diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/DeviceInformationImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/DeviceInformationImpl.java
new file mode 100755
index 0000000..8e2a0ea
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/DeviceInformationImpl.java
@@ -0,0 +1,163 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.controller.DeviceInformation;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of an OSPF device information.
+ */
+public class DeviceInformationImpl implements DeviceInformation {
+
+    Ip4Address deviceId;
+    Ip4Address routerId;
+    List<Ip4Address> interfaceId = new ArrayList<>();
+    Ip4Address areaId;
+    boolean alreadyCreated;
+    boolean isDr;
+
+    Ip4Address neighborId;
+
+    /**
+     * Gets router id.
+     *
+     * @return router id
+     */
+    public Ip4Address routerId() {
+        return routerId;
+    }
+
+    /**
+     * Sets router id.
+     *
+     * @param routerId router id
+     */
+    public void setRouterId(Ip4Address routerId) {
+        this.routerId = routerId;
+    }
+
+    /**
+     * Gets device id.
+     *
+     * @return device id
+     */
+    public Ip4Address deviceId() {
+        return deviceId;
+    }
+
+    /**
+     * Sets device id.
+     *
+     * @param deviceId device id
+     */
+    public void setDeviceId(Ip4Address deviceId) {
+        this.deviceId = deviceId;
+    }
+
+    /**
+     * Gets interface id list.
+     *
+     * @return interface id list
+     */
+    public List<Ip4Address> interfaceId() {
+        return this.interfaceId;
+    }
+
+    /**
+     * Adds interface id to list.
+     *
+     * @param interfaceId interface id
+     */
+    public void addInterfaceId(Ip4Address interfaceId) {
+        this.interfaceId.add(interfaceId);
+    }
+
+    /**
+     * Gets area id.
+     *
+     * @return area id
+     */
+    public Ip4Address areaId() {
+        return areaId;
+    }
+
+    /**
+     * Sets area id.
+     *
+     * @param areaId area id
+     */
+    public void setAreaId(Ip4Address areaId) {
+        this.areaId = areaId;
+    }
+
+    /**
+     * Gets is already created or not.
+     *
+     * @return true if already created else false
+     */
+    public boolean isAlreadyCreated() {
+        return alreadyCreated;
+    }
+
+    /**
+     * Sets is already created or not.
+     *
+     * @param alreadyCreated true or false
+     */
+    public void setAlreadyCreated(boolean alreadyCreated) {
+        this.alreadyCreated = alreadyCreated;
+    }
+
+    /**
+     * Gets is DR or not.
+     *
+     * @return true if DR else false
+     */
+    public boolean isDr() {
+        return isDr;
+    }
+
+    /**
+     * Stes DR or not.
+     *
+     * @param dr true or false
+     */
+    public void setDr(boolean dr) {
+        this.isDr = dr;
+    }
+
+    /**
+     * Gets neighbor id.
+     *
+     * @return neighbor id
+     */
+    public Ip4Address neighborId() {
+        return neighborId;
+    }
+
+    /**
+     * Sets neighbor id.
+     *
+     * @param neighborId neighbor id
+     */
+    public void setNeighborId(Ip4Address neighborId) {
+        this.neighborId = neighborId;
+    }
+}
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/LinkInformationImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/LinkInformationImpl.java
new file mode 100755
index 0000000..4541ecf
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/LinkInformationImpl.java
@@ -0,0 +1,178 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.controller.LinkInformation;
+
+/**
+ * Representation of an OSPF link information..
+ */
+public class LinkInformationImpl implements LinkInformation {
+
+    String linkId;
+    Ip4Address linkSourceId;
+    Ip4Address linkDestinationId;
+    Ip4Address interfaceIp;
+    boolean linkSrcIdNotRouterId;
+    boolean alreadyCreated;
+    Ip4Address linkSourceIpAddress;
+    Ip4Address linkDestinationIpAddress;
+
+    /**
+     * Gets link id.
+     *
+     * @return link id
+     */
+    public String linkId() {
+        return linkId;
+    }
+
+    /**
+     * Sets link id.
+     *
+     * @param linkId link id
+     */
+    public void setLinkId(String linkId) {
+        this.linkId = linkId;
+    }
+
+    /**
+     * Gets is already created or not.
+     *
+     * @return true if already created else false
+     */
+    public boolean isAlreadyCreated() {
+        return alreadyCreated;
+    }
+
+    /**
+     * Sets is already created or not.
+     *
+     * @param alreadyCreated true or false
+     */
+    public void setAlreadyCreated(boolean alreadyCreated) {
+        this.alreadyCreated = alreadyCreated;
+    }
+
+    /**
+     * Gets is link source id is not router id.
+     *
+     * @return true if link source id is router id else false
+     */
+    public boolean isLinkSrcIdNotRouterId() {
+        return linkSrcIdNotRouterId;
+    }
+
+    /**
+     * Sets is link source id is not router id.
+     *
+     * @param linkSrcIdNotRouterId true or false
+     */
+    public void setLinkSrcIdNotRouterId(boolean linkSrcIdNotRouterId) {
+        this.linkSrcIdNotRouterId = linkSrcIdNotRouterId;
+    }
+
+    /**
+     * Gets link destination id.
+     *
+     * @return link destination id
+     */
+    public Ip4Address linkDestinationId() {
+        return linkDestinationId;
+    }
+
+    /**
+     * Sets link destination id.
+     *
+     * @param linkDestinationId link destination id
+     */
+    public void setLinkDestinationId(Ip4Address linkDestinationId) {
+        this.linkDestinationId = linkDestinationId;
+    }
+
+    /**
+     * Gets link source id.
+     *
+     * @return link source id
+     */
+    public Ip4Address linkSourceId() {
+        return linkSourceId;
+    }
+
+    /**
+     * Sets link source id.
+     *
+     * @param linkSourceId link source id
+     */
+    public void setLinkSourceId(Ip4Address linkSourceId) {
+        this.linkSourceId = linkSourceId;
+    }
+
+    /**
+     * Gets interface IP address.
+     *
+     * @return interface IP address
+     */
+    public Ip4Address interfaceIp() {
+        return interfaceIp;
+    }
+
+    /**
+     * Sets interface IP address.
+     *
+     * @param interfaceIp interface IP address
+     */
+    public void setInterfaceIp(Ip4Address interfaceIp) {
+        this.interfaceIp = interfaceIp;
+    }
+
+    /**
+     * Gets link source IP address.
+     *
+     * @return link source IP address
+     */
+    public Ip4Address linkSourceIpAddress() {
+        return linkSourceIpAddress;
+    }
+
+    /**
+     * Sets link source IP address.
+     *
+     * @param linkSourceIpAddress link source IP address
+     */
+    public void setLinkSourceIpAddress(Ip4Address linkSourceIpAddress) {
+        this.linkSourceIpAddress = linkSourceIpAddress;
+    }
+
+    /**
+     * Gets link destination IP address.
