diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/AttachedToOtherAreas.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/AttachedToOtherAreas.java
new file mode 100644
index 0000000..3dfa308
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/AttachedToOtherAreas.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2016-present 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.isis.io.isispacket.pdu;
+
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Representation of attached to other areas.
+ */
+public enum AttachedToOtherAreas {
+    DEFAULTMETRIC(1),
+    DELAYMETRIC(2),
+    EXPENSEMETRIC(4),
+    ERRORMETRIC(8),
+    NONE(0);
+    // Reverse lookup table
+    private static final Map<Integer, AttachedToOtherAreas> LOOKUP = new HashMap<>();
+
+    // Populate the lookup table on loading time
+    static {
+        for (AttachedToOtherAreas attachedToOtherAreas :
+                EnumSet.allOf(AttachedToOtherAreas.class)) {
+            LOOKUP.put(attachedToOtherAreas.value(), attachedToOtherAreas);
+        }
+    }
+
+    private int value;
+
+    /**
+     * Returns the attached to other areas value.
+     *
+     * @param value attached to other areas value
+     */
+    AttachedToOtherAreas(int value) {
+        this.value = value;
+    }
+
+    /**
+     * Returns the value for attached to other areas from pdu type value.
+     *
+     * @param pduTypeValue to get attached areas value
+     * @return attachedToOtherAreas value of the enum
+     */
+    public static AttachedToOtherAreas get(int pduTypeValue) {
+        return LOOKUP.get(pduTypeValue);
+    }
+
+    /**
+     * Returns the value representing PDU type.
+     *
+     * @return value represents PDU type
+     */
+    public int value() {
+        return value;
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/Csnp.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/Csnp.java
new file mode 100644
index 0000000..80dc5b1
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/Csnp.java
@@ -0,0 +1,272 @@
+/*
+ * Copyright 2016-present 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.isis.io.isispacket.pdu;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import com.google.common.primitives.Bytes;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.isis.io.isispacket.IsisHeader;
+import org.onosproject.isis.io.isispacket.tlv.IsisTlv;
+import org.onosproject.isis.io.isispacket.tlv.TlvFinder;
+import org.onosproject.isis.io.isispacket.tlv.TlvHeader;
+import org.onosproject.isis.io.isispacket.tlv.TlvType;
+import org.onosproject.isis.io.isispacket.tlv.TlvsToBytes;
+import org.onosproject.isis.io.util.IsisUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of complete sequence number PDU.
+ */
+public class Csnp extends IsisHeader {
+
+    /*
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |             Intra-domain Routing Protocol  Discriminator       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Length Indicator                     |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           Version/Protocol ID Extension       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           ID Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |     R     |     R     |    R      |       PDU Type            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Version                              |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Reserved                             |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                     Maximum area address                      |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          PDU Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                         Source ID                             |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                       Start LSP ID                            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                        End LSP ID                             |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                      Variable Lengths Fields                  |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+        CSNP Message Format
+        REFERENCE : ISO/IEC 10589
+    */
+    private int pduLength;
+    private String sourceId;
+    private String startLspId;
+    private String endLspId;
+    private List<IsisTlv> variableLengths = new ArrayList<>();
+
+    /**
+     * Creates the instance for this class.
+     *
+     * @param isisHeader ISIS header
+     */
+    public Csnp(IsisHeader isisHeader) {
+        populateHeader(isisHeader);
+    }
+
+    /**
+     * Returns the list of all tlvs.
+     *
+     * @return variableLengths list of tlvs
+     */
+    public List<IsisTlv> getAllTlv() {
+        return variableLengths;
+    }
+
+    /**
+     * Returns the source ID of csnp.
+     *
+     * @return sourceId source ID
+     */
+    public String sourceId() {
+        return sourceId;
+    }
+
+    /**
+     * Sets the source ID for csnp.
+     *
+     * @param sourceId source ID
+     */
+    public void setSourceId(String sourceId) {
+        this.sourceId = sourceId;
+    }
+
+    /**
+     * Returns the initial link state packet ID of csnp.
+     *
+     * @return startLspId start link state packet ID
+     */
+    public String startLspId() {
+        return startLspId;
+    }
+
+    /**
+     * Sets the initial link state packet ID for csnp.
+     *
+     * @param startLspId start link state packet ID
+     */
+    public void setStartLspId(String startLspId) {
+        this.startLspId = startLspId;
+    }
+
+    /**
+     * Returns the end link state packet ID of csnp.
+     *
+     * @return endLspId end link state packet ID of csnp.
+     */
+    public String endLspId() {
+        return endLspId;
+    }
+
+    /**
+     * Sets the end link state packet ID for csnp.
+     *
+     * @param endLspId end link state packet ID of csnp.
+     */
+    public void setEndLspId(String endLspId) {
+        this.endLspId = endLspId;
+    }
+
+    /**
+     * Returns the packet data unit length of link state packet.
+     * Entire length of this PDU, in octets
+     *
+     * @return pduLength packet date unit length
+     */
+    public int pduLength() {
+        return pduLength;
+    }
+
+    /**
+     * Sets the packet data unit length for link state packet.
