLETE:
+                default:
+                    break;
+            }
+        }
+
+        private void processNodeCompletion(K8sNode k8sNode) {
+            if (!isRelevantHelper()) {
+                return;
+            }
+
+            setExtIntfArpRule(k8sNode, true);
+            setSnatUpstreamRule(k8sNode, true);
+            setSnatDownstreamRule(k8sNode, true);
+            setContainerToExtRule(k8sNode, true);
+        }
+    }
+
+    private class InternalK8sNetworkListener implements K8sNetworkListener {
+
+        private boolean isRelevantHelper() {
+            return Objects.equals(localNodeId, leadershipService.getLeader(appId.name()));
+        }
+
+        @Override
+        public void event(K8sNetworkEvent event) {
+            switch (event.type()) {
+                case K8S_PORT_ACTIVATED:
+                    eventExecutor.execute(() -> processPortActivation(event.port()));
+                    break;
+                case K8S_PORT_REMOVED:
+                    eventExecutor.execute(() -> processPortRemoval(event.port()));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        private void processPortActivation(K8sPort port) {
+            if (!isRelevantHelper()) {
+                return;
+            }
+
+            k8sNodeService.completeNodes().forEach(n ->
+                    setExtToContainerRule(n, port, true));
+        }
+
+        private void processPortRemoval(K8sPort port) {
+            if (!isRelevantHelper()) {
+                return;
+            }
+
+            k8sNodeService.completeNodes().forEach(n ->
+                    setExtToContainerRule(n, port, false));
+        }
+    }
+}
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sServiceHandler.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sServiceHandler.java
index 799ecb8..9c243f9 100644
--- a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sServiceHandler.java
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sServiceHandler.java
@@ -630,7 +630,9 @@
 
                     ports.forEach(p -> {
                         ExtensionTreatment ctNatTreatment = connTreatmentBuilder
-                                .natPort(TpPort.tpPort(p.getPort())).build();
+                                .natPortMin(TpPort.tpPort(p.getPort()))
+                                .natPortMax(TpPort.tpPort(p.getPort()))
+                                .build();
                         ExtensionTreatment resubmitTreatment = buildResubmitExtension(
                                 deviceService.getDevice(deviceId), ROUTING_TABLE);
                         TrafficTreatment treatment = DefaultTrafficTreatment.builder()
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingArpHandler.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingArpHandler.java
index 89680b0..79a2530 100644
--- a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingArpHandler.java
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingArpHandler.java
@@ -252,6 +252,10 @@
         }
 
         if (replyMac == null) {
+            replyMac = MacAddress.valueOf(gatewayMac);
+        }
+
+        if (replyMac == null) {
             log.debug("Failed to find MAC address for {}", targetIp);
             return;
         }
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingGatewayHandler.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingGatewayHandler.java
index 235897d..5ddc872 100644
--- a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingGatewayHandler.java
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingGatewayHandler.java
@@ -136,7 +136,7 @@
             TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder();
 
             if (node.hostname().equals(k8sNetwork.name())) {
-                tBuilder.setEthDst(node.intBridgeMac())
+                tBuilder.setEthDst(node.intgBridgeMac())
                         .setOutput(PortNumber.LOCAL);
             } else {
                 PortNumber portNum = tunnelPortNumByNetId(k8sNetwork.networkId(),
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingHandler.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingHandler.java
index 88cb589..04fd07c 100644
--- a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingHandler.java
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sSwitchingHandler.java
@@ -20,7 +20,9 @@
 import org.onlab.packet.IpPrefix;
 import org.onosproject.cfg.ComponentConfigService;
 import org.onosproject.cfg.ConfigProperty;
+import org.onosproject.cluster.ClusterService;
 import org.onosproject.cluster.LeadershipService;
+import org.onosproject.cluster.NodeId;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.CoreService;
 import org.onosproject.k8snetworking.api.K8sFlowRuleService;
@@ -30,6 +32,8 @@
 import org.onosproject.k8snetworking.api.K8sNetworkService;
 import org.onosproject.k8snetworking.api.K8sPort;
 import org.onosproject.k8snode.api.K8sNode;
+import org.onosproject.k8snode.api.K8sNodeEvent;
+import org.onosproject.k8snode.api.K8sNodeListener;
 import org.onosproject.k8snode.api.K8sNodeService;
 import org.onosproject.mastership.MastershipService;
 import org.onosproject.net.PortNumber;
@@ -46,6 +50,7 @@
 import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 
+import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.ExecutorService;
 