+     *
+     * @return link destination IP address
+     */
+    public Ip4Address linkDestinationIpAddress() {
+        return linkDestinationIpAddress;
+    }
+
+    /**
+     * Sets link destination IP address.
+     *
+     * @param linkDestinationIpAddress link destination IP address
+     */
+    public void setLinkDestinationIpAddress(Ip4Address linkDestinationIpAddress) {
+        this.linkDestinationIpAddress = linkDestinationIpAddress;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfControllerImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfControllerImpl.java
new file mode 100755
index 0000000..f7b4a73
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfControllerImpl.java
@@ -0,0 +1,172 @@
+/*
+ * 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.ospf.controller.impl;
+
+import com.google.common.collect.Sets;
+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.net.driver.DriverService;
+import org.onosproject.ospf.controller.OspfAgent;
+import org.onosproject.ospf.controller.OspfController;
+import org.onosproject.ospf.controller.OspfLinkListener;
+import org.onosproject.ospf.controller.OspfLinkTed;
+import org.onosproject.ospf.controller.OspfProcess;
+import org.onosproject.ospf.controller.OspfRouter;
+import org.onosproject.ospf.controller.OspfRouterListener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Representation of an OSPF controller implementation.
+ * Serves as a one stop shop for obtaining OSPF devices and (un)register listeners on OSPF events
+ */
+@Component(immediate = true)
+@Service
+public class OspfControllerImpl implements OspfController {
+
+    protected static final Logger log = LoggerFactory.getLogger(OspfControllerImpl.class);
+    private final Controller ctrl = new Controller();
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected DriverService driverService;
+    protected Set<OspfRouterListener> ospfRouterListener = new HashSet<>();
+    protected Set<OspfLinkListener> ospfLinkListener = Sets.newHashSet();
+    protected OspfAgent agent = new InternalDeviceConfig();
+
+    @Activate
+    public void activate() {
+        log.info("OSPFControllerImpl activate...!!!");
+        ctrl.start(agent, driverService);
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        ctrl.stop();
+        log.info("Stopped");
+    }
+
+
+    @Override
+    public void addRouterListener(OspfRouterListener listener) {
+        if (!ospfRouterListener.contains(listener)) {
+            this.ospfRouterListener.add(listener);
+        }
+    }
+
+    @Override
+    public void removeRouterListener(OspfRouterListener listener) {
+        this.ospfRouterListener.remove(listener);
+    }
+
+    @Override
+    public void addLinkListener(OspfLinkListener listener) {
+        ospfLinkListener.add(listener);
+
+    }
+
+    @Override
+    public void removeLinkListener(OspfLinkListener listener) {
+        ospfLinkListener.remove(listener);
+
+    }
+
+    @Override
+    public Set<OspfRouterListener> listener() {
+        return ospfRouterListener;
+    }
+
+    @Override
+    public Set<OspfLinkListener> linkListener() {
+        return ospfLinkListener;
+    }
+
+
+    @Override
+    public List<OspfProcess> getAllConfiguredProcesses() {
+        List<OspfProcess> processes = ctrl.getAllConfiguredProcesses();
+        return processes;
+    }
+
+    @Override
+    public void updateConfig(List processes) {
+        List<OspfProcess> ospfProcesses = new ArrayList<>();
+        if (processes != null) {
+            for (Object process : processes) {
+                ospfProcesses.add((OspfProcess) process);
+            }
+        }
+        log.debug("updateConfig::OspfList::processes::{}", ospfProcesses);
+        ctrl.updateConfig(ospfProcesses);
+    }
+
+    @Override
+    public void deleteConfig(List<OspfProcess> processes, String attribute) {
+        List<OspfProcess> ospfProcesses = new ArrayList<>();
+        if (processes != null) {
+            for (Object process : processes) {
+                ospfProcesses.add((OspfProcess) process);
+            }
+        }
+        log.debug("deleteConfig::OspfList::processes::{}", ospfProcesses);
+        ctrl.deleteConfig(ospfProcesses, attribute);
+    }
+
+    /**
+     * Notifier for internal OSPF device and link changes.
+     */
+    private class InternalDeviceConfig implements OspfAgent {
+
+        @Override
+        public boolean addConnectedRouter(OspfRouter ospfRouter) {
+            for (OspfRouterListener l : listener()) {
+                l.routerAdded(ospfRouter);
+            }
+            return true;
+        }
+
+        @Override
+        public void removeConnectedRouter(OspfRouter ospfRouter) {
+            for (OspfRouterListener l : listener()) {
+                l.routerRemoved(ospfRouter);
+            }
+        }
+
+        @Override
+        public void addLink(OspfRouter ospfRouter, OspfLinkTed ospfLinkTed) {
+            for (OspfLinkListener l : linkListener()) {
+                l.addLink(ospfRouter, ospfLinkTed);
+            }
+
+        }
+
+        @Override
+        public void deleteLink(OspfRouter ospfRouter) {
+            for (OspfLinkListener l : linkListener()) {
+                l.deleteLink(ospfRouter);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfDeviceTedImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfDeviceTedImpl.java
new file mode 100755
index 0000000..d93b923
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfDeviceTedImpl.java
@@ -0,0 +1,104 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.Ip6Address;
+import org.onosproject.ospf.controller.OspfDeviceTed;
+
+import java.util.List;
+
+/**
+ * Representation of an OSPF device Traffic Engineering details.
+ */
+public class OspfDeviceTedImpl implements OspfDeviceTed {
+
+    List<Ip4Address> ipv4RouterIds;
+    List<Ip6Address> ipv6RouterIds;
+    List<Short> topologyIds;
+    Boolean asbr;
+    Boolean abr;
+
+    /**
+     * Gets list of IPv4 router id.
+     *
+     * @return list of IPv4 router id
+     */
+    public List<Ip4Address> ipv4RouterIds() {
+        return ipv4RouterIds;
+    }
+
+    @Override
+    public void setIpv4RouterIds(List<Ip4Address> ipv4RouterIds) {
+        this.ipv4RouterIds = ipv4RouterIds;
+    }
+
+    /**
+     * Gets if router is area border router or not.
+     *
+     * @return true if it is area border router else false
+     */
+    public Boolean abr() {
+        return abr;
+    }
+
+    @Override
+    public void setAbr(Boolean abr) {
+        this.abr = abr;
+    }
+
+    /**
+     * Gets if router is autonomous system border router or not.
+     *
+     * @return true or false
+     */
+    public Boolean asbr() {
+        return asbr;
+    }
+
+    @Override
+    public void setAsbr(Boolean asbr) {
+        this.asbr = asbr;
+    }
+
+    /**
+     * Gets list of topology id's.
