diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/OpenstackInterfaceManager.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/OpenstackInterfaceManager.java
new file mode 100644
index 0000000..9b99b81
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/OpenstackInterfaceManager.java
@@ -0,0 +1,409 @@
+/*
+ * 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.openstackinterface;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.sun.jersey.api.client.Client;
+import com.sun.jersey.api.client.WebResource;
+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.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.net.Port;
+import org.onosproject.net.config.ConfigFactory;
+import org.onosproject.net.config.NetworkConfigEvent;
+import org.onosproject.net.config.NetworkConfigListener;
+import org.onosproject.net.config.NetworkConfigRegistry;
+import org.onosproject.openstackinterface.web.OpenstackNetworkCodec;
+import org.onosproject.openstackinterface.web.OpenstackPortCodec;
+import org.onosproject.openstackinterface.web.OpenstackRouterCodec;
+import org.onosproject.openstackinterface.web.OpenstackSecurityGroupCodec;
+import org.onosproject.openstackinterface.web.OpenstackSubnetCodec;
+import org.slf4j.Logger;
+import javax.ws.rs.core.MediaType;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.stream.Collectors;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.net.MediaType.JSON_UTF_8;
+import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.net.config.basics.SubjectFactories.APP_SUBJECT_FACTORY;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Handles REST Calls to Openstack Neutron.
+ *
+ */
+@Service
+@Component(immediate = true)
+public class OpenstackInterfaceManager implements OpenstackInterfaceService {
+
+    private static final String URI_NETWORKS = "networks";
+    private static final String URI_PORTS = "ports";
+    private static final String URI_SUBNETS = "subnets";
+    private static final String URI_SECURITY_GROUPS = "security-groups";
+    private static final String URI_TOKENS = "tokens";
+
+    private static final String PATH_ROUTERS = "routers";
+    private static final String PATH_NETWORKS = "networks";
+    private static final String PATH_PORTS = "ports";
+    private static final String PATH_SUBNETS = "subnets";
+    private static final String PATH_ACCESS = "access";
+    private static final String PATH_TOKEN = "token";
+    private static final String PATH_ID = "id";
+
+    private static final String HEADER_AUTH_TOKEN = "X-Auth-Token";
+
+    private final Logger log = getLogger(getClass());
+    private String neutronUrl;
+    private String keystoneUrl;
+    private String tokenId;
+    private String userName;
+    private String pass;
+
+    private static final String PORT_NAME = "portName";
+
+    private ApplicationId appId;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected NetworkConfigRegistry cfgService;
+
+    private InternalConfigListener internalConfigListener = new InternalConfigListener();
+    private ExecutorService networkEventExcutorService =
+            Executors.newSingleThreadExecutor(groupedThreads("onos/openstackinterface", "config-event"));
+
+    private final Set<ConfigFactory> factories = ImmutableSet.of(
+            new ConfigFactory<ApplicationId, OpenstackNetworkingConfig>(APP_SUBJECT_FACTORY,
+                    OpenstackNetworkingConfig.class,
+                    "openstackinterface") {
+                @Override
+                public OpenstackNetworkingConfig createConfig() {
+                    return new OpenstackNetworkingConfig();
+                }
+            }
+    );
+
+
+    @Activate
+    protected void activate() {
+        appId = coreService
+                .registerApplication("org.onosproject.openstackinterface");
+
+        factories.forEach(cfgService::registerConfigFactory);
+        cfgService.addListener(internalConfigListener);
+
+        log.info("started");
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        cfgService.removeListener(internalConfigListener);
+        factories.forEach(cfgService::unregisterConfigFactory);
+        log.info("stopped");
+    }
+
+    /**
+     * Returns network information stored in Neutron.
+     *
+     * @return List of OpenstackNetwork
+     */
+    public Collection<OpenstackNetwork> getNetworks() {
+
+        WebResource.Builder builder = getClientBuilder(neutronUrl + URI_NETWORKS);
+        String response = builder.accept(MediaType.APPLICATION_JSON_TYPE).