@@ -54,6 +59,7 @@
 import static org.onosproject.k8snetworking.api.Constants.ACL_EGRESS_TABLE;
 import static org.onosproject.k8snetworking.api.Constants.ARP_BROADCAST_MODE;
 import static org.onosproject.k8snetworking.api.Constants.ARP_TABLE;
+import static org.onosproject.k8snetworking.api.Constants.DEFAULT_GATEWAY_MAC;
 import static org.onosproject.k8snetworking.api.Constants.FORWARDING_TABLE;
 import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID;
 import static org.onosproject.k8snetworking.api.Constants.PRIORITY_SWITCHING_RULE;
@@ -85,6 +91,9 @@
     protected MastershipService mastershipService;
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
+    protected ClusterService clusterService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected DeviceService deviceService;
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
@@ -109,13 +118,19 @@
             groupedThreads(this.getClass().getSimpleName(), "event-handler"));
     private final InternalK8sNetworkListener k8sNetworkListener =
             new InternalK8sNetworkListener();
+    private final InternalK8sNodeListener k8sNodeListener =
+            new InternalK8sNodeListener();
 
     private ApplicationId appId;
+    private NodeId localNodeId;
 
     @Activate
     protected void activate() {
         appId = coreService.registerApplication(K8S_NETWORKING_APP_ID);
         k8sNetworkService.addListener(k8sNetworkListener);
+        localNodeId = clusterService.getLocalNode().id();
+        k8sNodeService.addListener(k8sNodeListener);
+        leadershipService.runForLeadership(appId.name());
 
         setGatewayRulesForTunnel(true);
 
@@ -124,6 +139,8 @@
 
     @Deactivate
     protected void deactivate() {
+        leadershipService.withdraw(appId.name());
+        k8sNodeService.removeListener(k8sNodeListener);
         k8sNetworkService.removeListener(k8sNetworkListener);
         eventExecutor.shutdown();
 
