diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/cli/virtualport/VirtualPortExGwUpdateCommand.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/cli/virtualport/VirtualPortExGwUpdateCommand.java
new file mode 100644
index 0000000..837d8c4
--- /dev/null
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/cli/virtualport/VirtualPortExGwUpdateCommand.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2015 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.vtnrsc.cli.virtualport;
+
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.karaf.shell.commands.Command;
+import org.apache.karaf.shell.commands.Option;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.vtnrsc.BindingHostId;
+import org.onosproject.vtnrsc.DefaultVirtualPort;
+import org.onosproject.vtnrsc.FixedIp;
+import org.onosproject.vtnrsc.Subnet;
+import org.onosproject.vtnrsc.TenantNetwork;
+import org.onosproject.vtnrsc.VirtualPort;
+import org.onosproject.vtnrsc.VirtualPortId;
+import org.onosproject.vtnrsc.subnet.SubnetService;
+import org.onosproject.vtnrsc.tenantnetwork.TenantNetworkService;
+import org.onosproject.vtnrsc.virtualport.VirtualPortService;
+
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+
+/**
+ * Supports for updating the external gateway virtualPort.
+ */
+@Command(scope = "onos", name = "externalgateway-update",
+        description = "Supports for updating the external gateway virtualPort.")
+public class VirtualPortExGwUpdateCommand extends AbstractShellCommand {
+
+    @Option(name = "-m", aliases = "--macAddress", description = "MAC address.", required = true,
+            multiValued = false)
+    String macAddress = "";
+
+    @Override
+    protected void execute() {
+        VirtualPortService service = get(VirtualPortService.class);
+        SubnetService subnetService = get(SubnetService.class);
+        TenantNetworkService tenantNetworkService = get(TenantNetworkService.class);
+        Iterable<TenantNetwork> networks = tenantNetworkService.getNetworks();
+        if (networks != null) {
+            for (TenantNetwork network : networks) {
+                if (network.routerExternal()) {
+                    Iterable<Subnet> subnets = subnetService.getSubnets();
+                    if (subnets != null) {
+                        for (Subnet subnet : subnets) {
+                            if (network.id().networkId().equals(subnet.networkId().networkId())) {
+                                IpAddress exgwip = subnet.gatewayIp();
+                                FixedIp fixedGwIp = FixedIp.fixedIp(subnet.id(), exgwip);
+                                VirtualPort exgwPort = service.getPort(fixedGwIp);
+                                if (exgwPort == null) {
+                                    createExGwPort(network, subnet, fixedGwIp);
+                                } else {
+                                    updateExGwPort(exgwPort);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private void createExGwPort(TenantNetwork network, Subnet subnet, FixedIp fixedGwIp) {
+        VirtualPortService service = get(VirtualPortService.class);
+        Map<String, String> strMap = Maps.newHashMap();
+        VirtualPort virtualPort = new DefaultVirtualPort(VirtualPortId.portId("externalgateway-update-id"),
+                                                         network.id(),
+                                                         false, strMap,
+                                                         VirtualPort.State.DOWN,
+                                                         MacAddress.valueOf(macAddress),
+                                                         subnet.tenantId(),
+                                                         null,
+                                                         Sets.newHashSet(fixedGwIp),
+                                                         BindingHostId.bindingHostId(""),
+                                                         Sets.newHashSet(),
+                                                         Sets.newHashSet());
+        Set<VirtualPort> virtualPorts = Sets.newHashSet(virtualPort);
+        service.createPorts(virtualPorts);
+    }
+
+    private void updateExGwPort(VirtualPort exgwPort) {
+        VirtualPortService service = get(VirtualPortService.class);
+        Map<String, String> strMap = Maps.newHashMap();
+        strMap.putIfAbsent("name", exgwPort.name());
+        strMap.putIfAbsent("deviceOwner", exgwPort.deviceOwner());
+        strMap.putIfAbsent("bindingvnicType", exgwPort.bindingVnicType());
+        strMap.putIfAbsent("bindingvifType", exgwPort.bindingVifType());
+        strMap.putIfAbsent("bindingvnicDetails", exgwPort.bindingVifDetails());
+        VirtualPort virtualPort = new DefaultVirtualPort(exgwPort.portId(),
+                                                         exgwPort.networkId(),
+                                                         false, strMap,
+                                                         VirtualPort.State.DOWN,
+                                                         MacAddress.valueOf(macAddress),
+                                                         exgwPort.tenantId(),
+                                                         exgwPort.deviceId(),
+                                                         exgwPort.fixedIps(),
+                                                         exgwPort.bindingHostId(),
+                                                         Sets.newHashSet(exgwPort
+                                                                .allowedAddressPairs()),
+                                                         Sets.newHashSet(exgwPort
+                                                                .securityGroups()));
+        Set<VirtualPort> virtualPorts = Sets.newHashSet(virtualPort);
+        service.updatePorts(virtualPorts);
+    }
+}
diff --git a/apps/vtn/vtnrsc/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/apps/vtn/vtnrsc/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index f7a1bf4..75e8ff1 100644
--- a/apps/vtn/vtnrsc/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/apps/vtn/vtnrsc/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -52,6 +52,9 @@
      <command>
       <action class="org.onosproject.vtnrsc.cli.virtualport.VirtualPortUpdateCommand"/>
     </command>
+    <command>
+      <action class="org.onosproject.vtnrsc.cli.virtualport.VirtualPortExGwUpdateCommand"/>
+    </command>
      <command>
       <action class="org.onosproject.vtnrsc.cli.floatingip.FloatingIpCreateCommand"/>
     </command>