+     * Entire Length of this PDU, in octets
+     *
+     * @param pduLength packet data length
+     */
+    public void setPduLength(int pduLength) {
+        this.pduLength = pduLength;
+    }
+
+    @Override
+    public void readFrom(ChannelBuffer channelBuffer) {
+        this.setPduLength(channelBuffer.readUnsignedShort());
+        //source id + 1 value
+        byte[] tempByteArray = new byte[IsisUtil.ID_PLUS_ONE_BYTE];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_PLUS_ONE_BYTE);
+        this.setSourceId(IsisUtil.systemIdPlus(tempByteArray));
+        //start lsp id + 2 value
+        tempByteArray = new byte[IsisUtil.ID_PLUS_TWO_BYTE];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_PLUS_TWO_BYTE);
+        this.setStartLspId(IsisUtil.systemIdPlus(tempByteArray));
+        //end lsp id + 2 value
+        tempByteArray = new byte[IsisUtil.ID_PLUS_TWO_BYTE];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_PLUS_TWO_BYTE);
+        this.setEndLspId(IsisUtil.systemIdPlus(tempByteArray));
+        //tlv here
+        while (channelBuffer.readableBytes() > 0) {
+            TlvHeader tlvHeader = new TlvHeader();
+            tlvHeader.setTlvType(channelBuffer.readUnsignedByte());
+            tlvHeader.setTlvLength(channelBuffer.readUnsignedByte());
+            TlvType tlvValue = TlvType.get(tlvHeader.tlvType());
+            if (tlvValue != null) {
+                IsisTlv tlv = TlvFinder.findTlv(tlvHeader, channelBuffer.readBytes(tlvHeader.tlvLength()));
+                this.variableLengths.add(tlv);
+            } else {
+                channelBuffer.readBytes(tlvHeader.tlvLength());
+            }
+        }
+    }
+
+    @Override
+    public byte[] asBytes() {
+        byte[] csnpMessage = null;
+        byte[] isisPduHeader = isisPduHeader();
+        byte[] csnpBody = completeSequenceNumberPduBody();
+        csnpMessage = Bytes.concat(isisPduHeader, csnpBody);
+        return csnpMessage;
+    }
+
+    /**
+     * Builds ISIS PDU header for complete sequence numbers PDU.
+     *
+     * @return isisPduHeader ISIS PDU header
+     */
+    public byte[] isisPduHeader() {
+        List<Byte> headerList = new ArrayList<>();
+        headerList.add(this.irpDiscriminator());
+        headerList.add((byte) IsisUtil.getPduHeaderLength(this.pduType()));
+        headerList.add(this.version());
+        headerList.add(this.idLength());
+        headerList.add((byte) this.pduType());
+        headerList.add(this.version2());
+        headerList.add(this.reserved());
+        headerList.add(this.maximumAreaAddresses());
+        return Bytes.toArray(headerList);
+    }
+
+    /**
+     * Builds complete sequence numbers PDU body.
+     *
+     * @return bodyList complete sequence numbers PDU body
+     */
+    public byte[] completeSequenceNumberPduBody() {
+        List<Byte> bodyList = new ArrayList<>();
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.pduLength())));
+        bodyList.addAll(IsisUtil.sourceAndLanIdToBytes(this.sourceId()));
+        bodyList.addAll(IsisUtil.sourceAndLanIdToBytes(this.startLspId()));
+        bodyList.addAll(IsisUtil.sourceAndLanIdToBytes(this.endLspId()));
+        for (IsisTlv isisTlv : variableLengths) {
+            bodyList.addAll(TlvsToBytes.tlvToBytes(isisTlv));
+        }
+        return Bytes.toArray(bodyList);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("pduLength", pduLength)
+                .add("sourceId", sourceId)
+                .add("startLspId", startLspId)
+                .add("endLspId", endLspId)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Csnp that = (Csnp) o;
+        return Objects.equal(pduLength, that.pduLength) &&
+                Objects.equal(sourceId, that.sourceId) &&
+                Objects.equal(startLspId, that.startLspId) &&
+                Objects.equal(endLspId, that.endLspId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(pduLength, sourceId, startLspId, endLspId);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/HelloPdu.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/HelloPdu.java
new file mode 100644
index 0000000..6ce37c8
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/HelloPdu.java
@@ -0,0 +1,220 @@
+/*
+ * Copyright 2016-present 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.isis.io.isispacket.pdu;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.MacAddress;
+import org.onosproject.isis.controller.IsisInterfaceState;
+import org.onosproject.isis.io.isispacket.IsisHeader;
+import org.onosproject.isis.io.isispacket.tlv.AdjacencyStateTlv;
+import org.onosproject.isis.io.isispacket.tlv.AreaAddressTlv;
+import org.onosproject.isis.io.isispacket.tlv.IpInterfaceAddressTlv;
+import org.onosproject.isis.io.isispacket.tlv.IsisNeighborTlv;
+import org.onosproject.isis.io.isispacket.tlv.IsisTlv;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of ISIS hello PDU.
+ */
+public abstract class HelloPdu extends IsisHeader {
+
+    protected List<IsisTlv> variableLengths = new ArrayList<>();
+    private byte circuitType;
+    private String sourceId;
+    private int holdingTime;
+    private int pduLength;
+
+    public void addTlv(IsisTlv isisTlv) {
+        variableLengths.add(isisTlv);
+    }
+
+    /**
+     * Returns the variable lengths.
+     *
+     * @return variable lengths
+     */
+    public List<IsisTlv> tlvs() {
+        return variableLengths;
+    }
+
+    /**
+     * Returns the list of area addresses.
+     *
+     * @return areaAddresses area addresses
+     */
+    public List<String> areaAddress() {
+        List<String> areaAddresses = null;
+        for (IsisTlv tlv : tlvs()) {
+            if (tlv instanceof AreaAddressTlv) {
+                areaAddresses = ((AreaAddressTlv) tlv).areaAddress();
+            }
+        }
+        return areaAddresses;
+    }
+
+    /**
+     * Returns the list of interface IP addresses.
+     *
+     * @return interfaceIpAddresses list of interface IP addresses
+     */
+    public List<Ip4Address> interfaceIpAddresses() {
+        List<Ip4Address> interfaceIpAddresses = null;
+        for (IsisTlv tlv : tlvs()) {
+            if (tlv instanceof IpInterfaceAddressTlv) {
+                interfaceIpAddresses = ((IpInterfaceAddressTlv) tlv).interfaceAddress();
+            }
+        }
+        return interfaceIpAddresses;
+    }
+
+    /**
+     * Returns the list of neighbor list.