+                header(HEADER_AUTH_TOKEN, getToken()).get(String.class);
+
+        log.debug("networks response:" + response);
+
+        ObjectMapper mapper = new ObjectMapper();
+        List<OpenstackNetwork> openstackNetworks = Lists.newArrayList();
+        try {
+            ObjectNode node = (ObjectNode) mapper.readTree(response);
+            ArrayNode networkList = (ArrayNode) node.path(PATH_NETWORKS);
+            OpenstackNetworkCodec networkCodec = new OpenstackNetworkCodec();
+            networkList.forEach(n -> openstackNetworks.add(networkCodec.decode((ObjectNode) n, null)));
+        } catch (IOException e) {
+            log.warn("getNetworks()", e);
+        }
+
+        openstackNetworks.removeAll(Collections.singleton(null));
+        openstackNetworks.forEach(n -> log.debug("network ID: {}", n.id()));
+
+        return openstackNetworks;
+    }
+
+    /**
+     * Returns port information stored in Neutron.
+     *
+     * @return List of OpenstackPort
+     */
+    public Collection<OpenstackPort> getPorts() {
+
+        WebResource.Builder builder = getClientBuilder(neutronUrl + URI_PORTS);
+        String response = builder.accept(MediaType.APPLICATION_JSON_TYPE).
+                header(HEADER_AUTH_TOKEN, getToken()).get(String.class);
+
+        ObjectMapper mapper = new ObjectMapper();
+        List<OpenstackPort> openstackPorts = Lists.newArrayList();
+        try {
+            ObjectNode node = (ObjectNode) mapper.readTree(response);
+            ArrayNode portList = (ArrayNode) node.path(PATH_PORTS);
+            OpenstackPortCodec portCodec = new OpenstackPortCodec();
+            portList.forEach(p -> openstackPorts.add(portCodec.decode((ObjectNode) p, null)));
+        } catch (IOException e) {
+            log.warn("getPorts()", e);
+        }
+
+        log.debug("port response:" + response);
+        openstackPorts.forEach(n -> log.debug("port ID: {}", n.id()));
+
+        return openstackPorts;
+    }
+
+    public Collection<OpenstackRouter> getRouters() {
+        WebResource.Builder builder = getClientBuilder(neutronUrl + PATH_ROUTERS);
+        String response = builder.accept(MediaType.APPLICATION_JSON_TYPE).
+                header(HEADER_AUTH_TOKEN, getToken()).get(String.class);
+
+        ObjectMapper mapper = new ObjectMapper();
+        List<OpenstackRouter> openstackRouters = Lists.newArrayList();
+
+        try {
+            ObjectNode node = (ObjectNode) mapper.readTree(response);
+            ArrayNode routerList = (ArrayNode) node.path(PATH_ROUTERS);
+            OpenstackRouterCodec openstackRouterCodec = new OpenstackRouterCodec();
+            routerList.forEach(r -> openstackRouters
+                    .add(openstackRouterCodec.decode((ObjectNode) r, null)));
+        } catch (IOException e) {
+            log.warn("getRouters()", e);
+        }
+
+        log.debug("router response:" + response);
+        openstackRouters.forEach(r -> log.debug("router ID: {}", r.id()));
+
+        return openstackRouters;
+    }
+
+    /**
+     * Returns Subnet information in Neutron.
+     *
+     * @return List of OpenstackSubnet
+     */
+    public Collection<OpenstackSubnet> getSubnets() {
+
+        WebResource.Builder builder = getClientBuilder(neutronUrl + URI_SUBNETS);
+        String response = builder.accept(MediaType.APPLICATION_JSON_TYPE).
+                header(HEADER_AUTH_TOKEN, getToken()).get(String.class);
+
+        ObjectMapper mapper = new ObjectMapper();
+        List<OpenstackSubnet> subnets = Lists.newArrayList();
+        try {
+            ObjectNode node = (ObjectNode) mapper.readTree(response);
+            ArrayNode subnetList = (ArrayNode) node.path(PATH_SUBNETS);
+            OpenstackSubnetCodec subnetCodec = new OpenstackSubnetCodec();
+            subnetList.forEach(s -> subnets.add(subnetCodec.decode((ObjectNode) s, null)));
+        } catch (IOException e) {
+            log.warn("getSubnets()", e);
+        }
+
+        log.debug("subnets response:" + response);
+        subnets.forEach(s -> log.debug("subnet ID: {}", s.id()));
+
+        return subnets;
+    }
+
+    /**
+     * Extracts OpenstackSecurityGroup information for the ID.