+     *
+     * @return list of topology id's
+     */
+    public List<Short> topologyIds() {
+        return topologyIds;
+    }
+
+    @Override
+    public void setTopologyIds(List<Short> topologyIds) {
+        this.topologyIds = topologyIds;
+    }
+
+    /**
+     * Gets list of ipv6 router id's.
+     *
+     * @return list of ipv6 router id's
+     */
+    public List<Ip6Address> ipv6RouterIds() {
+        return ipv6RouterIds;
+    }
+
+    @Override
+    public void setIpv6RouterIds(List<Ip6Address> ipv6RouterIds) {
+        this.ipv6RouterIds = ipv6RouterIds;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfLinkTedImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfLinkTedImpl.java
new file mode 100755
index 0000000..b6b2d4f
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfLinkTedImpl.java
@@ -0,0 +1,186 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.Ip6Address;
+import org.onlab.util.Bandwidth;
+import org.onosproject.ospf.controller.OspfLinkTed;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Implements OSPF Link Traffic engineering details.
+ */
+public class OspfLinkTedImpl implements OspfLinkTed {
+
+
+    Bandwidth maximumLink;
+    List<Bandwidth> maxUnResBandwidth = new ArrayList<>();
+    Bandwidth maxReserved;
+    Integer teMetric;
+    List<Ip4Address> ipv4LocRouterId = new ArrayList<>();
+    List<Ip6Address> ipv6LocRouterId = new ArrayList<>();
+    List<Ip4Address> ipv4RemRouterId = new ArrayList<>();
+    List<Ip6Address> ipv6RemRouterId = new ArrayList<>();
+
+
+    /**
+     * Gets maximum link.
+     *
+     * @return maximum link
+     */
+    public Bandwidth maximumLink() {
+        return maximumLink;
+    }
+
+    /**
+     * Sets maximum link.
+     *
+     * @param maximumLink maximum link
+     */
+    public void setMaximumLink(Bandwidth maximumLink) {
+        this.maximumLink = maximumLink;
+    }
+
+    /**
+     * Gets list of IPv6 remote router id.
+     *
+     * @return list of IPv6 remote router id
+     */
+    public List<Ip6Address> ipv6RemRouterId() {
+        return ipv6RemRouterId;
+    }
+
+
+    /**
+     * Sets list of IPv6 remote router id.
+     *
+     * @param ipv6RemRouterId IPv6 remote router id
+     */
+    public void setIpv6RemRouterId(List<Ip6Address> ipv6RemRouterId) {
+        this.ipv6RemRouterId = ipv6RemRouterId;
+    }
+
+    /**
+     * Gets list of IPv4 remote router id.
+     *
+     * @return list of IPv4 remote router id
+     */
+    public List<Ip4Address> ipv4RemRouterId() {
+        return ipv4RemRouterId;
+    }
+
+    /**
+     * Sets IPv4 remote router id.
+     *
+     * @param ipv4RemRouterId IPv4 remote router id
+     */
+    public void setIpv4RemRouterId(List<Ip4Address> ipv4RemRouterId) {
+        this.ipv4RemRouterId = ipv4RemRouterId;
+    }
+
+    /**
+     * Gets list of IPv6 local router id.
+     *
+     * @return list of IPv6 local router id
+     */
+    public List<Ip6Address> ipv6LocRouterId() {
+        return ipv6LocRouterId;
+    }
+
+    /**
+     * Sets list of IPv6 local router id.
+     *
+     * @param ipv6LocRouterId IPv6 local router id
+     */
+    public void setIpv6LocRouterId(List<Ip6Address> ipv6LocRouterId) {
+        this.ipv6LocRouterId = ipv6LocRouterId;
+    }
+
+    /**
+     * Gets list of IPv4 local router id.
+     *
+     * @return list of IPv4 local router id
+     */
+    public List<Ip4Address> ipv4LocRouterId() {
+        return ipv4LocRouterId;
+    }
+
+    /**
+     * Sets list of IPv4 local router id.
+     *
+     * @param ipv4LocRouterId IPv4 local router id
+     */
+    public void setIpv4LocRouterId(List<Ip4Address> ipv4LocRouterId) {
+        this.ipv4LocRouterId = ipv4LocRouterId;
+    }
+
+    /**
+     * Gets traffic engineering metric.
+     *
+     * @return traffic engineering metric
+     */
+    public Integer teMetric() {
+        return teMetric;
+    }
+
+    /**
+     * Sets traffic engineering metric.
+     *
+     * @param teMetric Traffic engineering metric
+     */
+    public void setTeMetric(Integer teMetric) {
+        this.teMetric = teMetric;
+    }
+
+    /**
+     * Gets maximum bandwidth reserved.
+     *
+     * @return maximum bandwidth reserved
+     */
+    public Bandwidth maxReserved() {
+        return maxReserved;
+    }
+
+    /**
+     * Sets maximum bandwidth reserved.
+     *
+     * @param maxReserved maximum bandwidth reserved
+     */
+    public void setMaxReserved(Bandwidth maxReserved) {
+        this.maxReserved = maxReserved;
+    }
+
+    /**
+     * Gets list of maximum unreserved bandwidth.
+     *
+     * @return list of maximum unreserved bandwidth
+     */
+    public List<Bandwidth> maxUnResBandwidth() {
+        return maxUnResBandwidth;
+    }
+
+    /**
+     * Sets ist of maximum unreserved bandwidth.
+     *
+     * @param bandwidth maximum unreserved bandwidth
+     */
+    public void setMaxUnResBandwidth(Bandwidth bandwidth) {
+        this.maxUnResBandwidth.add(bandwidth);
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfMessageDecoder.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfMessageDecoder.java
new file mode 100755
index 0000000..1913c5b
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfMessageDecoder.java
@@ -0,0 +1,58 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+import org.onosproject.ospf.protocol.ospfpacket.OspfMessage;
+import org.onosproject.ospf.protocol.ospfpacket.OspfMessageReader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Decodes an OSPF message from a Channel, for use in a netty pipeline.