+     *
+     * @return macAddresses list of neighbor MAC address
+     */
+    public List<MacAddress> neighborList() {
+        List<MacAddress> macAddresses = null;
+        for (IsisTlv tlv : tlvs()) {
+            if (tlv instanceof IsisNeighborTlv) {
+                macAddresses = ((IsisNeighborTlv) tlv).neighbor();
+            }
+        }
+        return macAddresses;
+    }
+
+    /**
+     * Returns the adjacency state.
+     *
+     * @return interfaceState adjacency state
+     */
+    public IsisInterfaceState adjacencyState() {
+        IsisInterfaceState interfaceState = null;
+        for (IsisTlv tlv : tlvs()) {
+            if (tlv instanceof AdjacencyStateTlv) {
+                interfaceState = IsisInterfaceState.get(((AdjacencyStateTlv) tlv).adjacencyType());
+                break;
+            }
+        }
+        return interfaceState;
+    }
+
+    /**
+     * Returns the source ID.
+     *
+     * @return sourceId source ID
+     */
+    public String sourceId() {
+        return sourceId;
+    }
+
+    /**
+     * Sets source ID.
+     *
+     * @param sourceId source ID
+     */
+    public void setSourceId(String sourceId) {
+        this.sourceId = sourceId;
+    }
+
+    /**
+     * Returns the PDU length.
+     *
+     * @return pduLength PDU length
+     */
+    public int pduLength() {
+        return pduLength;
+    }
+
+    /**
+     * Sets the PDU length.
+     *
+     * @param pduLength PDU lenght
+     */
+    public void setPduLength(int pduLength) {
+        this.pduLength = pduLength;
+    }
+
+    /**
+     * Returns the holding time.
+     *
+     * @return holdingTime holding time
+     */
+    public int holdingTime() {
+        return holdingTime;
+    }
+
+    /**
+     * Sets the holding time.
+     *
+     * @param holdingTime holding time
+     */
+    public void setHoldingTime(int holdingTime) {
+        this.holdingTime = holdingTime;
+    }
+
+    /**
+     * Returns the circuit type.
+     *
+     * @return circuitType circuit type
+     */
+    public byte circuitType() {
+        return circuitType;
+    }
+
+    /**
+     * Sets the circuit type.
+     *
+     * @param circuitType circuit type
+     */
+    public void setCircuitType(byte circuitType) {
+        this.circuitType = circuitType;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("circuitType", circuitType)
+                .add("sourceId", sourceId)
+                .add("holdingTime", holdingTime)
+                .add("pduLength", pduLength)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        HelloPdu that = (HelloPdu) o;
+        return Objects.equal(circuitType, that.circuitType) &&
+                Objects.equal(sourceId, that.sourceId) &&
+                Objects.equal(holdingTime, that.holdingTime) &&
+                Objects.equal(pduLength, that.pduLength);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(circuitType, sourceId, holdingTime, pduLength);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/L1L2HelloPdu.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/L1L2HelloPdu.java
new file mode 100644
index 0000000..9737e1a
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/L1L2HelloPdu.java
@@ -0,0 +1,228 @@
+/*
+ * Copyright 2016-present 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.isis.io.isispacket.pdu;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import com.google.common.primitives.Bytes;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.isis.io.isispacket.IsisHeader;
+import org.onosproject.isis.io.isispacket.tlv.IsisTlv;
+import org.onosproject.isis.io.isispacket.tlv.TlvFinder;
+import org.onosproject.isis.io.isispacket.tlv.TlvHeader;
+import org.onosproject.isis.io.isispacket.tlv.TlvType;
+import org.onosproject.isis.io.isispacket.tlv.TlvsToBytes;
+import org.onosproject.isis.io.util.IsisUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of L1L2 hello PDU.
+ */
+public class L1L2HelloPdu extends HelloPdu {
+
+    /*
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |             Intra-domain Routing Protocol  Discriminator       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Length Indicator                     |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           Version/Protocol ID Extension       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           ID Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |     R     |     R     |    R      |       PDU Type            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                             Version                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                             Reserved                          |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                     Maximum area address                      |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Circuit Type                         |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Source ID                            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Holding Time                         |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          PDU Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          PDU Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |    R     |                   Priority                         |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                             LAN ID                            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                      Variable Lengths Fields                  |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+        Hello Message Format
+        REFERENCE : ISO/IEC 10589
+    */
+
+    private byte priority;
+    private String lanId;
+
+    /**
+     * Parametrized constructor.
+     *
+     * @param isisHeader ISIs header
+     */
+    public L1L2HelloPdu(IsisHeader isisHeader) {
+        populateHeader(isisHeader);
+    }
+
+    /**
+     * Returns the LAN ID.
+     *
+     * @return LAN ID
+     */
+
+    public String lanId() {
+        return lanId;
+    }
+
+    /**
+     * Sets the LAN ID.
+     *
+     * @param lanId LAN ID
+     */
+    public void setLanId(String lanId) {
+        this.lanId = lanId;
+    }
+
+    /**
+     * Returns the priority.
+     *
+     * @return priority
+     */
+    public byte priority() {
+        return priority;
+    }
+
+    /**
+     * Sets priority.