+     *
+     * @param id Security Group ID
+     * @return OpenstackSecurityGroup object or null if fails
+     */
+    public OpenstackSecurityGroup getSecurityGroup(String id) {
+        WebResource.Builder builder = getClientBuilder(neutronUrl + URI_SECURITY_GROUPS + "/" + id);
+        String response = builder.accept(MediaType.APPLICATION_JSON_TYPE).
+                header(HEADER_AUTH_TOKEN, getToken()).get(String.class);
+
+        ObjectMapper mapper = new ObjectMapper();
+        OpenstackSecurityGroup securityGroup = null;
+        try {
+            ObjectNode node = (ObjectNode) mapper.readTree(response);
+            OpenstackSecurityGroupCodec sgCodec = new OpenstackSecurityGroupCodec();
+            securityGroup = sgCodec.decode(node, null);
+        } catch (IOException e) {
+            log.warn("getSecurityGroup()", e);
+        }
+
+        return securityGroup;
+    }
+
+    private WebResource.Builder getClientBuilder(String uri) {
+        Client client = Client.create();
+        WebResource resource = client.resource(uri);
+        return resource.accept(JSON_UTF_8.toString())
+                .type(JSON_UTF_8.toString());
+    }
+
+    private String getToken() {
+        if (isTokenInvalid()) {
+            String request = "{\"auth\": {\"tenantName\": \"admin\", " +
+                    "\"passwordCredentials\":  {\"username\": \"" +
+                    userName + "\",\"password\": \"" + pass + "\"}}}";
+            WebResource.Builder builder = getClientBuilder(keystoneUrl + URI_TOKENS);
+            String response = builder.accept(MediaType.APPLICATION_JSON).post(String.class, request);
+
+            ObjectMapper mapper = new ObjectMapper();
+            try {
+                ObjectNode node = (ObjectNode) mapper.readTree(response);
+                tokenId = node.path(PATH_ACCESS).path(PATH_TOKEN).path(PATH_ID).asText();
+            } catch (IOException e) {
+                log.warn("getToken()", e);
+            }
+            log.debug("token response:" + response);
+        }
+
+        return tokenId;
+    }
+
+    private boolean isTokenInvalid() {
+        //TODO: validation check for the existing token
+        return true;
+    }
+
+    @Override
+    public Collection<OpenstackPort> ports(String networkId) {
+        return getPorts().stream()
+                .filter(port -> port.networkId().equals(networkId))
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    public Collection<OpenstackPort> ports() {
+        return getPorts();
+    }
+
+    @Override
+    public OpenstackPort port(Port port) {
+        String uuid = port.annotations().value(PORT_NAME).substring(3);
+        return getPorts().stream()
+                .filter(p -> p.id().startsWith(uuid))
+                .findAny().orElse(null);
+    }
+
+    @Override
+    public OpenstackPort port(String portId) {
+        return getPorts().stream()
+                .filter(p -> p.id().equals(portId))
+                .findAny().orElse(null);
+    }
+
+    @Override
+    public OpenstackNetwork network(String networkId) {
+        Collection<OpenstackSubnet> subnets = getSubnets().stream()
+                .filter(s -> s.networkId().equals(networkId))
+                .collect(Collectors.toList());
+
+        OpenstackNetwork openstackNetwork = getNetworks().stream()
+                .filter(n -> n.id().equals(networkId))
+                .findAny().orElse(null);
+
+        if (openstackNetwork == null) {
+            return null;
+        }
+
+        return OpenstackNetwork.builder()
+                .id(openstackNetwork.id())
+                .name(openstackNetwork.name())
+                .networkType(openstackNetwork.networkType())
+                .segmentId(openstackNetwork.segmentId())
+                .tenantId(openstackNetwork.tenantId())
+                .subnets(subnets)
+                .build();
+    }
+
+    @Override
+    public Collection<OpenstackNetwork> networks() {
+        return getNetworks();
+    }
+
+    @Override
+    public OpenstackSubnet subnet(String subnetId) {
+        return getSubnets().stream()
+                .filter(subnet -> subnet.id().equals(subnetId))
+                .findAny().orElse(null);
+    }
+
+    @Override
+    public Collection<OpenstackSubnet> subnets() {
+        return getSubnets();
+    }
+
+    @Override
+    public Collection<OpenstackRouter> routers() {
+        return getRouters();
+    }
+
+    @Override
+    public OpenstackRouter router(String routerId) {