@@ -245,6 +262,51 @@
                 install);
     }
 
+    private void setExtToIntgTunnelTagFlowRules(K8sNode k8sNode, boolean install) {
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthType(Ethernet.TYPE_IPV4)
+                .matchEthSrc(DEFAULT_GATEWAY_MAC)
+                .matchInPort(k8sNode.intgToExtPatchPortNum())
+                .build();
+
+        K8sNetwork net = k8sNetworkService.network(k8sNode.hostname());
+
+        TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder()
+                .setTunnelId(Long.valueOf(net.segmentId()))
+                .transition(ACL_EGRESS_TABLE);
+
+        k8sFlowRuleService.setRule(
+                appId,
+                k8sNode.intgBridge(),
+                selector,
+                tBuilder.build(),
+                PRIORITY_TUNNEL_TAG_RULE,
+                VTAG_TABLE,
+                install);
+    }
+
+    private void setLocalTunnelTagFlowRules(K8sNode k8sNode, boolean install) {
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthType(Ethernet.TYPE_IPV4)
+                .matchInPort(PortNumber.LOCAL)
+                .build();
+
+        K8sNetwork net = k8sNetworkService.network(k8sNode.hostname());
+
+        TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder()
+                .setTunnelId(Long.valueOf(net.segmentId()))
+                .transition(ACL_EGRESS_TABLE);
+
+        k8sFlowRuleService.setRule(
+                appId,
+                k8sNode.intgBridge(),
+                selector,
+                tBuilder.build(),
+                PRIORITY_TUNNEL_TAG_RULE,
+                VTAG_TABLE,
+                install);
+    }
+
     private void setGatewayRulesForTunnel(boolean install) {
         k8sNetworkService.networks().forEach(n -> {
             // switching rules for the instPorts in the same node
@@ -355,4 +417,31 @@
             setNetworkRules(event.port(), false);
         }
     }
+
+    private class InternalK8sNodeListener implements K8sNodeListener {
+
+        private boolean isRelevantHelper() {
+            return Objects.equals(localNodeId, leadershipService.getLeader(appId.name()));
+        }
+
+        @Override
+        public void event(K8sNodeEvent event) {
+            switch (event.type()) {
+                case K8S_NODE_COMPLETE:
+                    eventExecutor.execute(() -> processNodeCompletion(event.subject()));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        private void processNodeCompletion(K8sNode k8sNode) {
+            if (!isRelevantHelper()) {
+                return;
+            }
+
+            setExtToIntgTunnelTagFlowRules(k8sNode, true);
+            setLocalTunnelTagFlowRules(k8sNode, true);
+        }
+    }
 }
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/RulePopulatorUtil.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/RulePopulatorUtil.java
index 25a44ea..a50d30c 100644
--- a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/RulePopulatorUtil.java
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/util/RulePopulatorUtil.java
@@ -42,6 +42,9 @@
 import static org.onosproject.k8snetworking.api.Constants.DST;
 import static org.onosproject.k8snetworking.api.Constants.SRC;
 import static org.onosproject.net.flow.instructions.ExtensionTreatmentType.ExtensionTreatmentTypes.NICIRA_LOAD;
+import static org.onosproject.net.flow.instructions.ExtensionTreatmentType.ExtensionTreatmentTypes.NICIRA_MOV_ARP_SHA_TO_THA;
+import static org.onosproject.net.flow.instructions.ExtensionTreatmentType.ExtensionTreatmentTypes.NICIRA_MOV_ARP_SPA_TO_TPA;
+import static org.onosproject.net.flow.instructions.ExtensionTreatmentType.ExtensionTreatmentTypes.NICIRA_MOV_ETH_SRC_TO_DST;
 import static org.onosproject.net.flow.instructions.ExtensionTreatmentType.ExtensionTreatmentTypes.NICIRA_RESUBMIT_TABLE;
 import static org.onosproject.net.flow.instructions.ExtensionTreatmentType.ExtensionTreatmentTypes.NICIRA_SET_TUNNEL_DST;
 import static org.slf4j.LoggerFactory.getLogger;
@@ -215,8 +218,8 @@
                                                     DeviceId deviceId,
                                                     Ip4Address remoteIp) {
         Device device = deviceService.getDevice(deviceId);
-        if (device != null && !device.is(ExtensionTreatmentResolver.class)) {
-            log.error("The extension treatment is not supported");
+
+        if (!checkTreatmentResolver(device)) {
             return null;
         }
 
@@ -271,8 +274,7 @@
      * @return resubmit extension treatment
      */
     public static ExtensionTreatment buildResubmitExtension(Device device, int tableId) {
-        if (device == null || !device.is(ExtensionTreatmentResolver.class)) {
-            log.warn("Nicira extension treatment is not supported");
+        if (!checkTreatmentResolver(device)) {
             return null;
         }
 
@@ -301,8 +303,7 @@
     public static ExtensionTreatment buildLoadExtension(Device device,
                                                         String ipType,
                                                         String shift) {
-        if (device == null || !device.is(ExtensionTreatmentResolver.class)) {
-            log.warn("Nicira extension treatment is not supported");
+        if (!checkTreatmentResolver(device)) {
             return null;
         }
 
@@ -335,6 +336,52 @@
         }
     }
 
+
+    /**
+     * Returns the nicira move source MAC to destination MAC extension treatment.
+     *
+     * @param device        device instance
+     * @return move extension treatment
+     */
+    public static ExtensionTreatment buildMoveEthSrcToDstExtension(Device device) {
+        if (!checkTreatmentResolver(device)) {
+            return null;
+        }
+
+        ExtensionTreatmentResolver resolver = device.as(ExtensionTreatmentResolver.class);
+        return resolver.getExtensionInstruction(NICIRA_MOV_ETH_SRC_TO_DST.type());
+    }
+
+    /**
+     * Returns the nicira move ARP SHA to THA extension treatment.
+     *
+     * @param device        device instance
+     * @return move extension treatment
+     */
+    public static ExtensionTreatment buildMoveArpShaToThaExtension(Device device) {
+        if (!checkTreatmentResolver(device)) {
+            return null;
+        }
+
+        ExtensionTreatmentResolver resolver = device.as(ExtensionTreatmentResolver.class);
+        return resolver.getExtensionInstruction(NICIRA_MOV_ARP_SHA_TO_THA.type());
+    }
+
+    /**
+     * Returns the nicira move ARP SPA to TPA extension treatment.
+     *
+     * @param device        device instance
+     * @return move extension treatment
+     */
+    public static ExtensionTreatment buildMoveArpSpaToTpaExtension(Device device) {
+        if (!checkTreatmentResolver(device)) {
+            return null;
+        }
+
+        ExtensionTreatmentResolver resolver = device.as(ExtensionTreatmentResolver.class);
+        return resolver.getExtensionInstruction(NICIRA_MOV_ARP_SPA_TO_TPA.type());
+    }
+
     /**
      * Calculate IP address upper string into integer.
      *
@@ -350,6 +397,15 @@
         return firstOctet << 8 | secondOctet;
     }
 