+     *
+     * @param priority priority
+     */
+    public void setPriority(byte priority) {
+        this.priority = priority;
+    }
+
+    @Override
+    public void readFrom(ChannelBuffer channelBuffer) {
+        this.setCircuitType(channelBuffer.readByte());
+        //sorce id
+        byte[] tempByteArray = new byte[IsisUtil.ID_SIX_BYTES];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_SIX_BYTES);
+        this.setSourceId(IsisUtil.systemId(tempByteArray));
+        this.setHoldingTime(channelBuffer.readUnsignedShort());
+        this.setPduLength(channelBuffer.readUnsignedShort());
+        this.setPriority(channelBuffer.readByte());
+        //landid  id + 1 value
+        tempByteArray = new byte[IsisUtil.ID_PLUS_ONE_BYTE];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_PLUS_ONE_BYTE);
+        this.setLanId(IsisUtil.systemIdPlus(tempByteArray));
+        //tlv here
+        while (channelBuffer.readableBytes() > 0) {
+            TlvHeader tlvHeader = new TlvHeader();
+            tlvHeader.setTlvType(channelBuffer.readUnsignedByte());
+            tlvHeader.setTlvLength(channelBuffer.readUnsignedByte());
+            TlvType tlvType = TlvType.get(tlvHeader.tlvType());
+            if (tlvType != null) {
+                IsisTlv tlv = TlvFinder.findTlv(tlvHeader, channelBuffer.readBytes(tlvHeader.tlvLength()));
+                this.variableLengths.add(tlv);
+            } else {
+                channelBuffer.readBytes(tlvHeader.tlvLength());
+            }
+        }
+    }
+
+    @Override
+    public byte[] asBytes() {
+        byte[] helloMessage = null;
+        byte[] helloHeader = l1l2IsisPduHeader();
+        byte[] helloBody = l1l2HelloPduBody();
+        helloMessage = Bytes.concat(helloHeader, helloBody);
+        return helloMessage;
+    }
+
+    /**
+     * Parse the ISIS L1L2 PDU header.
+     *
+     * @return ISIS L1L2 PDU header
+     */
+    public byte[] l1l2IsisPduHeader() {
+        List<Byte> headerLst = new ArrayList<>();
+        headerLst.add(this.irpDiscriminator());
+        headerLst.add((byte) IsisUtil.getPduHeaderLength(this.pduType()));
+        headerLst.add(this.version());
+        headerLst.add(this.idLength());
+        headerLst.add((byte) this.pduType());
+        headerLst.add(this.version2());
+        headerLst.add(this.reserved());
+        headerLst.add(this.maximumAreaAddresses());
+        return Bytes.toArray(headerLst);
+    }
+
+    /**
+     * Parse the ISIS L1L2 PDU body.
+     *
+     * @return ISIS L1L2 PDU body
+     */
+    public byte[] l1l2HelloPduBody() {
+        List<Byte> bodyLst = new ArrayList<>();
+
+        bodyLst.add(this.circuitType());
+        bodyLst.addAll(IsisUtil.sourceAndLanIdToBytes(this.sourceId()));
+        bodyLst.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.holdingTime())));
+        bodyLst.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.pduLength())));
+        bodyLst.add(this.priority);
+        bodyLst.addAll(IsisUtil.sourceAndLanIdToBytes(this.lanId()));
+        for (IsisTlv isisTlv : variableLengths) {
+            bodyLst.addAll(TlvsToBytes.tlvToBytes(isisTlv));
+        }
+        return Bytes.toArray(bodyLst);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("priority", priority)
+                .add("lanId", lanId)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        L1L2HelloPdu that = (L1L2HelloPdu) o;
+        return Objects.equal(priority, that.priority) &&
+                Objects.equal(lanId, that.lanId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(priority, lanId);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/LsPdu.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/LsPdu.java
new file mode 100644
index 0000000..11de4f4
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/LsPdu.java
@@ -0,0 +1,486 @@
+/*
+ * Copyright 2016-present 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.isis.io.isispacket.pdu;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import com.google.common.primitives.Bytes;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.isis.io.isispacket.IsisHeader;
+import org.onosproject.isis.io.isispacket.tlv.IsisTlv;
+import org.onosproject.isis.io.isispacket.tlv.TlvFinder;
+import org.onosproject.isis.io.isispacket.tlv.TlvHeader;
+import org.onosproject.isis.io.isispacket.tlv.TlvType;
+import org.onosproject.isis.io.isispacket.tlv.TlvsToBytes;
+import org.onosproject.isis.io.util.IsisUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of an ISIS Link State packet.
+ * Each Link State packet carries a collection of TLVs
+ * Several TLVs may be included in a single packet.
+ */
+public class LsPdu extends IsisHeader {
+
+    /*
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |             Intra-domain Routing Protocol  Discriminator      |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Length Indicator                     |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           Version/Protocol ID Extension       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           ID Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |     R     |     R     |    R      |       PDU Type            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Version                              |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Reserved                             |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                     Maximum area address                      |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          PDU Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                       Remaining Lifetime                      |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          LSP ID                               |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          PDU Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                        Sequence Number                        |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                        Checksum                               |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |   P     |   ATT   |     LSPDBOL         |       IS Type       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                      Variable Lengths Fields                  |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+        LS PDU Format
+        REFERENCE : ISO/IEC 10589
+    */
+    private int pduLength;
+    private int remainingLifeTime;
+    private String lspId;
+    private int sequenceNumber;
+    private int checkSum;
+    private boolean partitionRepair;
+    private AttachedToOtherAreas attachedToOtherAreas;
+    private boolean lspDbol;
+    private byte typeBlock;
+    private byte intermediateSystemType;
+    private List<IsisTlv> variableLengths = new ArrayList<>();
+
+    /**
+     * Creates an instance of Link State packet.
+     * Parameterized constructor which populate
+     *
+     * @param isisHeader isis header details
+     */
+    public LsPdu(IsisHeader isisHeader) {
+        populateHeader(isisHeader);
+    }
+
+    /**
+     * Adds the isis tlv to the list for the link state PDU.
+     *
+     * @param isisTlv isis tlv
+     */
+    public void addTlv(IsisTlv isisTlv) {
+        variableLengths.add(isisTlv);
+    }
+
+    /**
+     * Returns the remaining time of the link state pdu.
+     * Number of seconds before LSP considered expired
+     *
+     * @return remainingTime remaining time
+     */
+    public int remainingLifeTime() {
+        return remainingLifeTime;
+    }
+
+    /**
+     * Sets the remaining time for the link state pdu.