+        return getRouters().stream()
+                .filter(router -> router.id().equals(routerId))
+                .findAny().orElse(null);
+    }
+
+    private class InternalConfigListener implements NetworkConfigListener {
+
+        public void configureNetwork() {
+            OpenstackNetworkingConfig cfg =
+                    cfgService.getConfig(appId, OpenstackNetworkingConfig.class);
+            if (cfg == null) {
+                log.error("There is no openstack server information in config.");
+                return;
+            }
+
+            neutronUrl = checkNotNull(cfg.neutronServer());
+            keystoneUrl = checkNotNull(cfg.keystoneServer());
+            userName = checkNotNull(cfg.userName());
+            pass = checkNotNull(cfg.password());
+        }
+
+        @Override
+        public void event(NetworkConfigEvent event) {
+            if (((event.type() == NetworkConfigEvent.Type.CONFIG_ADDED ||
+                    event.type() == NetworkConfigEvent.Type.CONFIG_UPDATED)) &&
+                    event.configClass().equals(OpenstackNetworkingConfig.class)) {
+
+                log.info("Network configuration changed");
+                networkEventExcutorService.execute(this::configureNetwork);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/package-info.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/package-info.java
new file mode 100644
index 0000000..0507571
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * 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.
+ */
+
+/**
+ * Application for OpenstackRouting.
+ */
+package org.onosproject.openstackinterface;
\ No newline at end of file
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackNetworkCodec.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackNetworkCodec.java
new file mode 100644
index 0000000..18c73a6
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackNetworkCodec.java
@@ -0,0 +1,76 @@
+/*
+ * 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.openstackinterface.web;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.openstackinterface.OpenstackNetwork;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Implementation of the OpenstackNetwork Codec.
+ *
+ */
+public class OpenstackNetworkCodec extends JsonCodec<OpenstackNetwork> {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    private static final String NETWORK = "network";
+    private static final String NAME = "name";
+    private static final String TENANT_ID = "tenant_id";
+    private static final String SEGMENTATION_ID = "provider:segmentation_id";
+    private static final String NETWORK_TYPE = "provider:network_type";
+    private static final String ID = "id";
+
+    @Override
+    public OpenstackNetwork decode(ObjectNode json, CodecContext context) {
+
+        JsonNode networkInfo = json.get(NETWORK);
+        if (networkInfo == null) {
+            networkInfo = json;
+        }
+
+        String name = networkInfo.path(NAME).asText();
+        String tenantId = networkInfo.path(TENANT_ID).asText();
+        String id = networkInfo.path(ID).asText();
+
+        OpenstackNetwork.Builder onb = OpenstackNetwork.builder();
+        onb.name(name)
+                .tenantId(tenantId)
+                .id(id);
+
+        if (networkInfo.path(NETWORK_TYPE).isMissingNode()) {
+            log.debug("Network {} has no network type, ignore it.", name);
+            return null;
+        }
+
+        String networkType = networkInfo.path(NETWORK_TYPE).asText();
+        try {
+            onb.networkType(OpenstackNetwork.NetworkType.valueOf(networkType.toUpperCase()));
+        } catch (IllegalArgumentException e) {
+            log.debug("Network {} has unsupported network type {}, ignore it.",
+                     name, networkType);
+            return null;
+        }
+
+        onb.segmentId(networkInfo.path(SEGMENTATION_ID).asText());
+
+        return onb.build();
+    }
+}
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackPortCodec.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackPortCodec.java
new file mode 100644
index 0000000..1c107ac
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackPortCodec.java
@@ -0,0 +1,131 @@
+/*
+ * 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.openstackinterface.web;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.openstackinterface.OpenstackPort;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Encodes and decodes the OpenstackPort.