+ */
+public class OspfMessageDecoder extends FrameDecoder {
+
+    private static final Logger log = LoggerFactory.getLogger(OspfMessageDecoder.class);
+
+    @Override
+    protected Object decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer channelBuffer) throws Exception {
+        log.debug("OspfMessageDecoder::Message received <:> length {}", channelBuffer.readableBytes());
+        log.debug("channelBuffer.readableBytes - decode {}", channelBuffer.readableBytes());
+        if (!channel.isConnected()) {
+            log.info("Channel is not connected.");
+            return null;
+        }
+
+        OspfMessageReader messageReader = new OspfMessageReader();
+        List<OspfMessage> ospfMessageList = new LinkedList<>();
+
+        while (channelBuffer.readableBytes() > 0) {
+            OspfMessage message = messageReader.readFromBuffer(channelBuffer);
+            if (message != null) {
+                ospfMessageList.add(message);
+            }
+        }
+
+        return ospfMessageList;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfMessageEncoder.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfMessageEncoder.java
new file mode 100755
index 0000000..0a2ea99
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfMessageEncoder.java
@@ -0,0 +1,78 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneEncoder;
+import org.onosproject.ospf.controller.OspfInterface;
+import org.onosproject.ospf.controller.area.OspfInterfaceImpl;
+import org.onosproject.ospf.protocol.ospfpacket.OspfMessage;
+import org.onosproject.ospf.protocol.ospfpacket.OspfMessageWriter;
+import org.onosproject.ospf.protocol.util.OspfInterfaceState;
+import org.onosproject.ospf.protocol.util.OspfUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Encodes an OSPF message for output into a ChannelBuffer, for use in a netty pipeline.
+ */
+public class OspfMessageEncoder extends OneToOneEncoder {
+
+    private static final Logger log = LoggerFactory.getLogger(OspfMessageEncoder.class);
+    private OspfInterface ospfInterface;
+
+
+    /**
+     * Constructor.
+     */
+    OspfMessageEncoder() {
+    }
+
+    /**
+     * Constructor to initialize instance.
+     */
+    OspfMessageEncoder(OspfInterface ospfInterface) {
+        this.ospfInterface = ospfInterface;
+    }
+
+    @Override
+    protected Object encode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
+
+        log.debug("Encoding ospfMessage...!!!");
+        if (!(msg instanceof OspfMessage)) {
+            log.debug("Invalid msg.");
+            return msg;
+        }
+
+        OspfMessage ospfMessage = (OspfMessage) msg;
+        OspfMessageWriter messageWriter = new OspfMessageWriter();
+        if (((OspfInterfaceImpl) ospfInterface).state().equals(OspfInterfaceState.POINT2POINT)) {
+            ospfMessage.setDestinationIp(OspfUtil.ALL_SPF_ROUTERS);
+        }
+        ChannelBuffer buf = messageWriter.writeToBuffer(ospfMessage,
+                                                        ((OspfInterfaceImpl) ospfInterface).state().value(),
+                                                        ospfInterface.interfaceType());
+        log.info("OspfMessageEncoder sending packet of lenght {}", buf.readableBytes());
+        log.debug("OspfMessageEncoder sending packet of lenght {}", buf.readableBytes());
+        log.debug("Sending {} Message to {}, Length :: {}, <=> {}", ospfMessage.ospfMessageType(),
+                  ospfMessage.destinationIp(), buf.readableBytes(), buf.array());
+
+        return buf;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfPipelineFactory.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfPipelineFactory.java
new file mode 100755
index 0000000..62379d4
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfPipelineFactory.java
@@ -0,0 +1,74 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.jboss.netty.channel.ChannelPipeline;
+import org.jboss.netty.channel.ChannelPipelineFactory;
+import org.jboss.netty.channel.Channels;
+import org.jboss.netty.handler.timeout.ReadTimeoutHandler;
+import org.jboss.netty.util.ExternalResourceReleasable;
+import org.jboss.netty.util.HashedWheelTimer;
+import org.jboss.netty.util.Timer;
+import org.onosproject.ospf.controller.OspfArea;
+import org.onosproject.ospf.controller.OspfInterface;
+
+/**
+ * Creates a ChannelPipeline for a server-side OSPF channel.
+ */
+public class OspfPipelineFactory implements ChannelPipelineFactory, ExternalResourceReleasable {
+
+    private static final Timer TIMER = new HashedWheelTimer();
+    private Controller controller;
+    private ReadTimeoutHandler readTimeoutHandler;
+    private OspfArea ospfArea;
+    private OspfInterface ospfInterface;
+    private int holdTime = 120 * 1000;
+
+    /**
+     * Creates an instance of OSPF pipeline factory.
+     *
+     * @param controller    controller instance.
+     * @param ospfArea      OSPF area instance.
+     * @param ospfInterface OSPF interface instance.
+     */
+    public OspfPipelineFactory(Controller controller, OspfArea ospfArea, OspfInterface ospfInterface) {
+        super();
+        this.controller = controller;
+        this.ospfArea = ospfArea;
+        this.ospfInterface = ospfInterface;
+        readTimeoutHandler = new ReadTimeoutHandler(TIMER, holdTime);
+    }
+
+    @Override
+    public ChannelPipeline getPipeline() throws Exception {
+        OspfInterfaceChannelHandler interfaceHandler = new OspfInterfaceChannelHandler(
+                controller, ospfArea, ospfInterface);
+
+        ChannelPipeline pipeline = Channels.pipeline();
+        pipeline.addLast("encoder", new OspfMessageEncoder(ospfInterface));
+        pipeline.addLast("decoder", new OspfMessageDecoder());
+        pipeline.addLast("holdTime", readTimeoutHandler);
+        pipeline.addLast("interfacehandler", interfaceHandler);
+
+        return pipeline;
+    }
+
+    @Override
+    public void releaseExternalResources() {
+        TIMER.stop();
+    }
+
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfRouterImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfRouterImpl.java
new file mode 100755
index 0000000..73664e8
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/OspfRouterImpl.java
@@ -0,0 +1,157 @@
+/*
+ * 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.ospf.controller.impl;
+
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.controller.OspfDeviceTed;
+import org.onosproject.ospf.controller.OspfRouter;
+
+/**
+ * Representation of an OSPF Router.
+ */
+public class OspfRouterImpl implements OspfRouter {
+
+    private Ip4Address routerIp;
+    private Ip4Address areaIdOfInterface;
+    private Ip4Address neighborRouterId;
+    private Ip4Address interfaceId;
+    private OspfDeviceTed deviceTed;
+    private boolean isOpaque;
+    private boolean isDr;
+
+    /**
+     * Gets IP address of the Router.
+     *
+     * @return IP address router
+     */
+    public Ip4Address routerIp() {
+        return routerIp;
+    }
+
+    /**
+     * Sets IP address of the Router.
+     */
+    public void setRouterIp(Ip4Address routerIp) {
+        this.routerIp = routerIp;
+    }
+
+    /**
+     * Gets the area id of this device.
+     *
+     * @return the area id od this device
+     */
+    public Ip4Address areaIdOfInterface() {
+        return areaIdOfInterface;
+    }
+
+    /**
+     * Sets the area id for this device.
+     */
+    public void setAreaIdOfInterface(Ip4Address areaIdOfInterface) {
+        this.areaIdOfInterface = areaIdOfInterface;
+    }
+
+    /**
+     * Gets IP address of the interface.
+     *
+     * @return IP address of the interface
+     */
+    public Ip4Address interfaceId() {
+        return interfaceId;
+    }
+
+    /**
+     * Gets IP address of the interface.