+    private static boolean checkTreatmentResolver(Device device) {
+        if (device == null || !device.is(ExtensionTreatmentResolver.class)) {
+            log.warn("Nicira extension treatment is not supported");
+            return false;
+        }
+
+        return true;
+    }
+
     /**
      * Builder class for OVS Connection Tracking feature actions.
      */
@@ -358,7 +414,8 @@
         private DriverService driverService;
         private DeviceId deviceId;
         private IpAddress natAddress = null;
-        private TpPort natPort = null;
+        private TpPort natPortMin = null;
+        private TpPort natPortMax = null;
         private int zone;
         private boolean commit;
         private short table = -1;
@@ -417,13 +474,24 @@
         }
 
         /**
-         * Sets port for NAT.
+         * Sets min port for NAT.
          *
          * @param port port number
          * @return NiciraConnTrackTreatmentBuilder object
          */
-        public NiciraConnTrackTreatmentBuilder natPort(TpPort port) {
-            this.natPort = port;
+        public NiciraConnTrackTreatmentBuilder natPortMin(TpPort port) {
+            this.natPortMin = port;
+            return this;
+        }
+
+        /**
+         * Sets max port for NAT.
+         *
+         * @param port port number
+         * @return NiciraConnTrackTreatmentBuilder object
+         */
+        public NiciraConnTrackTreatmentBuilder natPortMax(TpPort port) {
+            this.natPortMax = port;
             return this;
         }
 
@@ -468,19 +536,28 @@
                     ExtensionTreatmentType.ExtensionTreatmentTypes.NICIRA_NAT.type());
             try {
 
-                natTreatment.setPropertyValue(CT_FLAGS, this.natFlag);
+                if (natAddress == null && natPortMin == null && natPortMax == null) {
+                    natTreatment.setPropertyValue(CT_FLAGS, 0);
+                    natTreatment.setPropertyValue(CT_PRESENT_FLAGS, 0);
+                } else {
+                    natTreatment.setPropertyValue(CT_FLAGS, this.natFlag);
 
-                natTreatment.setPropertyValue(CT_PRESENT_FLAGS,
-                        buildPresentFlag(natPort != null, natAddress != null));
+                    natTreatment.setPropertyValue(CT_PRESENT_FLAGS,
+                            buildPresentFlag((natPortMin != null && natPortMax != null),
+                                    natAddress != null));
+                }
 
                 if (natAddress != null) {
                     natTreatment.setPropertyValue(CT_IPADDRESS_MIN, natAddress);
                     natTreatment.setPropertyValue(CT_IPADDRESS_MAX, natAddress);
                 }
 
-                if (natPort != null) {
-                    natTreatment.setPropertyValue(CT_PORT_MIN, natPort.toInt());
-                    natTreatment.setPropertyValue(CT_PORT_MAX, natPort.toInt());
+                if (natPortMin != null) {
+                    natTreatment.setPropertyValue(CT_PORT_MIN, natPortMin.toInt());
+                }
+
+                if (natPortMax != null) {
+                    natTreatment.setPropertyValue(CT_PORT_MAX, natPortMax.toInt());
                 }
 