+ */
+public class OpenstackPortCodec extends JsonCodec<OpenstackPort> {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    // JSON field names
+    private static final String PORT = "port";
+    private static final String STATUS = "status";
+    private static final String NAME = "name";
+    private static final String ADDRESS_PAIR = "allowed_address_pairs";
+    private static final String ADMIN_STATUS = "admin_status";
+    private static final String NETWORK_ID = "network_id";
+    private static final String TENANT_ID = "tenant_id";
+    private static final String DEVICE_OWNER = "device_owner";
+    private static final String MAC_ADDRESS = "mac_address";
+    private static final String FIXED_IPS = "fixed_ips";
+    private static final String SUBNET_ID = "subnet_id";
+    private static final String IP_ADDRESS = "ip_address";
+    private static final String ID = "id";
+    private static final String SECURITY_GROUPS = "security_groups";
+    private static final String DEVICE_ID = "device_id";
+    private static final String NA = "N/A";
+
+    @Override
+    public OpenstackPort decode(ObjectNode json, CodecContext context) {
+
+        checkNotNull(json);
+        HashMap<String, Ip4Address> fixedIpMap = new HashMap<>();
+        JsonNode portInfo = json.get(PORT);
+        if (portInfo == null) {
+            portInfo = json;
+        }
+
+        String status = portInfo.path(STATUS).asText();
+        String name = portInfo.path(NAME).asText();
+        boolean adminStateUp = portInfo.path(ADMIN_STATUS).asBoolean();
+        String networkId = portInfo.path(NETWORK_ID).asText();
+        String tenantId = portInfo.path(TENANT_ID).asText();
+        String deviceOwner = portInfo.path(DEVICE_OWNER).asText();
+        String macStr = portInfo.path(MAC_ADDRESS).asText();
+        ArrayNode fixedIpList = (ArrayNode) portInfo.path(FIXED_IPS);
+        for (JsonNode fixedIpInfo: fixedIpList) {
+            String subnetId = fixedIpInfo.path(SUBNET_ID).asText();
+            String ipAddressStr = fixedIpInfo.path(IP_ADDRESS).asText();
+            if (!fixedIpInfo.path(IP_ADDRESS).isMissingNode() && ipAddressStr != null) {
+                Ip4Address ipAddress = Ip4Address.valueOf(ipAddressStr);
+                fixedIpMap.put(subnetId, ipAddress);
+            }
+        }
+        String id = portInfo.path(ID).asText();
+        ArrayNode securityGroupList = (ArrayNode) portInfo.path(SECURITY_GROUPS);
+        Collection<String> securityGroupIdList = Lists.newArrayList();
+        securityGroupList.forEach(securityGroup -> securityGroupIdList.add(securityGroup.asText()));
+        String deviceId = portInfo.path(DEVICE_ID).asText();
+
+        Map<IpAddress, MacAddress> addressPairs = Maps.newHashMap();
+        for (JsonNode addrPair : (ArrayNode) portInfo.path(ADDRESS_PAIR)) {
+            try {
+                addressPairs.put(IpAddress.valueOf(addrPair.path(IP_ADDRESS).asText()),
+                                 MacAddress.valueOf(addrPair.path(MAC_ADDRESS).asText()));
+            } catch (IllegalArgumentException e) {
+                log.debug("Invalid address pair {}", addrPair.toString());
+            }
+        }
+
+        OpenstackPort.Builder openstackPortBuilder = OpenstackPort.builder();
+        OpenstackPort.PortStatus portStatus =
+                status.equals(NA) ? OpenstackPort.PortStatus.NA :
+                        OpenstackPort.PortStatus.valueOf(status);
+
+        openstackPortBuilder.portStatus(portStatus)
+                .name(name)
+                .adminState(adminStateUp)
+                .netwrokId(networkId)
+                .tenantId(tenantId)
+                .deviceOwner(deviceOwner)
+                .macAddress(MacAddress.valueOf(macStr))
+                .fixedIps(fixedIpMap)
+                .id(id)
+                .deviceId(deviceId)
+                .securityGroup(securityGroupIdList);
+
+        if (!addressPairs.isEmpty()) {
+            openstackPortBuilder.allowedAddressPairs(addressPairs);
+        }
+
+        OpenstackPort openstackPort = openstackPortBuilder.build();
+
+        return openstackPort;
+    }
+
+}
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackRouterCodec.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackRouterCodec.java
new file mode 100644
index 0000000..6a1750e
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackRouterCodec.java
@@ -0,0 +1,107 @@
+/*
+ * 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.openstackinterface.web;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.Maps;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.openstackinterface.OpenstackExternalGateway;
+import org.onosproject.openstackinterface.OpenstackRouter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.Map;
+/**
+ * Implementation of the OpenstackRouter Codec.