+     *
+     * @param interfaceId IP address of the interface
+     */
+    public void setInterfaceId(Ip4Address interfaceId) {
+        this.interfaceId = interfaceId;
+    }
+
+    /**
+     * Gets List of the device ted.
+     *
+     * @return List of the device ted.
+     */
+    public OspfDeviceTed deviceTed() {
+        return deviceTed;
+    }
+
+    /**
+     * Sets List of the device TED.
+     *
+     * @param deviceTed of the device TED.
+     */
+    public void setDeviceTed(OspfDeviceTed deviceTed) {
+        this.deviceTed = deviceTed;
+    }
+
+    /**
+     * Gets boolean value.
+     *
+     * @return boolean value.
+     */
+    public boolean isOpaque() {
+        return isOpaque;
+    }
+
+    /**
+     * Sets boolean value.
+     *
+     * @param opaque true if opaque else false
+     */
+    public void setOpaque(boolean opaque) {
+        isOpaque = opaque;
+    }
+
+    /**
+     * Gets neighbor's Router id.
+     *
+     * @return neighbor's Router id
+     */
+    public Ip4Address neighborRouterId() {
+        return neighborRouterId;
+    }
+
+    /**
+     * Sets neighbor's Router id.
+     *
+     * @param advertisingRouterId neighbor's Router id
+     */
+    public void setNeighborRouterId(Ip4Address advertisingRouterId) {
+        this.neighborRouterId = advertisingRouterId;
+    }
+
+    /**
+     * Gets if DR or not.
+     *
+     * @return true if DR else false
+     */
+    public boolean isDr() {
+        return isDr;
+    }
+
+    /**
+     * Sets dr or not.
+     *
+     * @param dr true if DR else false
+     */
+    public void setDr(boolean dr) {
+        isDr = dr;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/TopologyForDeviceAndLinkImpl.java b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/TopologyForDeviceAndLinkImpl.java
new file mode 100755
index 0000000..ee0128e
--- /dev/null
+++ b/protocols/ospf/ctl/src/main/java/org/onosproject/ospf/controller/impl/TopologyForDeviceAndLinkImpl.java
@@ -0,0 +1,560 @@
+/*
+* 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.ospf.controller.impl;
+
+import org.onlab.packet.Ip4Address;
+import org.onlab.util.Bandwidth;
+import org.onosproject.ospf.controller.DeviceInformation;
+import org.onosproject.ospf.controller.LinkInformation;
+import org.onosproject.ospf.controller.OspfArea;
+import org.onosproject.ospf.controller.OspfInterface;
+import org.onosproject.ospf.controller.OspfLinkTed;
+import org.onosproject.ospf.controller.OspfLsa;
+import org.onosproject.ospf.controller.OspfLsaType;
+import org.onosproject.ospf.controller.TopologyForDeviceAndLink;
+import org.onosproject.ospf.protocol.lsa.linksubtype.LinkSubType;
+import org.onosproject.ospf.protocol.lsa.linksubtype.LocalInterfaceIpAddress;
+import org.onosproject.ospf.protocol.lsa.linksubtype.MaximumBandwidth;
+import org.onosproject.ospf.protocol.lsa.linksubtype.MaximumReservableBandwidth;
+import org.onosproject.ospf.protocol.lsa.linksubtype.RemoteInterfaceIpAddress;
+import org.onosproject.ospf.protocol.lsa.linksubtype.TrafficEngineeringMetric;
+import org.onosproject.ospf.protocol.lsa.linksubtype.UnreservedBandwidth;
+import org.onosproject.ospf.protocol.lsa.subtypes.OspfLsaLink;
+import org.onosproject.ospf.protocol.lsa.tlvtypes.LinkTlv;
+import org.onosproject.ospf.protocol.lsa.types.NetworkLsa;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa10;
+import org.onosproject.ospf.protocol.lsa.types.RouterLsa;
+import org.onosproject.ospf.protocol.lsa.types.TopLevelTlv;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Represents device and link topology information.
+ */
+public class TopologyForDeviceAndLinkImpl implements TopologyForDeviceAndLink {
+
+    private static final Logger log = LoggerFactory.getLogger(TopologyForDeviceAndLinkImpl.class);
+    private Map<String, DeviceInformation> deviceInformationMap = new LinkedHashMap();
+    private Map<String, DeviceInformation> deviceInformationMapToDelete = new LinkedHashMap();
+    private HashMap<String, Set<OspfLsaLink>> deviceAndLinkInformation = new HashMap();
+    private HashMap<String, OspfLinkTed> ospfLinkTedHashMap = new LinkedHashMap();
+    private Ip4Address drRouter = Ip4Address.valueOf("0.0.0.0");
+    private Ip4Address drRouterOld = Ip4Address.valueOf("0.0.0.0");
+    private Ip4Address adRouterId = Ip4Address.valueOf("0.0.0.0");
+    private Map<String, LinkInformation> linkInformationMap = new LinkedHashMap();
+    private List<String> toRemove = new ArrayList<>();
+
+    /**
+     * Gets device information.
+     *
+     * @return device information
+     */
+    public Map<String, DeviceInformation> deviceInformationMap() {
+        return deviceInformationMap;
+    }
+
+    /**
+     * Sets device information.
+     *
+     * @param key                  key used to add in map
+     * @param deviceInformationMap device information instance
+     */
+    public void setDeviceInformationMap(String key, DeviceInformation deviceInformationMap) {
+        if (deviceInformationMap != null) {
+            this.deviceInformationMap.put(key, deviceInformationMap);
+        }
+
+    }
+
+    /**
+     * Gets device information.
+     *
+     * @return device information to delete from core
+     */
+    public Map<String, DeviceInformation> deviceInformationMapToDelete() {
+        return deviceInformationMapToDelete;
+    }
+
+    /**
+     * Sets device information for removal.
+     *
+     * @param key                          ket used to add in map
+     * @param deviceInformationMapToDelete map from device information to remove
+     */
+    public void setDeviceInformationMapToDelete(String key,
+                                                DeviceInformation deviceInformationMapToDelete) {
+        if (deviceInformationMapToDelete != null) {
+            this.deviceInformationMapToDelete.put(key, deviceInformationMapToDelete);
+        }
+    }
+
+    /**
+     * Removes Device Information.
+     *
+     * @param key ket used to remove from map
+     */
+    public void removeDeviceInformationMapFromDeleteMap(String key) {
+        removeDeviceInformationMap(key);
+        if (this.deviceInformationMapToDelete.containsKey(key)) {
+            this.deviceInformationMapToDelete.remove(key);
+        }
+    }
+
+    /**
+     * Gets Device Information.