             } catch (Exception e) {
diff --git a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/DefaultK8sNode.java b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/DefaultK8sNode.java
index e38d0a4..7be1e9a5 100644
--- a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/DefaultK8sNode.java
+++ b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/DefaultK8sNode.java
@@ -32,9 +32,12 @@
 import java.util.Objects;
 
 import static com.google.common.base.Preconditions.checkArgument;
+import static org.onosproject.k8snode.api.Constants.EXTERNAL_BRIDGE;
 import static org.onosproject.k8snode.api.Constants.GENEVE_TUNNEL;
 import static org.onosproject.k8snode.api.Constants.GRE_TUNNEL;
 import static org.onosproject.k8snode.api.Constants.INTEGRATION_BRIDGE;
+import static org.onosproject.k8snode.api.Constants.INTEGRATION_TO_EXTERNAL_BRIDGE;
+import static org.onosproject.k8snode.api.Constants.PHYSICAL_EXTERNAL_BRIDGE;
 import static org.onosproject.k8snode.api.Constants.VXLAN_TUNNEL;
 import static org.onosproject.net.AnnotationKeys.PORT_NAME;
 
@@ -44,7 +47,11 @@
 public class DefaultK8sNode implements K8sNode {
 
     private static final int DEFAULT_OVSDB_PORT = 6640;
+    private static final String IP_ADDRESS = "ip_address";
     private static final String MAC_ADDRESS = "mac_address";
+    private static final String EXT_INTF = "ext_interface";
+    private static final String EXT_GW_IP = "ext_gw_ip_address";
+    private static final String EXT_GW_MAC = "ext_gw_mac_address";
 
     private final String hostname;
     private final Type type;
@@ -175,7 +182,7 @@
     }
 
     @Override
-    public PortNumber intBridgePortNum() {
+    public PortNumber intgBridgePortNum() {
         DeviceService deviceService = DefaultServiceDirectory.getService(DeviceService.class);
         Port port = deviceService.getPorts(intgBridge).stream()
                 .filter(p -> p.isEnabled() &&
@@ -185,21 +192,99 @@
     }
 
     @Override
-    public MacAddress intBridgeMac() {
-        OvsdbController ovsdbController =
-                DefaultServiceDirectory.getService(OvsdbController.class);
-        OvsdbNodeId ovsdb = new OvsdbNodeId(this.managementIp, DEFAULT_OVSDB_PORT);
-        OvsdbClientService client = ovsdbController.getOvsdbClient(ovsdb);
+    public MacAddress intgBridgeMac() {
+        OvsdbClientService client = getOvsClient();
+
         if (client == null) {
             return null;
         }
 
-        Interface iface = client.getInterface(INTEGRATION_BRIDGE);
+        Interface iface = getOvsClient().getInterface(INTEGRATION_BRIDGE);
         OvsdbMap data = (OvsdbMap) iface.getExternalIdsColumn().data();
         return MacAddress.valueOf((String) data.map().get(MAC_ADDRESS));
     }
 