+ */
+public class OpenstackRouterCodec extends JsonCodec<OpenstackRouter> {
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    private static final String ROUTER = "router";
+    private static final String TENANT_ID = "tenant_id";
+    private static final String NETWORK_ID = "network_id";
+    private static final String ID = "id";
+    private static final String NAME = "name";
+    private static final String STATUS = "status";
+    private static final String ADMIN_STATE_UP = "admin_state_up";
+    private static final String EXTERNAL_GW_INFO = "external_gateway_info";
+    private static final String EXTERNAL_FIXED_IPS = "external_fixed_ips";
+    private static final String SUBNET_ID = "subnet_id";
+    private static final String IP_ADDRESS = "ip_address";
+
+    /**
+     * Decodes the OpenstackRouter.
+     *
+     * @param json    JSON to decode
+     * @param context decoding context
+     * @return OpenstackRouter
+     */
+    @Override
+    public OpenstackRouter decode(ObjectNode json, CodecContext context) {
+
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+        JsonNode routerInfo = json.get(ROUTER);
+        if (routerInfo == null) {
+            routerInfo = json;
+        }
+
+        String tenantId = checkNotNull(routerInfo.path(TENANT_ID).asText());
+        String id = checkNotNull(routerInfo.path(ID).asText());
+        String name = checkNotNull(routerInfo.path(NAME).asText());
+        String status = checkNotNull(routerInfo.path(STATUS).asText());
+        String adminStateUp = checkNotNull(routerInfo.path(ADMIN_STATE_UP).asText());
+
+        OpenstackExternalGateway.Builder osExtBuiler = new OpenstackExternalGateway.Builder();
+
+        if (!routerInfo.path(EXTERNAL_GW_INFO).isMissingNode()) {
+            String externalGatewayNetId = checkNotNull(routerInfo.path(EXTERNAL_GW_INFO).path(NETWORK_ID).asText());
+            Map<String, Ip4Address> fixedIpMap = Maps.newHashMap();
+
+
+            if (!routerInfo.path(EXTERNAL_GW_INFO).path(EXTERNAL_FIXED_IPS).isMissingNode()) {
+                ArrayNode fixedIpList = (ArrayNode) routerInfo.path(EXTERNAL_GW_INFO).path(EXTERNAL_FIXED_IPS);
+
+                for (JsonNode fixedIpInfo : fixedIpList) {
+                    String subnetId = checkNotNull(fixedIpInfo.path(SUBNET_ID).asText());
+                    String ipAddressStr = checkNotNull(fixedIpInfo.path(IP_ADDRESS).asText());
+                    if (!fixedIpInfo.path(IP_ADDRESS).isMissingNode() && ipAddressStr != null) {
+                        fixedIpMap.put(subnetId, Ip4Address.valueOf(ipAddressStr));
+                    }
+                }
+            }
+
+            osExtBuiler.networkId(externalGatewayNetId)
+                    .enablePnat(true)
+                    .externalFixedIps(fixedIpMap);
+        }
+        OpenstackRouter.Builder osBuilder = new OpenstackRouter.Builder()
+                .tenantId(tenantId)
+                .id(id)
+                .name(name)
+                .status(OpenstackRouter.RouterStatus.valueOf(status))
+                .adminStateUp(Boolean.valueOf(adminStateUp))
+                .gatewayExternalInfo(osExtBuiler.build());
+
+        return osBuilder.build();
+    }
+}
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackRouterInterfaceCodec.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackRouterInterfaceCodec.java
new file mode 100644
index 0000000..01e8d7e
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackRouterInterfaceCodec.java
@@ -0,0 +1,64 @@
+/*
+ * 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.openstackinterface.web;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.openstackinterface.OpenstackRouterInterface;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import static com.google.common.base.Preconditions.checkNotNull;
+/**
+ * Implementation of the OpenstackRouterInterface Codec.