+     *
+     * @param key key to store in map
+     * @return Device Information
+     */
+    public DeviceInformation deviceInformation(String key) {
+        DeviceInformation deviceInformation = this.deviceInformationMap.get(key);
+        return deviceInformation;
+    }
+
+    /**
+     * Removes Device Information from map.
+     *
+     * @param key key used to remove from map
+     */
+    public void removeDeviceInformationMap(String key) {
+        if (this.deviceInformationMap.containsKey(key)) {
+            this.deviceInformationMap.remove(key);
+        }
+    }
+
+    /**
+     * Gets link information as map.
+     *
+     * @return link information as map
+     */
+    public Map<String, LinkInformation> linkInformationMap() {
+        return linkInformationMap;
+    }
+
+    /**
+     * Sets link information in map.
+     *
+     * @param key                key used to add in map
+     * @param linkInformationMap link information instance
+     */
+    public void setLinkInformationMap(String key, LinkInformation linkInformationMap) {
+        if (!this.linkInformationMap.containsKey(key)) {
+            this.linkInformationMap.put(key, linkInformationMap);
+        }
+    }
+
+    /**
+     * Removes Link Information from map.
+     *
+     * @param key key used to remove from map
+     */
+    public void removeLinkInformationMap(String key) {
+        if (this.linkInformationMap.containsKey(key)) {
+            this.linkInformationMap.remove(key);
+        }
+    }
+
+
+    /**
+     * Gets OSPF Link TED details from the map.
+     *
+     * @param key key used to retreive from map
+     * @return OSPF link ted instance
+     */
+    public OspfLinkTed getOspfLinkTedHashMap(String key) {
+        OspfLinkTed ospfLinkTed = ospfLinkTedHashMap.get(key);
+        return ospfLinkTed;
+    }
+
+    /**
+     * Adds device information to map.
+     *
+     * @param ospfLsa       OSPF LSA instance
+     * @param ospfInterface OSPF interface instance
+     * @param ospfArea      OSPF area instance
+     */
+    public void addLocalDevice(OspfLsa ospfLsa, OspfInterface ospfInterface, OspfArea ospfArea) {
+        if (ospfLsa.getOspfLsaType().equals(OspfLsaType.ROUTER)) {
+            createDeviceAndLinkFromRouterLsa(ospfLsa, ospfArea);
+        } else if (ospfLsa.getOspfLsaType().equals(OspfLsaType.NETWORK)) {
+            createDeviceAndLinkFromNetworkLsa(ospfLsa, ospfArea);
+        } else if (ospfLsa.getOspfLsaType().equals(OspfLsaType.AREA_LOCAL_OPAQUE_LSA)) {
+            createDeviceAndLinkFromOpaqueLsa(ospfLsa, ospfArea);
+        }
+    }
+
+    /**
+     * Creates device object from parameters.
+     *
+     * @param alreadyCreated device already created or not
+     * @param deviceId       device id
+     * @param neighborId     neighbor's id
+     * @param routerId       router's id
+     * @param interfaceId    interface id
+     * @param areaId         area id
+     * @param isDr           true if router is DR else false
+     */
+    private DeviceInformation createDeviceInformation(boolean alreadyCreated, Ip4Address deviceId,
+                                                      Ip4Address neighborId, Ip4Address routerId,
+                                                      Ip4Address interfaceId, Ip4Address areaId,
+                                                      boolean isDr) {
+        DeviceInformation deviceInformation = new DeviceInformationImpl();
+        deviceInformation.setAlreadyCreated(alreadyCreated);
+        deviceInformation.setDeviceId(deviceId);
+        deviceInformation.setNeighborId(neighborId);
+        deviceInformation.setRouterId(routerId);
+        deviceInformation.addInterfaceId(interfaceId);
+        deviceInformation.setAreaId(areaId);
+        deviceInformation.setDr(isDr);
+        return deviceInformation;
+    }
+
+    /**
+     * Creates Device and Link instance from the RouterLsa parameters.
+     *
+     * @param ospfLsa  OSPF LSA instance
+     * @param ospfArea OSPF area
+     */
+    private void createDeviceAndLinkFromRouterLsa(OspfLsa ospfLsa, OspfArea ospfArea) {
+        RouterLsa routerLsa = (RouterLsa) ospfLsa;
+        List<OspfLsaLink> ospfLsaLinkList = routerLsa.routerLink();
+        Iterator iterator = ospfLsaLinkList.iterator();
+        Ip4Address advertisingRouterId = routerLsa.advertisingRouter();
+        adRouterId = advertisingRouterId;
+        while (iterator.hasNext()) {
+            OspfLsaLink ospfLsaLink = (OspfLsaLink) iterator.next();
+            Ip4Address linkId = Ip4Address.valueOf(ospfLsaLink.linkId());
+            Ip4Address linkData = Ip4Address.valueOf(ospfLsaLink.linkData());
+            if (ospfLsaLink.linkType() == 1) {
+                if ((advertisingRouterId.equals(ospfArea.routerId())) || (linkId.equals(ospfArea.routerId()))) {
+                    System.out.println("OspfInterface information will not display in web ");
+                } else {
+                    removeDevice(advertisingRouterId);
+                    removeLinks(advertisingRouterId);
+                    DeviceInformation deviceInformationPointToPoint =
+                            createDeviceInformation(false, linkId, linkId, advertisingRouterId, linkData,
+                                                    ospfArea.areaId(), false);
+                    String key = "device:" + advertisingRouterId;
+                    setDeviceInformationMap(key, deviceInformationPointToPoint);
+                    String linkIdKey = "linkId:" + advertisingRouterId + "-" + linkId;
+                    addLocalLink(linkIdKey, linkData, advertisingRouterId, linkId, true, false);
+                }
+            } else if (ospfLsaLink.linkType() == 2) {
+
+                if ((advertisingRouterId.equals(ospfArea.routerId())) || (linkId.equals(ospfArea.routerId()))) {
+                    log.debug("OspfInterface information will not display in web ");
+                } else {
+                    if (linkId.equals(linkData)) {
+                        if (drRouter.equals(Ip4Address.valueOf("0.0.0.0"))) {
+                            log.debug("drRouter not elected {} ", drRouter.toString());
+                        } else {
+                            if (drRouterOld.equals(linkId)) {
+                                log.debug("drRouterOld same as link id {} ", drRouterOld.toString());
+                            } else {
+                                String key = "device:" + drRouterOld;
+                                DeviceInformation deviceInformation1 = deviceInformation(key);
+                                if (deviceInformation1 != null) {
+                                    deviceInformation1.setAlreadyCreated(true);
+                                    setDeviceInformationMapToDelete(key, deviceInformation1);
+                                    String linkIdKey = "linkId:" + linkId + "-" + deviceInformation1.neighborId();
+                                    addLocalLink(linkIdKey, linkData, linkId, deviceInformation1.neighborId(),
+                                                 true, false);
+                                    String linkIdKey1 = "linkId:" + linkId + "-" + advertisingRouterId;
+                                    addLocalLink(linkIdKey1, linkData, linkId, advertisingRouterId, true, false);
+                                } else {
+                                    DeviceInformation deviceInformationToDelete =
+                                            createDeviceInformation(true, drRouterOld, drRouterOld,
+                                                                    drRouterOld, drRouterOld,
+                                                                    drRouterOld, true);