     @Override
+    public IpAddress extBridgeIp() {
+        OvsdbClientService client = getOvsClient();
+
+        if (client == null) {
+            return null;
+        }
+
+        Interface iface = getOvsClient().getInterface(EXTERNAL_BRIDGE);
+        OvsdbMap data = (OvsdbMap) iface.getExternalIdsColumn().data();
+        return IpAddress.valueOf((String) data.map().get(IP_ADDRESS));
+    }
+
+    @Override
+    public MacAddress extBridgeMac() {
+        OvsdbClientService client = getOvsClient();
+
+        if (client == null) {
+            return null;
+        }
+
+        Interface iface = getOvsClient().getInterface(EXTERNAL_BRIDGE);
+        OvsdbMap data = (OvsdbMap) iface.getExternalIdsColumn().data();
+        return MacAddress.valueOf((String) data.map().get(MAC_ADDRESS));
+    }
+
+    @Override
+    public IpAddress extGatewayIp() {
+        OvsdbClientService client = getOvsClient();
+
+        if (client == null) {
+            return null;
+        }
+
+        Interface iface = getOvsClient().getInterface(EXTERNAL_BRIDGE);
+        OvsdbMap data = (OvsdbMap) iface.getExternalIdsColumn().data();
+        return IpAddress.valueOf((String) data.map().get(EXT_GW_IP));
+    }
+
+    @Override
+    public MacAddress extGatewayMac() {
+        OvsdbClientService client = getOvsClient();
+
+        if (client == null) {
+            return null;
+        }
+
+        Interface iface = getOvsClient().getInterface(EXTERNAL_BRIDGE);
+        OvsdbMap data = (OvsdbMap) iface.getExternalIdsColumn().data();
+        return MacAddress.valueOf((String) data.map().get(EXT_GW_MAC));
+    }
+
+    @Override
+    public PortNumber intgToExtPatchPortNum() {
+        return portNumber(intgBridge, INTEGRATION_TO_EXTERNAL_BRIDGE);
+    }
+
+    @Override
+    public PortNumber extToIntgPatchPortNum() {
+        return portNumber(extBridge, PHYSICAL_EXTERNAL_BRIDGE);
+    }
+
+    @Override
+    public PortNumber extBridgePortNum() {
+        OvsdbClientService client = getOvsClient();
+
+        if (client == null) {
+            return null;
+        }
+
+        Interface iface = getOvsClient().getInterface(EXTERNAL_BRIDGE);
+        OvsdbMap data = (OvsdbMap) iface.getExternalIdsColumn().data();
+        String extIface = (String) data.map().get(EXT_INTF);
+        if (extIface == null) {
+            return null;
+        }
+
+        return portNumber(extBridge, extIface);
+    }
+
+    @Override
     public boolean equals(Object obj) {
         if (this == obj) {
             return true;
@@ -243,14 +328,31 @@
         if (dataIp == null) {
             return null;
         }
+
+        return portNumber(intgBridge, tunnelType);
+    }
+
+    private PortNumber portNumber(DeviceId deviceId, String portName) {
         DeviceService deviceService = DefaultServiceDirectory.getService(DeviceService.class);
-        Port port = deviceService.getPorts(intgBridge).stream()
+        Port port = deviceService.getPorts(deviceId).stream()
                 .filter(p -> p.isEnabled() &&
-                        Objects.equals(p.annotations().value(PORT_NAME), tunnelType))
+                        Objects.equals(p.annotations().value(PORT_NAME), portName))
                 .findAny().orElse(null);
         return port != null ? port.number() : null;
     }
 
+    private OvsdbClientService getOvsClient() {
+        OvsdbController ovsdbController =
+                DefaultServiceDirectory.getService(OvsdbController.class);
+        OvsdbNodeId ovsdb = new OvsdbNodeId(this.managementIp, DEFAULT_OVSDB_PORT);
+        OvsdbClientService client = ovsdbController.getOvsdbClient(ovsdb);
+        if (client == null) {
+            return null;
+        }
+
+        return client;
+    }
+
     /**
      * Returns new builder instance.
      *
diff --git a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java
index 6dfbead..30449ff 100644
--- a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java
+++ b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java
@@ -146,14 +146,63 @@
      *
      * @return host port number; null if the host port does not exist
      */
-    PortNumber intBridgePortNum();
+    PortNumber intgBridgePortNum();
 
     /**
      * Returns the integration bridge's MAC address.
      *
      * @return MAC address; null if the MAC address does not exist
      */
-    MacAddress intBridgeMac();
+    MacAddress intgBridgeMac();
+
+    /**
+     * Returns the external bridge's IP address.
+     *
+     * @return IP address; null if the IP address does not exist
+     */
+    IpAddress extBridgeIp();
+
+    /**
+     * Returns the external bridge's MAC address.
+     *
+     * @return MAC address; null if the MAC address does not exist
+     */
+    MacAddress extBridgeMac();
+
+    /**
+     * Returns the external gateway IP address.
+     *
+     * @return IP address; null if the IP address does not exist
+     */
+    IpAddress extGatewayIp();
+
+    /**
+     * Returns the external gateway MAC address.
+     *
+     * @return MAC address; null if the MAC address does not exist
+     */
+    MacAddress extGatewayMac();
+
+    /**
+     * Returns the integration to external patch port number.
+     *
+     * @return patch port number
+     */
+    PortNumber intgToExtPatchPortNum();
+
+    /**
+     * Returns the external to integration patch port number.
+     *
+     * @return patch port number
+     */
+    PortNumber extToIntgPatchPortNum();
+
+    /**
+     * Returns the external bridge to router port number.
+     *
+     * @return port number, null if the port does not exist
+     */
+    PortNumber extBridgePortNum();
 
     /**
      * Builder of new node entity.