+     *
+     * @param remainingLifeTime remaining time
+     */
+    public void setRemainingLifeTime(int remainingLifeTime) {
+        this.remainingLifeTime = remainingLifeTime;
+    }
+
+    /**
+     * Returns the link state database overload.
+     *
+     * @return lspdbol link state database overload
+     */
+    public boolean lspDbol() {
+        return lspDbol;
+    }
+
+    /**
+     * Sets the link state database overload for this pdu.
+     *
+     * @param lspDbol link state database overload
+     */
+    public void setLspDbol(boolean lspDbol) {
+        this.lspDbol = lspDbol;
+    }
+
+    /**
+     * Returns the type block.
+     *
+     * @return type block
+     */
+    public byte typeBlock() {
+        return typeBlock;
+    }
+
+    /**
+     * Sets the type block.
+     *
+     * @param typeBlock type block
+     */
+    public void setTypeBlock(byte typeBlock) {
+        this.typeBlock = typeBlock;
+    }
+
+    /**
+     * Returns the sequence number of LSP.
+     *
+     * @return sequenceNumber sequence number
+     */
+    public int sequenceNumber() {
+        return sequenceNumber;
+    }
+
+    /**
+     * Sets the sequence nubmer for LSP.
+     *
+     * @param sequenceNumber sequence number
+     */
+    public void setSequenceNumber(int sequenceNumber) {
+        this.sequenceNumber = sequenceNumber;
+    }
+
+    /**
+     * Returns the checksum of LSP from Source ID to end.
+     *
+     * @return checkSum check sum
+     */
+    public int checkSum() {
+        return checkSum;
+    }
+
+    /**
+     * Sets the checksum for LSP from Source ID to end.
+     *
+     * @param checkSum check sum
+     */
+    public void setCheckSum(int checkSum) {
+        this.checkSum = checkSum;
+    }
+
+    /**
+     * Returns the partition repair value of the intermediate system.
+     *
+     * @return partitionRepair partition repair
+     */
+    public boolean partitionRepair() {
+        return partitionRepair;
+    }
+
+    /**
+     * Sets partition repair value for the intermediate system.
+     *
+     * @param partitionRepair partition repair
+     */
+    public void setPartitionRepair(boolean partitionRepair) {
+        this.partitionRepair = partitionRepair;
+    }
+
+    /**
+     * Returns the value of intermediate system attached field.
+     * return values based on type Default Metric, Delay Metric, Expense Metric, Error Metric
+     *
+     * @return attachedToOtherAreas attached to other areas
+     */
+    public AttachedToOtherAreas attachedToOtherAreas() {
+        return attachedToOtherAreas;
+    }
+
+    /**
+     * Sets the value for intermediate system attached field.
+     * it will pass values based on type Default Metric, Delay Metric, Expense Metric, Error Metric
+     *
+     * @param attachedToOtherAreas attached to other areas
+     */
+    public void setAttachedToOtherAreas(AttachedToOtherAreas attachedToOtherAreas) {
+        this.attachedToOtherAreas = attachedToOtherAreas;
+    }
+
+    /**
+     * Returns the intermediate system type.
+     * type will be level 1 or level 2
+     *
+     * @return intermediateSystemType intermediate system type
+     */
+    public byte intermediateSystemType() {
+        return intermediateSystemType;
+    }
+
+    /**
+     * Sets the value for intermediate system.
+     * type will be level 1 or level 2
+     *
+     * @param intermediateSystemType intermediate system type
+     */
+    public void setIntermediateSystemType(byte intermediateSystemType) {
+        this.intermediateSystemType = intermediateSystemType;
+    }
+
+    /**
+     * Returns the link state ID of link state packet.
+     * System ID of the source of link state PDU
+     *
+     * @return lspId link state packet ID
+     */
+    public String lspId() {
+        return lspId;
+    }
+
+    /**
+     * Sets the link state ID for link state packet.
+     * System ID of the source of link state PDU
+     *
+     * @param lspId link state packet ID
+     */
+    public void setLspId(String lspId) {
+        this.lspId = lspId;
+    }
+
+    /**
+     * Returns the packet data unit length of link state packet.
+     * Entire length of this PDU, in octets
+     *
+     * @return pduLength packte date unit length
+     */
+    public int pduLength() {
+        return pduLength;
+    }
+
+    /**
+     * Sets the packet data unit length for link state packet.