+                                    setDeviceInformationMapToDelete(key, deviceInformationToDelete);
+                                    String linkIdKey1 = "linkId:" + linkId + "-" + advertisingRouterId;
+                                    addLocalLink(linkIdKey1, linkData, linkId, advertisingRouterId, true, false);
+                                }
+                            }
+                        }
+                        drRouter = linkId;
+                        drRouterOld = linkId;
+                        DeviceInformation deviceInformationForDr =
+                                createDeviceInformation(false, linkId, advertisingRouterId, linkId, linkData,
+                                                        ospfArea.areaId(), true);
+                        String key = "device:" + linkId;
+                        setDeviceInformationMap(key, deviceInformationForDr);
+                        DeviceInformation deviceInformationForAdvertisingRouter =
+                                createDeviceInformation(false, linkId, advertisingRouterId, advertisingRouterId,
+                                                        linkData, ospfArea.areaId(), false);
+                        String key1 = "device:" + advertisingRouterId;
+                        setDeviceInformationMap(key1, deviceInformationForAdvertisingRouter);
+                        if (drRouter.equals(Ip4Address.valueOf("0.0.0.0"))) {
+                            System.out.println("Link will not get create since dr is not valid");
+                            //Need to analysis since this place will not get Dr information
+                            String linkIdKey = "linkId:" + linkId + "-" + advertisingRouterId;
+                            addLocalLink(linkIdKey, linkData, linkId, advertisingRouterId, true, false);
+                        } else {
+                            String linkIdKey = "linkId:" + drRouter + "-" + advertisingRouterId;
+                            addLocalLink(linkIdKey, linkData, drRouter, advertisingRouterId, true, false);
+                        }
+                    } else {
+                        DeviceInformation deviceInformationDrOther =
+                                createDeviceInformation(false, linkId, linkId, advertisingRouterId,
+                                                        linkData, ospfArea.areaId(), false);
+                        String key = "device:" + advertisingRouterId;
+                        setDeviceInformationMap(key, deviceInformationDrOther);
+                        if (drRouter.equals(Ip4Address.valueOf("0.0.0.0"))) {
+                            String linkIdKey = "linkId:" + linkId + "-" + advertisingRouterId;
+                            addLocalLink(linkIdKey, linkData, linkId, advertisingRouterId, true, false);
+                        } else {
+                            String linkIdKey = "linkId:" + drRouter + "-" + advertisingRouterId;
+                            addLocalLink(linkIdKey, linkData, drRouter, advertisingRouterId, true, false);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Creates Device and Link instance from the NetworkLsa parameters.
+     *
+     * @param ospfLsa  OSPF LSA instance
+     * @param ospfArea OSPF area instance
+     */
+    private void createDeviceAndLinkFromNetworkLsa(OspfLsa ospfLsa, OspfArea ospfArea) {
+        NetworkLsa networkLsa = (NetworkLsa) ospfLsa;
+        Ip4Address advertisingRouterId = networkLsa.networkMask();
+        System.out.println("AdvertisingRouterId is : " + advertisingRouterId);
+    }
+
+    /**
+     * Creates Device and Link instance from the OpaqueLsa parameters.
+     *
+     * @param ospfLsa  OSPF LSA instance
+     * @param ospfArea OSPF area instance
+     */
+    private void createDeviceAndLinkFromOpaqueLsa(OspfLsa ospfLsa, OspfArea ospfArea) {
+        OspfLinkTed ospfLinkTed = new OspfLinkTedImpl();
+        OpaqueLsa10 opaqueLsa10 = (OpaqueLsa10) ospfLsa;
+        List<TopLevelTlv> topLevelTlvList = opaqueLsa10.topLevelValues();
+        for (TopLevelTlv topLevelTlv : topLevelTlvList) {
+            if (topLevelTlv instanceof LinkTlv) {
+                LinkTlv linkTlv = (LinkTlv) topLevelTlv;
+                List<LinkSubType> subTypes = linkTlv.subTlvList();
+                for (LinkSubType type : subTypes) {
+                    if (type instanceof UnreservedBandwidth) {
+                        UnreservedBandwidth unreservedBandwidth = (UnreservedBandwidth) type;
+                        List<Float> bandwidthFloatValues = unreservedBandwidth.getUnReservedBandwidthValue();
+                        List<Bandwidth> bandwidthList = new ArrayList<>();
+                        for (Float value : bandwidthFloatValues) {
+                            Bandwidth bandwidth = Bandwidth.bps((double) value);
+                            ospfLinkTed.setMaxUnResBandwidth(bandwidth);
+                            bandwidthList.add(bandwidth);
+                        }
+                    }
+                    if (type instanceof MaximumBandwidth) {
+                        MaximumBandwidth maximumBandwidth = (MaximumBandwidth) type;
+                        float maxBandValue = maximumBandwidth.getMaximumBandwidthValue();
+                        Bandwidth bandwidth = Bandwidth.bps((double) maxBandValue);
+                        ospfLinkTed.setMaximumLink(bandwidth);
+                    }
+                    if (type instanceof MaximumReservableBandwidth) {
+                        MaximumReservableBandwidth maximumReservableBandwidth = (MaximumReservableBandwidth) type;
+                        float maxResBandValue = maximumReservableBandwidth.getMaximumBandwidthValue();
+                        Bandwidth bandwidth = Bandwidth.bps((double) maxResBandValue);
+                        ospfLinkTed.setMaxReserved(bandwidth);
+                    }
+                    if (type instanceof TrafficEngineeringMetric) {
+                        TrafficEngineeringMetric trafficEngineeringMetric = (TrafficEngineeringMetric) type;
+                        long teMetric = trafficEngineeringMetric.getTrafficEngineeringMetricValue();
+                        ospfLinkTed.setTeMetric((Integer) (int) teMetric);
+                    }
+                    if (type instanceof LocalInterfaceIpAddress) {
+                        LocalInterfaceIpAddress localInterfaceIpAddress = (LocalInterfaceIpAddress) type;
+                        List<String> stringValue = localInterfaceIpAddress.getLocalInterfaceIPAddress();
+                        List<Ip4Address> localIp4Address = new ArrayList<>();
+                        for (String value : stringValue) {
+                            Ip4Address ip4Address = Ip4Address.valueOf(value);
+                            localIp4Address.add(ip4Address);
+                        }
+                        ospfLinkTed.setIpv4LocRouterId(localIp4Address);
+                    }
+                    if (type instanceof RemoteInterfaceIpAddress) {
+                        RemoteInterfaceIpAddress remoteInterfaceIpAddress = (RemoteInterfaceIpAddress) type;
+                        List<String> stringValue = remoteInterfaceIpAddress.getRemoteInterfaceAddress();
+                        List<Ip4Address> remoteIp4Address = new ArrayList<>();
+                        for (String value : stringValue) {
+                            Ip4Address ip4Address = Ip4Address.valueOf(value);
+                            remoteIp4Address.add(ip4Address);
+                        }
+                        ospfLinkTed.setIpv4RemRouterId(remoteIp4Address);
+                    }
+                }
+            }
+
+        }
+        ospfLinkTedHashMap.put(adRouterId.toString(), ospfLinkTed);
+    }
+
+
+    /**
+     * Adds link information to LinkInformationMap.
