diff --git a/protocols/ospf/protocol/src/main/java/org/onosproject/ospf/protocol/ospfpacket/types/LsUpdate.java b/protocols/ospf/protocol/src/main/java/org/onosproject/ospf/protocol/ospfpacket/types/LsUpdate.java
new file mode 100644
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+++ b/protocols/ospf/protocol/src/main/java/org/onosproject/ospf/protocol/ospfpacket/types/LsUpdate.java
@@ -0,0 +1,310 @@
+/*
+ * 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.protocol.ospfpacket.types;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.primitives.Bytes;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.ospf.controller.OspfLsa;
+import org.onosproject.ospf.exceptions.OspfErrorType;
+import org.onosproject.ospf.exceptions.OspfParseException;
+import org.onosproject.ospf.protocol.lsa.LsaHeader;
+import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader;
+import org.onosproject.ospf.protocol.lsa.types.AsbrSummaryLsa;
+import org.onosproject.ospf.protocol.lsa.types.ExternalLsa;
+import org.onosproject.ospf.protocol.lsa.types.NetworkLsa;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa10;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa11;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa9;
+import org.onosproject.ospf.protocol.lsa.types.RouterLsa;
+import org.onosproject.ospf.protocol.lsa.types.SummaryLsa;
+import org.onosproject.ospf.protocol.ospfpacket.OspfPacketHeader;
+import org.onosproject.ospf.protocol.util.OspfPacketType;
+import org.onosproject.ospf.protocol.util.OspfParameters;
+import org.onosproject.ospf.protocol.util.OspfUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Representation of an OSPF Link State Update packet.
+ * Link State Update packets are OSPF packet type 4.  These packets
+ * implement the flooding of LSAs.  Each Link State Update packet
+ * carries a collection of LSAs one hop further from their origin.
+ * Several LSAs may be included in a single packet.
+ */
+public class LsUpdate extends OspfPacketHeader {
+    /*
+        0                   1                   2                   3
+        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |   Version #   |       4       |         Packet length         |
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |                          Router ID                            |
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |                           Area ID                             |
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |           Checksum            |             AuType            |
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |                       Authentication                          |
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |                       Authentication                          |
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |                            # LSAs                             |
+       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+       |                                                               |
+       +-                                                            +-+
+       |                             LSAs                              |
+       +-                                                            +-+
+       |                              ...                              |
+     */
+    private static final Logger log = LoggerFactory.getLogger(LsUpdate.class);
+    private int numberOfLsa;
+    private List<OspfLsa> lsaList = new LinkedList<>();
+
+    /**
+     * Creates an instance of Link State Update packet.
+     */
+    public LsUpdate() {
+    }
+
+    /**
+     * Creates an instance of Link State Update packet.
+     *
+     * @param ospfHeader ospf header instance.
+     */
+    public LsUpdate(OspfPacketHeader ospfHeader) {
+        populateHeader(ospfHeader);
+    }
+
+    /**
+     * Gets the LSA list.
+     *
+     * @return list of LSA
+     */
+    public List getLsaList() {
+        return lsaList;
+    }
+
+    /**
+     * Adds the LSA to list.
+     *
+     * @param lsa LSA
+     */
+    public void addLsa(OspfLsa lsa) {
+        if (!lsaList.contains(lsa)) {
+            lsaList.add(lsa);
+        }
+    }
+
+    /**
+     * Gets the number of LSA.
+     *
+     * @return number of LSA
+     */
+    public int noLsa() {
+        return numberOfLsa;
+    }
+
+    /**
+     * Sets number of LSA.
+     *
+     * @param numberOfLsa number of LSA
+     */
+    public void setNumberOfLsa(int numberOfLsa) {
+        this.numberOfLsa = numberOfLsa;
+    }
+
+
+    @Override
+    public OspfPacketType ospfMessageType() {
+        return OspfPacketType.LSUPDATE;
+    }
+
+    @Override
+    public void readFrom(ChannelBuffer channelBuffer) throws OspfParseException {
+        try {
+            //From header 4 bytes is number of lsa's
+            this.setNumberOfLsa(channelBuffer.readInt());
+            //get the remaining bytes represents Number of LSA's present. Add all the LSA's
+            while (channelBuffer.readableBytes() > OspfUtil.LSA_HEADER_LENGTH) {
+
+                LsaHeader header = OspfUtil.readLsaHeader(channelBuffer.readBytes(OspfUtil.LSA_HEADER_LENGTH));
+                int lsaLength = header.lsPacketLen();
+                int lsType = header.lsType();
+
+                switch (lsType) {
+                    case OspfParameters.LINK_LOCAL_OPAQUE_LSA:
+                        OpaqueLsa9 opaqueLsa9 = new OpaqueLsa9((OpaqueLsaHeader) header);
+                        opaqueLsa9.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(opaqueLsa9);
+                        break;
+                    case OspfParameters.AREA_LOCAL_OPAQUE_LSA:
+                        OpaqueLsa10 opaqueLsa10 = new OpaqueLsa10((OpaqueLsaHeader) header);
+                        opaqueLsa10.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(opaqueLsa10);
+                        break;
+                    case OspfParameters.AS_OPAQUE_LSA:
+                        OpaqueLsa11 opaqueLsa11 = new OpaqueLsa11((OpaqueLsaHeader) header);
+                        opaqueLsa11.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(opaqueLsa11);
+                        break;
+                    case OspfParameters.ROUTER:
+                        RouterLsa routerLsa = new RouterLsa(header);
+                        routerLsa.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(routerLsa);
+                        break;
+                    case OspfParameters.NETWORK:
+                        NetworkLsa networkLsa = new NetworkLsa(header);
+                        networkLsa.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(networkLsa);
+                        break;
+                    case OspfParameters.ASBR_SUMMARY:
+                        AsbrSummaryLsa asbrSummaryLsa = new AsbrSummaryLsa(header);
+                        asbrSummaryLsa.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(asbrSummaryLsa);
+                        break;
+                    case OspfParameters.SUMMARY:
+                        SummaryLsa summaryLSA = new SummaryLsa(header);
+                        summaryLSA.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(summaryLSA);
+                        break;
+                    case OspfParameters.EXTERNAL_LSA:
+                        ExternalLsa externalLsa = new ExternalLsa(header);
+                        externalLsa.readFrom(channelBuffer.readBytes(lsaLength - OspfUtil.LSA_HEADER_LENGTH));
+                        addLsa(externalLsa);
+                        break;
+                    default:
+                        log.debug("LSUpdate::readLsUpdateBody::UnKnown LS Type: {}", lsType);
+                        break;
+                }
+            }
+        } catch (Exception e) {
+            log.debug("Error::LsUpdate:: {}", e.getMessage());
+            throw new OspfParseException(OspfErrorType.MESSAGE_HEADER_ERROR, OspfErrorType.BAD_MESSAGE_LENGTH);
+        }
+    }
+
+    @Override
+    public byte[] asBytes() {
+        byte[] lsuMessage = null;
+
+        byte[] ospfHeader = getLsuHeaderAsByteArray();
+        byte[] lsuBody = getLsuBodyAsByteArray();
+        lsuMessage = Bytes.concat(ospfHeader, lsuBody);
+
+        return lsuMessage;
+    }
+
+    /**
+     * Gets lsu header.