+     * Entire Length of this PDU, in octets
+     *
+     * @param pduLength packte data length
+     */
+    public void setPduLength(int pduLength) {
+        this.pduLength = pduLength;
+    }
+
+    @Override
+    public void readFrom(ChannelBuffer channelBuffer) {
+
+        this.setPduLength(channelBuffer.readUnsignedShort());
+        this.setRemainingLifeTime(channelBuffer.readUnsignedShort());
+        //lsp id + 2 value
+        byte[] tempByteArray = new byte[IsisUtil.ID_PLUS_TWO_BYTE];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_PLUS_TWO_BYTE);
+        this.setLspId(IsisUtil.systemIdPlus(tempByteArray));
+        //sequence number 4
+        this.setSequenceNumber(channelBuffer.readInt());
+        this.setCheckSum(channelBuffer.readUnsignedShort());
+        int typeTemp = channelBuffer.readUnsignedByte();
+        byte isTypeByte = (byte) typeTemp;
+        String tempValue = String.format("%8s", Integer.toBinaryString(isTypeByte & 0xFF)).replace(' ', '0');
+        int pBit = Integer.parseInt(new Character(tempValue.charAt(0)).toString());
+        if (pBit == 1) {
+            this.setPartitionRepair(true);
+        } else {
+            this.setPartitionRepair(false);
+        }
+        int attValue = Integer.parseInt(tempValue.substring(1, 5), 2);
+        switch (AttachedToOtherAreas.get(attValue)) {
+            case DEFAULTMETRIC:
+                this.setAttachedToOtherAreas(AttachedToOtherAreas.DEFAULTMETRIC);
+                break;
+            case DELAYMETRIC:
+                this.setAttachedToOtherAreas(AttachedToOtherAreas.DELAYMETRIC);
+                break;
+            case EXPENSEMETRIC:
+                this.setAttachedToOtherAreas(AttachedToOtherAreas.EXPENSEMETRIC);
+                break;
+            case ERRORMETRIC:
+                this.setAttachedToOtherAreas(AttachedToOtherAreas.ERRORMETRIC);
+                break;
+            case NONE:
+                this.setAttachedToOtherAreas(AttachedToOtherAreas.NONE);
+                break;
+            default:
+                break;
+        }
+        int lspdbol = Integer.parseInt(new Character(tempValue.charAt(5)).toString());
+        if (lspdbol == 1) {
+            this.setLspDbol(true);
+        } else {
+            this.setLspDbol(false);
+        }
+        int isType = Integer.parseInt(tempValue.substring(6, 8), 2);
+        byte isTypeByteValue = (byte) isType;
+        this.setIntermediateSystemType(isTypeByteValue);
+        //tlv here
+        while (channelBuffer.readableBytes() > 0) {
+            TlvHeader tlvHeader = new TlvHeader();
+            tlvHeader.setTlvType(channelBuffer.readUnsignedByte());
+            tlvHeader.setTlvLength(channelBuffer.readUnsignedByte());
+            TlvType tlvValue = TlvType.get(tlvHeader.tlvType());
+            if (tlvValue != null) {
+                IsisTlv tlv = TlvFinder.findTlv(tlvHeader, channelBuffer.readBytes(tlvHeader.tlvLength()));
+                this.variableLengths.add(tlv);
+            } else {
+                channelBuffer.readBytes(tlvHeader.tlvLength());
+            }
+        }
+    }
+
+    @Override
+    public byte[] asBytes() {
+        byte[] lspMessage = null;
+        byte[] helloHeader = l1l2IsisPduHeader();
+        byte[] lspBody = l1l2LsPduBody();
+        lspMessage = Bytes.concat(helloHeader, lspBody);
+        return lspMessage;
+    }
+
+    /**
+     * Builds ISIS PDU header from ISIS message.
+     *
+     * @return headerList ISIS PDU header
+     */
+    public byte[] l1l2IsisPduHeader() {
+        List<Byte> headerList = new ArrayList<>();
+        headerList.add(this.irpDiscriminator());
+        headerList.add((byte) IsisUtil.getPduHeaderLength(this.pduType()));
+        headerList.add(this.version());
+        headerList.add(this.idLength());
+        headerList.add((byte) this.pduType());
+        headerList.add(this.version2());
+        headerList.add(this.reserved());
+        headerList.add(this.maximumAreaAddresses());
+        return Bytes.toArray(headerList);
+    }
+
+    /**
+     * Builds link state PDU body from ISIS message.
+     *
+     * @return bodyList link state PDU body
+     */
+    public byte[] l1l2LsPduBody() {
+        List<Byte> bodyList = new ArrayList<>();
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.pduLength())));
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.remainingLifeTime())));
+        bodyList.addAll(IsisUtil.sourceAndLanIdToBytes(this.lspId()));
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToFourBytes(this.sequenceNumber())));
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.checkSum())));
+        String temString = "";
+        if (this.partitionRepair()) {
+            temString = "1" + temString;
+        } else {
+            temString = "0" + temString;
+        }
+        switch (this.attachedToOtherAreas()) {
+            case ERRORMETRIC:
+                temString = temString + "1000";
+                break;
+            case EXPENSEMETRIC:
+                temString = temString + "0100";
+                break;
+            case DELAYMETRIC:
+                temString = temString + "0010";
+                break;
+            case DEFAULTMETRIC:
+                temString = temString + "0001";
+                break;
+            case NONE:
+                temString = temString + "0000";
+                break;
+            default:
+                break;
+        }
+        if (this.lspDbol()) {
+            temString = temString + "1";
+        } else {
+            temString = temString + "0";
+        }
+        String isType = Integer.toBinaryString(this.intermediateSystemType());
+        if (isType.length() % 2 != 0) {
+            isType = "0" + isType;
+        }
+        temString = temString + isType;
+        bodyList.add((byte) Integer.parseInt(temString, 2));
+        for (IsisTlv isisTlv : variableLengths) {
+            bodyList.addAll(TlvsToBytes.tlvToBytes(isisTlv));
+        }
+        return Bytes.toArray(bodyList);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("pduLength", pduLength)
+                .add("remainingLifeTime", remainingLifeTime)
+                .add("lspId", lspId)
+                .add("sequenceNumber", sequenceNumber)
+                .add("checkSum", checkSum)
+                .add("partitionRepair", partitionRepair)
+                .add("lspDbol", lspDbol)
+                .add("typeBlock", typeBlock)
+                .add("intermediateSystemType", intermediateSystemType)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        LsPdu that = (LsPdu) o;
+        return Objects.equal(pduLength, that.pduLength) &&
+                Objects.equal(remainingLifeTime, that.remainingLifeTime) &&
+                Objects.equal(lspId, that.lspId) &&
+                Objects.equal(sequenceNumber, that.sequenceNumber) &&
+                Objects.equal(checkSum, that.checkSum) &&
+                Objects.equal(partitionRepair, that.partitionRepair) &&
+                Objects.equal(lspDbol, that.lspDbol) &&
+                Objects.equal(typeBlock, that.typeBlock) &&
+                Objects.equal(intermediateSystemType, that.intermediateSystemType);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(pduLength, remainingLifeTime, lspId, sequenceNumber,
+                                checkSum, partitionRepair, lspDbol, typeBlock, intermediateSystemType);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/P2PHelloPdu.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/P2PHelloPdu.java
new file mode 100644
index 0000000..e236610
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/P2PHelloPdu.java
@@ -0,0 +1,203 @@
+/*
+ * Copyright 2016-present 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.isis.io.isispacket.pdu;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import com.google.common.primitives.Bytes;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.isis.io.isispacket.IsisHeader;
+import org.onosproject.isis.io.isispacket.tlv.IsisTlv;
+import org.onosproject.isis.io.isispacket.tlv.TlvFinder;
+import org.onosproject.isis.io.isispacket.tlv.TlvHeader;
+import org.onosproject.isis.io.isispacket.tlv.TlvType;
+import org.onosproject.isis.io.isispacket.tlv.TlvsToBytes;
+import org.onosproject.isis.io.util.IsisUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of P2P hello.