+     *
+     * @param advertisingRouter    advertising router
+     * @param linkData             link data address
+     * @param linkSrc              link source address
+     * @param linkDest             link destination address
+     * @param opaqueEnabled        opaque enabled or not
+     * @param linkSrcIdNotRouterId link source id or not
+     */
+    public void addLocalLink(String advertisingRouter, Ip4Address linkData, Ip4Address linkSrc, Ip4Address linkDest,
+                             boolean opaqueEnabled, boolean linkSrcIdNotRouterId) {
+        String linkKey = "link:";
+        LinkInformation linkInformation = new LinkInformationImpl();
+        linkInformation.setLinkId(advertisingRouter);
+        linkInformation.setLinkSourceId(linkSrc);
+        linkInformation.setLinkDestinationId(linkDest);
+        linkInformation.setAlreadyCreated(false);
+        linkInformation.setLinkSrcIdNotRouterId(linkSrcIdNotRouterId);
+        linkInformation.setInterfaceIp(linkData);
+        if (linkDest != null) {
+            linkInformation.setLinkSrcIdNotRouterId(false);
+        }
+        linkKey = linkKey + "-" + linkSrc + "-" + linkDest;
+        setLinkInformationMap(linkKey, linkInformation);
+    }
+
+    /**
+     * Removes links from LinkInformationMap.
+     *
+     * @param routerId router id
+     */
+    public void removeLinks(Ip4Address routerId) {
+        Map<String, LinkInformation> linkInformationMaplocal = linkInformationMap;
+        if (linkInformationMaplocal != null) {
+            for (Map.Entry<String, LinkInformation> entry : linkInformationMap.entrySet()) {
+                String key = entry.getKey();
+                boolean check = key.contains(routerId.toString());
+                LinkInformation linkInformation = linkInformationMap.get(key);
+                boolean check1 = (linkInformation.linkDestinationId() == routerId) ? true : false;
+                if (check || check1) {
+                    toRemove.add(key);
+                }
+            }
+            removeLinkFromMap();
+        }
+    }
+
+    /**
+     * Removes Device from DeviceInformationMap.
+     *
+     * @param routerId router id
+     */
+    public void removeDevice(Ip4Address routerId) {
+        String key = "device:" + routerId;
+        this.deviceInformationMap.remove(key);
+    }
+
+    /**
+     * Removes link information from Map.
+     */
+    private void removeLinkFromMap() {
+        Iterator iterator = toRemove.iterator();
+        while (iterator.hasNext()) {
+            String key = (String) iterator.next();
+            removeLinkInformationMap(key);
+        }
+    }
+
+    /**
+     * Updates the deviceAndLinkInformation list for received OSPF LSA.
+     *
+     * @param ospfLsa  OSPF LSA  instance
+     * @param ospfArea OSPF area instance
+     */
+    public void updateLinkInformation(OspfLsa ospfLsa, OspfArea ospfArea) {
+        if (ospfLsa.getOspfLsaType().equals(OspfLsaType.ROUTER)) {
+            RouterLsa routerLsa = (RouterLsa) ospfLsa;
+            routerLsa.lsType();
+            List<OspfLsaLink> ospfLsaLinkList = routerLsa.routerLink();
+            for (OspfLsaLink link : ospfLsaLinkList) {
+                if (link.linkType == 1 || link.linkType == 2) {
+                    if ((routerLsa.advertisingRouter().equals(ospfArea.routerId())) ||
+                            (link.equals(ospfArea.routerId()))) {
+                        log.debug("OspfInterface information will not display in web ");
+                    } else {
+                        String key = routerLsa.advertisingRouter() + "-" + link.linkData();
+                        Set<OspfLsaLink> linkInformations = new HashSet<>();
+                        if (deviceAndLinkInformation.containsKey(key)) {
+                            linkInformations = deviceAndLinkInformation.get(key);
+                            linkInformations.add(link);
+                            deviceAndLinkInformation.put(key, linkInformations);
+                        } else {
+                            linkInformations.add(link);
+                            deviceAndLinkInformation.put(key, linkInformations);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Gets all the router information which needs to delete from deviceList.
+     *
+     * @param ospfLsa  OSPF LSA instance
+     * @param ospfArea OSPF area instance
+     * @return list of deleted router information
+     */
+    public List<String> getDeleteRouterInformation(OspfLsa ospfLsa, OspfArea ospfArea) {
+        List<String> removedLinkList = new ArrayList<>();
+        if (ospfLsa.getOspfLsaType().equals(OspfLsaType.ROUTER)) {
+
+            RouterLsa routerLsa = (RouterLsa) ospfLsa;
+            List<OspfLsaLink> ospfLsaLinkList = routerLsa.routerLink();
+            for (OspfLsaLink link : ospfLsaLinkList) {
+                if (link.linkType == 1 || link.linkType == 2) {
+                    if ((routerLsa.advertisingRouter().equals(ospfArea.routerId())) ||
+                            (link.equals(ospfArea.routerId()))) {
+                        log.debug("OspfInterface information will not display in web ");
+                    } else {
+                        String key = routerLsa.advertisingRouter() + "-" + link.linkData();
+                        Set<OspfLsaLink> linkInformations = deviceAndLinkInformation.get(key);
+                        if (linkInformations.contains(link)) {
+                            linkInformations.remove(link);
+                            deviceAndLinkInformation.put(key, linkInformations);
+                        }
+                    }
+                }
+                Set<String> keys = deviceAndLinkInformation.keySet();
+                for (String key : keys) {
+                    Set<OspfLsaLink> linkInformations = deviceAndLinkInformation.get(key);
+                    for (OspfLsaLink link1 : linkInformations) {
+                        String removedLink = link1.linkId();
+                        removedLinkList.add(removedLink);
+                    }
+                }
+            }
+        }
+        return removedLinkList;
+    }
+}
\ No newline at end of file