diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultFlowClassifier.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultFlowClassifier.java
index 7915ce0..ce27fc7 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultFlowClassifier.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultFlowClassifier.java
@@ -15,11 +15,13 @@
  */
 package org.onosproject.vtnrsc;
 
+import static com.google.common.base.Preconditions.checkNotNull;
+
 import java.util.Objects;
+
 import org.onlab.packet.IpPrefix;
 
 import com.google.common.base.MoreObjects;
-import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
  * Provides Default flow classifier.
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortChain.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortChain.java
index 89b94b3..d2c2e2e 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortChain.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortChain.java
@@ -18,10 +18,16 @@
 import static com.google.common.base.MoreObjects.toStringHelper;
 import static com.google.common.base.Preconditions.checkNotNull;
 
+import java.util.Iterator;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
 
 /**
  * Implementation of port chain.
@@ -35,6 +41,9 @@
     private final List<PortPairGroupId> portPairGroupList;
     private final List<FlowClassifierId> flowClassifierList;
 
+    private final Map<FiveTuple, LoadBalanceId> sfcLoadBalanceIdMap = new ConcurrentHashMap<>();
+    private final Map<LoadBalanceId, List<PortPairId>> sfcLoadBalancePathMap = new ConcurrentHashMap<>();
+
     /**
      * Default constructor to create port chain.
      *
@@ -58,6 +67,23 @@
         this.flowClassifierList = flowClassifierList;
     }
 
+    /**
+     * Match for two given paths.
+     *
+     * @param path1 path of sfc
+     * @param path2 path of sfc
+     * @return true if the given path are same false otherwise
+     */
+    private boolean comparePath(List<PortPairId> path1, List<PortPairId> path2) {
+        Iterator it = path1.iterator();
+        for (PortPairId portPairId: path2) {
+            if (!portPairId.equals(it.next())) {
+                return false;
+            }
+        }
+        return true;
+    }
+
     @Override
     public PortChainId portChainId() {
         return portChainId;
@@ -89,6 +115,47 @@
     }
 
     @Override
+    public void addLoadBalancePath(FiveTuple fiveTuple, LoadBalanceId id,
+                                   List<PortPairId> path) {
+        this.sfcLoadBalanceIdMap.put(fiveTuple, id);
+        this.sfcLoadBalancePathMap.put(id, path);
+    }
+
+    @Override
+    public LoadBalanceId getLoadBalanceId(FiveTuple fiveTuple) {
+        return this.sfcLoadBalanceIdMap.get(fiveTuple);
+    }
+
+    @Override
+    public Set<FiveTuple> getLoadBalanceIdMapKeys() {
+        return ImmutableSet.copyOf(sfcLoadBalanceIdMap.keySet());
+    }
+
+    @Override
+    public List<PortPairId> getLoadBalancePath(LoadBalanceId id) {
+        return ImmutableList.copyOf(this.sfcLoadBalancePathMap.get(id));
+    }
+
+    @Override
+    public List<PortPairId> getLoadBalancePath(FiveTuple fiveTuple) {
+        return ImmutableList.copyOf(this.sfcLoadBalancePathMap.get(this.sfcLoadBalanceIdMap.get(fiveTuple)));
+    }
+
+    @Override
+    public Optional<LoadBalanceId> matchPath(List<PortPairId> path) {
+
+        LoadBalanceId id = null;
+        for (Map.Entry<LoadBalanceId, List<PortPairId>> entry : sfcLoadBalancePathMap.entrySet()) {
+            List<PortPairId> tempPath = entry.getValue();
+            if (comparePath(path, tempPath)) {
+                id = entry.getKey();
+                break;
+            }
+        }
+        return Optional.of(id);
+    }
+
+    @Override
     public int hashCode() {
         return Objects.hash(portChainId, tenantId, name, description,
                             portPairGroupList, flowClassifierList);
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortPairGroup.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortPairGroup.java
index 877cc6c..d455ff3 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortPairGroup.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/DefaultPortPairGroup.java
@@ -19,7 +19,9 @@
 import static com.google.common.base.Preconditions.checkNotNull;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
 
 import com.google.common.collect.ImmutableList;
 
@@ -33,6 +35,7 @@
     private final String name;
     private final String description;
     private final List<PortPairId> portPairList;
+    private final Map<PortPairId, Integer> portPairLoadMap;
 