+ */
+public class P2PHelloPdu extends HelloPdu {
+    /*
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |             Intra-domain Routing Protocol  Discriminator       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Length Indicator                     |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           Version/Protocol ID Extension       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           ID Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |     R     |     R     |    R      |       PDU Type            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                             Version                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                             Reserved                          |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                     Maximum area address                      |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Circuit Type                         |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Source ID                            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Holding Time                         |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          PDU Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                        Local Circuit Id                       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                      Variable Lengths Fields                  |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+        P2P Hello Message Format
+        REFERENCE : ISO/IEC 10589
+    */
+    private byte localCircuitId;
+
+    /**
+     * Sets the ISIS header.
+     *
+     * @param isisHeader isisHeader
+     */
+    public P2PHelloPdu(IsisHeader isisHeader) {
+        populateHeader(isisHeader);
+    }
+
+    /**
+     * Returns the local circuit ID.
+     *
+     * @return Local circuit ID
+     */
+    public byte localCircuitId() {
+        return localCircuitId;
+    }
+
+    /**
+     * Sets the local circuit ID.
+     *
+     * @param localCircuitId Local circuit ID
+     */
+    public void setLocalCircuitId(byte localCircuitId) {
+        this.localCircuitId = localCircuitId;
+    }
+
+    /**
+     * Sets the variable lengths.
+     *
+     * @param variableLengths variable lengths.
+     */
+    public void setVariableLengths(List<IsisTlv> variableLengths) {
+        this.variableLengths = variableLengths;
+    }
+
+
+    @Override
+    public void readFrom(ChannelBuffer channelBuffer) {
+        this.setCircuitType(channelBuffer.readByte());
+        //source id
+        byte[] tempByteArray = new byte[IsisUtil.ID_SIX_BYTES];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_SIX_BYTES);
+        this.setSourceId(IsisUtil.systemId(tempByteArray));
+        this.setHoldingTime(channelBuffer.readUnsignedShort());
+        this.setPduLength(channelBuffer.readUnsignedShort());
+        this.setLocalCircuitId((byte) channelBuffer.readUnsignedByte());
+        while (channelBuffer.readableBytes() > 0) {
+            TlvHeader tlvHeader = new TlvHeader();
+            tlvHeader.setTlvType(channelBuffer.readUnsignedByte());
+            tlvHeader.setTlvLength(channelBuffer.readUnsignedByte());
+            TlvType tlvType = TlvType.get(tlvHeader.tlvType());
+            if (tlvType != null) {
+                IsisTlv tlv = TlvFinder.findTlv(tlvHeader, channelBuffer.readBytes(tlvHeader.tlvLength()));
+                this.variableLengths.add(tlv);
+            } else {
+                channelBuffer.readBytes(tlvHeader.tlvLength());
+            }
+        }
+    }
+
+    @Override
+    public byte[] asBytes() {
+        byte[] helloMessage = null;
+        byte[] helloHeader = p2PHeader();
+        byte[] helloBody = p2P2HelloPduBody();
+        helloMessage = Bytes.concat(helloHeader, helloBody);
+        return helloMessage;
+    }
+
+    /**
+     * Builds the point to point header.
+     *
+     * @return headerList point to point header
+     */
+    public byte[] p2PHeader() {
+        List<Byte> headerList = new ArrayList<>();
+        headerList.add(this.irpDiscriminator());
+        headerList.add((byte) IsisUtil.getPduHeaderLength(this.pduType()));
+        headerList.add(this.version());
+        headerList.add(this.idLength());
+        headerList.add((byte) this.pduType());
+        headerList.add(this.version2());
+        headerList.add(this.reserved());
+        headerList.add(this.maximumAreaAddresses());
+        return Bytes.toArray(headerList);
+    }
+
+    /**
+     * Builds the point to point hello PDU body.
+     *
+     * @return bodyList point to point hello PDU body
+     */
+    public byte[] p2P2HelloPduBody() {
+        List<Byte> bodyList = new ArrayList<>();
+        bodyList.add(this.circuitType());
+        bodyList.addAll(IsisUtil.sourceAndLanIdToBytes(this.sourceId()));
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.holdingTime())));
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.pduLength())));
+        bodyList.add((byte) this.localCircuitId());
+        for (IsisTlv isisTlv : variableLengths) {
+            bodyList.addAll(TlvsToBytes.tlvToBytes(isisTlv));
+        }
+        return Bytes.toArray(bodyList);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("localCircuitId", localCircuitId)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        P2PHelloPdu that = (P2PHelloPdu) o;
+        return Objects.equal(localCircuitId, that.localCircuitId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(localCircuitId);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/Psnp.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/Psnp.java
new file mode 100644
index 0000000..6ed6a4c
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/Psnp.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright 2016-present 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.isis.io.isispacket.pdu;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+import com.google.common.primitives.Bytes;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.onosproject.isis.io.isispacket.IsisHeader;
+import org.onosproject.isis.io.isispacket.tlv.IsisTlv;
+import org.onosproject.isis.io.isispacket.tlv.TlvFinder;
+import org.onosproject.isis.io.isispacket.tlv.TlvHeader;
+import org.onosproject.isis.io.isispacket.tlv.TlvType;
+import org.onosproject.isis.io.isispacket.tlv.TlvsToBytes;
+import org.onosproject.isis.io.util.IsisUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Representation of partial sequence number PDU.