+     *
+     * @return lsu header as byte array
+     */
+    public byte[] getLsuHeaderAsByteArray() {
+        List<Byte> headerLst = new ArrayList<>();
+        try {
+            headerLst.add((byte) this.ospfVersion());
+            headerLst.add((byte) this.ospfType());
+            headerLst.addAll(Bytes.asList(OspfUtil.convertToTwoBytes(this.ospfPacLength())));
+            headerLst.addAll(Bytes.asList(this.routerId().toOctets()));
+            headerLst.addAll(Bytes.asList(this.areaId().toOctets()));
+            headerLst.addAll(Bytes.asList(OspfUtil.convertToTwoBytes(this.checksum())));
+            headerLst.addAll(Bytes.asList(OspfUtil.convertToTwoBytes(this.authType())));
+            //Authentication is 0 always. Total 8 bytes consist of zero
+            byte[] auth = new byte[OspfUtil.EIGHT_BYTES];
+            headerLst.addAll(Bytes.asList(auth));
+        } catch (Exception e) {
+            log.debug("Error::LSUpdate::getLsuHeaderAsByteArray:: {}", e.getMessage());
+            return Bytes.toArray(headerLst);
+        }
+
+        return Bytes.toArray(headerLst);
+    }
+
+    /**
+     * Get lsu body as byte array.
+     *
+     * @return lsu body as byte array
+     */
+    public byte[] getLsuBodyAsByteArray() {
+        List<Byte> bodyLst = new ArrayList<>();
+
+        try {
+            //add number of LSA's
+            bodyLst.addAll(Bytes.asList(OspfUtil.convertToFourBytes(this.noLsa())));
+            //for each type of LSA's from the list get lsa bytes
+            for (OspfLsa ospfLsa : lsaList) {
+                //Check the type of lsa and build bytes accordingly
+                switch (ospfLsa.getOspfLsaType().value()) {
+                    case OspfParameters.LINK_LOCAL_OPAQUE_LSA:
+                        OpaqueLsa9 opaqueLsa9 = (OpaqueLsa9) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(opaqueLsa9.asBytes()));
+                        break;
+                    case OspfParameters.AREA_LOCAL_OPAQUE_LSA:
+                        OpaqueLsa10 opaqueLsa10 = (OpaqueLsa10) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(opaqueLsa10.asBytes()));
+                        break;
+                    case OspfParameters.AS_OPAQUE_LSA:
+                        OpaqueLsa11 opaqueLsa11 = (OpaqueLsa11) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(opaqueLsa11.asBytes()));
+                        break;
+                    case OspfParameters.ROUTER:
+                        RouterLsa routerLsa = (RouterLsa) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(routerLsa.asBytes()));
+                        break;
+                    case OspfParameters.NETWORK:
+                        NetworkLsa networkLsa = (NetworkLsa) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(networkLsa.asBytes()));
+                        break;
+                    case OspfParameters.ASBR_SUMMARY:
+                        AsbrSummaryLsa asbrSummaryLsa = (AsbrSummaryLsa) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(asbrSummaryLsa.asBytes()));
+                        break;
+                    case OspfParameters.SUMMARY:
+                        SummaryLsa summaryLsa = (SummaryLsa) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(summaryLsa.asBytes()));
+                        break;
+                    case OspfParameters.EXTERNAL_LSA:
+                        ExternalLsa externalLsa = (ExternalLsa) ospfLsa;
+                        bodyLst.addAll(Bytes.asList(externalLsa.asBytes()));
+                        break;
+                    default:
+                        log.debug("LSUpdate::getLsuBodyAsByteArray::UnKnown ospfLsa: {}", ospfLsa);
+                        break;
+                }
+            }
+
+        } catch (Exception e) {
+            log.debug("Error::getLsuBodyAsByteArray {}", e.getMessage());
+            return Bytes.toArray(bodyLst);
+        }
+
+        return Bytes.toArray(bodyLst);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("noLsa", numberOfLsa)
+                .add("lsaList", lsaList)
+                .toString();
+    }
+}
\ No newline at end of file