     /**
      * Default constructor to create Port Pair Group.
@@ -52,6 +55,10 @@
         this.name = name;
         this.description = description;
         this.portPairList = portPairList;
+        portPairLoadMap = new ConcurrentHashMap<>();
+        for (PortPairId portPairId : portPairList) {
+            portPairLoadMap.put(portPairId, new Integer(0));
+        }
     }
 
     @Override
@@ -80,6 +87,18 @@
     }
 
     @Override
+    public void addLoad(PortPairId portPairId) {
+        int load = portPairLoadMap.get(portPairId);
+        load = load + 1;
+        portPairLoadMap.put(portPairId, new Integer(load));
+    }
+
+    @Override
+    public int getLoad(PortPairId portPairId) {
+        return portPairLoadMap.get(portPairId);
+    }
+
+    @Override
     public int hashCode() {
         return Objects.hash(portPairGroupId, tenantId, name, description,
                             portPairList);
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java
index d147eaa..ba87010 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortChain.java
@@ -16,6 +16,8 @@
 package org.onosproject.vtnrsc;
 
 import java.util.List;
+import java.util.Optional;
+import java.util.Set;
 
 /**
  * Abstraction of an entity providing Port Chain information.
@@ -70,6 +72,55 @@
     List<FlowClassifierId> flowClassifiers();
 
     /**
+     * Adds a new load balanced path.
+     *
+     * @param fiveTuple five tuple from the packet
+     * @param id load balance path identifier
+     * @param path load balanced path of list of port pairs
+     */
+    void addLoadBalancePath(FiveTuple fiveTuple, LoadBalanceId id,
+                            List<PortPairId> path);
+
+    /**
+     * Get the load balance id from five tuple.
+     *
+     * @param fiveTuple five tuple from the packet
+     * @return load balance identifier for the given packet
+     */
+    LoadBalanceId getLoadBalanceId(FiveTuple fiveTuple);
+
+    /**
+     * Get the keys set from load balanced id map.
+     *
+     * @return set of five tuple info
+     */
+    Set<FiveTuple> getLoadBalanceIdMapKeys();
+
+    /**
+     * Get the load balanced path from load balance Id.
+     *
+     * @param id load balance id.
+     * @return path containing list of port pairs
+     */
+    List<PortPairId> getLoadBalancePath(LoadBalanceId id);
+
+    /**
+     * Get the load balanced path from five tuple.
+     *
+     * @param fiveTuple five tuple from the packet
+     * @return path containing list of port pairs
+     */
+    List<PortPairId> getLoadBalancePath(FiveTuple fiveTuple);
+
+    /**
+     * Match the given path with existing load balanced paths.
+     *
+     * @param path load balanced path
+     * @return load balance id if the path matches, null otherwise.
+     */
+    Optional<LoadBalanceId> matchPath(List<PortPairId> path);
+
+    /**
      * Returns whether this port chain is an exact match to the port chain given
      * in the argument.
      * <p>
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortPairGroup.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortPairGroup.java
index f647b57..abc3349 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortPairGroup.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/PortPairGroup.java
@@ -59,6 +59,21 @@
     List<PortPairId> portPairs();
 
     /**
+     * Adds the load on the given port pair id.
+     *
+     * @param portPairId port pair id.
+     */
+    public void addLoad(PortPairId portPairId);
+
+    /**
+     * Get the load on the given port pair id.
+     *
+     * @param portPairId port pair id
+     * @return load on the given port pair id.
+     */
+    public int getLoad(PortPairId portPairId);
+
+    /**
      * Returns whether this port pair group is an exact match to the
      * port pair group given in the argument.
      * <p>
diff --git a/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortChainTest.java b/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortChainTest.java
index 27234ac..0916a68 100644
--- a/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortChainTest.java
+++ b/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortChainTest.java
@@ -15,21 +15,57 @@
  */
 package org.onosproject.vtnrsc;
 
-import java.util.LinkedList;
-import java.util.List;
-
-import org.junit.Test;
-
-import com.google.common.testing.EqualsTester;
-
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;
 import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
 