+ */
+public class Psnp extends IsisHeader {
+    /*
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |             Intradomain Routing Protocol  Discriminator       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Length Indicator                     |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           Version/Protocol ID Extension       |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                           ID Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |     R     |     R     |    R      |       PDU Type            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Version                              |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          Reserved                             |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                     Maximum area address                      |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                          PDU Length                           |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                         Source ID                             |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                       Start LSP ID                            |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                        End LSP ID                             |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+        |                      Variable Lengths Fields                  |
+        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+        Hello Message Format
+        REFERENCE : ISO/IEC 10589
+    */
+    private int pduLength;
+    private String sourceId;
+    private List<IsisTlv> variableLengths = new ArrayList<>();
+
+    /**
+     * Creates the instance for this class.
+     *
+     * @param isisHeader ISIS header
+     */
+    public Psnp(IsisHeader isisHeader) {
+        populateHeader(isisHeader);
+    }
+
+    public void addTlv(IsisTlv isisTlv) {
+        variableLengths.add(isisTlv);
+    }
+
+    /**
+     * Returns the source ID of csnp.
+     *
+     * @return sourceId source ID
+     */
+    public String sourceId() {
+        return sourceId;
+    }
+
+    /**
+     * Sets the source ID for csnp.
+     *
+     * @param sourceId source ID
+     */
+    public void setSourceId(String sourceId) {
+        this.sourceId = sourceId;
+    }
+
+    /**
+     * Returns the packet data unit length of link state packet.
+     * Entire length of this PDU, in octets
+     *
+     * @return pduLength packte date unit length
+     */
+    public int pduLength() {
+        return pduLength;
+    }
+
+    /**
+     * Sets the packet data unit length for link state packet.
+     * Entire Length of this PDU, in octets
+     *
+     * @param pduLength packte data length
+     */
+    public void setPduLength(int pduLength) {
+        this.pduLength = pduLength;
+    }
+
+    @Override
+    public void readFrom(ChannelBuffer channelBuffer) {
+        this.setPduLength(channelBuffer.readUnsignedShort());
+        //source id + 2 value
+        byte[] tempByteArray = new byte[IsisUtil.ID_PLUS_ONE_BYTE];
+        channelBuffer.readBytes(tempByteArray, 0, IsisUtil.ID_PLUS_ONE_BYTE);
+        this.setSourceId(IsisUtil.systemIdPlus(tempByteArray));
+        //tlv here
+        while (channelBuffer.readableBytes() > 0) {
+            TlvHeader tlvHeader = new TlvHeader();
+            tlvHeader.setTlvType(channelBuffer.readUnsignedByte());
+            tlvHeader.setTlvLength(channelBuffer.readUnsignedByte());
+            TlvType tlvValue = TlvType.get(tlvHeader.tlvType());
+            if (tlvValue != null) {
+                IsisTlv tlv = TlvFinder.findTlv(tlvHeader, channelBuffer.readBytes(tlvHeader.tlvLength()));
+                this.variableLengths.add(tlv);
+            } else {
+                channelBuffer.readBytes(tlvHeader.tlvLength());
+            }
+        }
+    }
+
+
+    @Override
+    public byte[] asBytes() {
+        byte[] psnpMessage = null;
+        byte[] isisPduHeader = isisPduHeader();
+        byte[] psnpBody = partialSequenceNumberPduBody();
+        psnpMessage = Bytes.concat(isisPduHeader, psnpBody);
+        return psnpMessage;
+    }
+
+    /**
+     * Builds the ISIS PDU header.
+     *
+     * @return headerList ISIS PDU header
+     */
+    public byte[] isisPduHeader() {
+        List<Byte> headerList = new ArrayList<>();
+        headerList.add(this.irpDiscriminator());
+        headerList.add((byte) IsisUtil.getPduHeaderLength(this.pduType()));
+        headerList.add(this.version());
+        headerList.add(this.idLength());
+        headerList.add((byte) this.pduType());
+        headerList.add(this.version2());
+        headerList.add(this.reserved());
+        headerList.add(this.maximumAreaAddresses());
+        return Bytes.toArray(headerList);
+    }
+
+    /**
+     * Builds the partial sequence number PDU body.
+     *
+     * @return bodyList partial sequence number PDU body
+     */
+    public byte[] partialSequenceNumberPduBody() {
+        List<Byte> bodyList = new ArrayList<>();
+        bodyList.addAll(Bytes.asList(IsisUtil.convertToTwoBytes(this.pduLength())));
+        bodyList.addAll(IsisUtil.sourceAndLanIdToBytes(this.sourceId()));
+        for (IsisTlv isisTlv : variableLengths) {
+            bodyList.addAll(TlvsToBytes.tlvToBytes(isisTlv));
+        }
+        return Bytes.toArray(bodyList);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .omitNullValues()
+                .add("pduLength", pduLength)
+                .add("sourceId", sourceId)
+                .toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Psnp that = (Psnp) o;
+        return Objects.equal(pduLength, that.pduLength);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(sourceId, pduLength);
+    }
+}
\ No newline at end of file
diff --git a/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/package-info.java b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/package-info.java
new file mode 100644
index 0000000..8493298
--- /dev/null
+++ b/protocols/isis/isisio/src/main/java/org/onosproject/isis/io/isispacket/pdu/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2016-present 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.
+ */
+
+/**
+ * Implementation of the isis protocol.
+ */
+package org.onosproject.isis.io.isispacket.pdu;
\ No newline at end of file