+ */
+public class OpenstackRouterInterfaceCodec extends JsonCodec<OpenstackRouterInterface> {
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    private static final String ID = "id";
+    private static final String TENANT_ID = "tenant_id";
+    private static final String SUBNET_ID = "subnet_id";
+    private static final String PORT_ID = "port_id";
+
+    /**
+     * Decodes the OpenstackRouterInterface.
+     *
+     * @param json    JSON to decode
+     * @param context decoding context
+     * @return OpenstackRouterInterface
+     */
+    @Override
+    public OpenstackRouterInterface decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+        JsonNode routerIfInfo = json;
+
+        String id = checkNotNull(routerIfInfo.path(ID).asText());
+        String tenantId = checkNotNull(routerIfInfo.path(TENANT_ID).asText());
+        String subnetId = checkNotNull(routerIfInfo.path(SUBNET_ID).asText());
+        String portId = checkNotNull(routerIfInfo.path(PORT_ID).asText());
+
+        OpenstackRouterInterface.Builder osBuilder = new OpenstackRouterInterface.Builder()
+                .id(id)
+                .tenantId(tenantId)
+                .subnetId(subnetId)
+                .portId(portId);
+
+        return osBuilder.build();
+    }
+}
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackSecurityGroupCodec.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackSecurityGroupCodec.java
new file mode 100644
index 0000000..b2b0105
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackSecurityGroupCodec.java
@@ -0,0 +1,95 @@
+/*
+ * 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.openstackinterface.web;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.Lists;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.openstackinterface.OpenstackSecurityGroup;
+import org.onosproject.openstackinterface.OpenstackSecurityGroupRule;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collection;
+
+/**
+ * Encodes and decodes the Openstack Security Group.
+ */
+public class OpenstackSecurityGroupCodec extends JsonCodec<OpenstackSecurityGroup> {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    private static final String SECURITY_GROUP = "security_group";
+    private static final String DESCRIPTION = "description";
+    private static final String ID = "id";
+    private static final String NAME = "name";
+    private static final String SECURITY_GROUP_RULES = "security_group_rules";
+    private static final String DIRECTION = "direction";
+    private static final String EHTERTYPE = "ethertype";
+    private static final String PORT_RANGE_MAX = "port_range_max";
+    private static final String PORT_RANGE_MIN = "port_range_min";
+    private static final String PROTOCOL = "protocol";
+    private static final String REMOTE_GROUP_ID = "remote_group_id";
+    private static final String REMOTE_IP_PREFIX = "remote_ip_prefix";
+    private static final String SECURITY_GROUP_ID = "security_group_id";
+    private static final String TENAN_ID = "tenant_id";
+
+    @Override
+    public OpenstackSecurityGroup decode(ObjectNode json, CodecContext context) {
+        JsonNode securityGroupNode = json.get(SECURITY_GROUP);
+        if (securityGroupNode == null) {
+            log.warn("SecurityGroup Json data is null");
+            return null;
+        }
+
+        String description = securityGroupNode.path(DESCRIPTION).asText();
+        String id = securityGroupNode.path(ID).asText();
+        String name = securityGroupNode.path(NAME).asText();
+        ArrayNode ruleInfoList = (ArrayNode) securityGroupNode.path(SECURITY_GROUP_RULES);
+        Collection<OpenstackSecurityGroupRule> rules = Lists.newArrayList();
+        for (JsonNode ruleInfo: ruleInfoList) {
+            OpenstackSecurityGroupRule openstackSecurityGroupRule =
+                    new OpenstackSecurityGroupRule.Builder()
+                        .direction(ruleInfo.path(DIRECTION).asText())
+                        .etherType(ruleInfo.path(EHTERTYPE).asText())
+                        .id(ruleInfo.path(ID).asText())
+                        .portRangeMax(ruleInfo.path(PORT_RANGE_MAX).asText())