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+
+import org.junit.Test;
+import org.onlab.packet.IPv4;
+import org.onlab.packet.IpAddress;
+import org.onosproject.net.PortNumber;
+
+import com.google.common.collect.Lists;
+import com.google.common.testing.EqualsTester;
+
 /**
  * Unit tests for DefaultPortChain class.
  */
 public class DefaultPortChainTest {
+
+    final PortChainId portChainId = PortChainId.of("78888888-fc23-aeb6-f44b-56dc5e2fb3ae");
+    final TenantId tenantId = TenantId.tenantId("1");
+    final String name = "PortChain";
+    final String description = "PortChain";
+    final List<PortPairGroupId> portPairGroups = new LinkedList<PortPairGroupId>();
+    final List<FlowClassifierId> flowClassifiers = new LinkedList<FlowClassifierId>();
+
+    private PortChain getPortChain() {
+
+        portPairGroups.clear();
+        flowClassifiers.clear();
+        // create list of Port Pair Groups.
+        PortPairGroupId portPairGroupId = PortPairGroupId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3ae");
+        portPairGroups.add(portPairGroupId);
+        portPairGroupId = PortPairGroupId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3af");
+        portPairGroups.add(portPairGroupId);
+        // create list of Flow classifiers.
+        FlowClassifierId flowClassifierId = FlowClassifierId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3ae");
+        flowClassifiers.add(flowClassifierId);
+        flowClassifierId = FlowClassifierId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3af");
+        flowClassifiers.add(flowClassifierId);
+
+        DefaultPortChain.Builder portChainBuilder = new DefaultPortChain.Builder();
+        final PortChain portChain = portChainBuilder.setId(portChainId).setTenantId(tenantId).setName(name)
+                .setDescription(description).setPortPairGroups(portPairGroups).setFlowClassifiers(flowClassifiers)
+                .build();
+
+        return portChain;
+    }
+
     /**
      * Checks that the DefaultPortChain class is immutable.
      */
@@ -43,33 +79,10 @@
      */
     @Test
     public void testEquals() {
+
         // Create same two port chain objects.
-        final PortChainId portChainId = PortChainId.of("78888888-fc23-aeb6-f44b-56dc5e2fb3ae");
-        final TenantId tenantId = TenantId.tenantId("1");
-        final String name = "PortChain1";
-        final String description = "PortChain1";
-        // create list of Port Pair Groups.
-        final List<PortPairGroupId> portPairGroups = new LinkedList<PortPairGroupId>();
-        PortPairGroupId portPairGroupId = PortPairGroupId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3ae");
-        portPairGroups.add(portPairGroupId);
-        portPairGroupId = PortPairGroupId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3af");
-        portPairGroups.add(portPairGroupId);
-        // create list of Flow classifiers.
-        final List<FlowClassifierId> flowClassifiers = new LinkedList<FlowClassifierId>();
-        FlowClassifierId flowClassifierId = FlowClassifierId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3ae");
-        flowClassifiers.add(flowClassifierId);
-        flowClassifierId = FlowClassifierId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3af");
-        flowClassifiers.add(flowClassifierId);
-
-        DefaultPortChain.Builder portChainBuilder = new DefaultPortChain.Builder();
-        final PortChain portChain1 = portChainBuilder.setId(portChainId).setTenantId(tenantId).setName(name)
-                .setDescription(description).setPortPairGroups(portPairGroups).setFlowClassifiers(flowClassifiers)
-                .build();
-
-        portChainBuilder = new DefaultPortChain.Builder();
-        final PortChain samePortChain1 = portChainBuilder.setId(portChainId).setTenantId(tenantId).setName(name)
-                .setDescription(description).setPortPairGroups(portPairGroups).setFlowClassifiers(flowClassifiers)
-                .build();
+        final PortChain portChain1 = getPortChain();
+        final PortChain samePortChain1 = getPortChain();
 
         // Create different port chain object.
         final PortChainId portChainId2 = PortChainId.of("79999999-fc23-aeb6-f44b-56dc5e2fb3ae");
@@ -78,18 +91,18 @@
         final String description2 = "PortChain2";
         // create list of Port Pair Groups.
         final List<PortPairGroupId> portPairGroups2 = new LinkedList<PortPairGroupId>();
-        portPairGroupId = PortPairGroupId.of("75555555-fc23-aeb6-f44b-56dc5e2fb3ae");
+        PortPairGroupId portPairGroupId = PortPairGroupId.of("75555555-fc23-aeb6-f44b-56dc5e2fb3ae");
         portPairGroups2.add(portPairGroupId);
         portPairGroupId = PortPairGroupId.of("75555555-fc23-aeb6-f44b-56dc5e2fb3af");
         portPairGroups2.add(portPairGroupId);
         // create list of Flow classifiers.
         final List<FlowClassifierId> flowClassifiers2 = new LinkedList<FlowClassifierId>();
-        flowClassifierId = FlowClassifierId.of("76666666-fc23-aeb6-f44b-56dc5e2fb3ae");
+        FlowClassifierId flowClassifierId = FlowClassifierId.of("76666666-fc23-aeb6-f44b-56dc5e2fb3ae");
         flowClassifiers2.add(flowClassifierId);
         flowClassifierId = FlowClassifierId.of("76666666-fc23-aeb6-f44b-56dc5e2fb3af");
         flowClassifiers2.add(flowClassifierId);
 