+                        .portRangeMin(ruleInfo.path(PORT_RANGE_MIN).asText())
+                        .protocol(ruleInfo.path(PROTOCOL).asText())
+                        .remoteGroupId(ruleInfo.path(REMOTE_GROUP_ID).asText())
+                        .remoteIpPrefix(ruleInfo.path(REMOTE_IP_PREFIX).asText())
+                        .securityGroupId(ruleInfo.path(SECURITY_GROUP_ID).asText())
+                        .tenantId(ruleInfo.path(TENAN_ID).asText())
+                        .build();
+
+            rules.add(openstackSecurityGroupRule);
+        }
+        String tenantId = securityGroupNode.path(TENAN_ID).asText();
+
+        OpenstackSecurityGroup openstackSecurityGroup = OpenstackSecurityGroup.builder()
+                .description(description)
+                .id(id)
+                .name(name)
+                .rules(rules)
+                .tenantId(tenantId)
+                .build();
+
+        return openstackSecurityGroup;
+    }
+}
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackSubnetCodec.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackSubnetCodec.java
new file mode 100644
index 0000000..70ccb96
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/OpenstackSubnetCodec.java
@@ -0,0 +1,85 @@
+/*
+ * 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.openstackinterface.web;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.Lists;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.openstackinterface.OpenstackSubnet;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Encodes and decodes the OpenstackSubnet.
+ */
+public class OpenstackSubnetCodec extends JsonCodec<OpenstackSubnet> {
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    // JSON Field names
+    private static final String SUBNET = "subnet";
+    private static final String NAME = "name";
+    private static final String ENABLE_DHCP = "enable_dhcp";
+    private static final String NETWORK_ID = "network_id";
+    private static final String TENANT_ID = "tenant_id";
+    private static final String DNS_NAMESERVERS = "dns_nameservers";
+    private static final String GATEWAY_IP = "gateway_ip";
+    private static final String CIDR = "cidr";
+    private static final String ID = "id";
+
+    @Override
+    public OpenstackSubnet decode(ObjectNode json, CodecContext context) {
+        checkNotNull(json);
+        JsonNode subnetInfo = json.get(SUBNET);
+        if (subnetInfo == null) {
+            subnetInfo = json;
+        }
+
+        String name = subnetInfo.path(NAME).asText();
+        boolean enableDhcp = subnetInfo.path(ENABLE_DHCP).asBoolean();
+        String networkId = subnetInfo.path(NETWORK_ID).asText();
+        String tenantId = subnetInfo.path(TENANT_ID).asText();
+        ArrayNode dnsNameservsers = (ArrayNode) subnetInfo.path(DNS_NAMESERVERS);
+        List<Ip4Address> dnsList = Lists.newArrayList();
+        if (dnsNameservsers != null && !dnsNameservsers.isMissingNode()) {
+            dnsNameservsers.forEach(dns -> dnsList.add(Ip4Address.valueOf(dns.asText())));
+        }
+        String gatewayIp = subnetInfo.path(GATEWAY_IP).asText();
+        String cidr = subnetInfo.path(CIDR).asText();
+        String id = subnetInfo.path(ID).asText();
+
+        OpenstackSubnet openstackSubnet = OpenstackSubnet.builder()
+                .setName(name)
+                .setEnableDhcp(enableDhcp)
+                .setNetworkId(networkId)
+                .setTenantId(tenantId)
+                .setDnsNameservers(dnsList)
+                .setGatewayIp(gatewayIp)
+                .setCidr(cidr)
+                .setId(id)
+                .build();
+        return openstackSubnet;
+    }
+}
diff --git a/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/package-info.java b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/package-info.java
new file mode 100644
index 0000000..cca89f9
--- /dev/null
+++ b/apps/openstackinterface/app/src/main/java/org/onosproject/openstackinterface/web/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2015-2016 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.
+ */
+
+/**
+ * OpenStack networking implementation.
+ */
+package org.onosproject.openstackinterface.web;