-        portChainBuilder = new DefaultPortChain.Builder();
+        DefaultPortChain.Builder portChainBuilder = new DefaultPortChain.Builder();
         final PortChain portChain2 = portChainBuilder.setId(portChainId2).setTenantId(tenantId2).setName(name2)
                 .setDescription(description2).setPortPairGroups(portPairGroups2).setFlowClassifiers(flowClassifiers2)
                 .build();
@@ -102,27 +115,8 @@
      */
     @Test
     public void testConstruction() {
-        final PortChainId portChainId = PortChainId.of("78888888-fc23-aeb6-f44b-56dc5e2fb3ae");
-        final TenantId tenantId = TenantId.tenantId("1");
-        final String name = "PortChain";
-        final String description = "PortChain";
-        // create list of Port Pair Groups.
-        final List<PortPairGroupId> portPairGroups = new LinkedList<PortPairGroupId>();
-        PortPairGroupId portPairGroupId = PortPairGroupId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3ae");
-        portPairGroups.add(portPairGroupId);
-        portPairGroupId = PortPairGroupId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3af");
-        portPairGroups.add(portPairGroupId);
-        // create list of Flow classifiers.
-        final List<FlowClassifierId> flowClassifiers = new LinkedList<FlowClassifierId>();
-        FlowClassifierId flowClassifierId = FlowClassifierId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3ae");
-        flowClassifiers.add(flowClassifierId);
-        flowClassifierId = FlowClassifierId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3af");
-        flowClassifiers.add(flowClassifierId);
 
-        DefaultPortChain.Builder portChainBuilder = new DefaultPortChain.Builder();
-        final PortChain portChain = portChainBuilder.setId(portChainId).setTenantId(tenantId).setName(name)
-                .setDescription(description).setPortPairGroups(portPairGroups).setFlowClassifiers(flowClassifiers)
-                .build();
+        final PortChain portChain = getPortChain();
 
         assertThat(portChainId, is(portChain.portChainId()));
         assertThat(tenantId, is(portChain.tenantId()));
@@ -131,4 +125,37 @@
         assertThat(portPairGroups, is(portChain.portPairGroups()));
         assertThat(flowClassifiers, is(portChain.flowClassifiers()));
     }
+
+    /**
+     * Verifies the load balance data structures.
+     */
+    @Test
+    public void testLoadBalanceIdMap() {
+
+        final PortChain portChain = getPortChain();
+
+        final FiveTuple fiveTuple1 = DefaultFiveTuple.builder().setIpSrc(IpAddress.valueOf("1.1.1.1"))
+                .setIpDst(IpAddress.valueOf("2.2.2.2"))
+                .setPortSrc(PortNumber.portNumber(500))
+                .setPortDst(PortNumber.portNumber(1000))
+                .setProtocol(IPv4.PROTOCOL_TCP)
+                .build();
+
+        PortPairId portPairId = PortPairId.of("a4444444-4a56-2a6e-cd3a-9dee4e2ec345");
+
+        final LoadBalanceId id1 = LoadBalanceId.of((byte) 1);
+
+        List<PortPairId> tempPath = Lists.newArrayList();
+        tempPath.add(portPairId);
+
+        portChain.addLoadBalancePath(fiveTuple1, id1, tempPath);
+        Set<FiveTuple> keys = portChain.getLoadBalanceIdMapKeys();
+        List<PortPairId> path = portChain.getLoadBalancePath(fiveTuple1);
+
+        assertThat(portChain.getLoadBalancePath(fiveTuple1), is(path));
+        assertThat(portChain.getLoadBalancePath(id1), is(path));
+        assertThat(portChain.getLoadBalanceId(fiveTuple1), is(id1));
+        assertThat(keys.contains(fiveTuple1), is(true));
+        assertThat(path.contains(portPairId), is(true));
+    }
 }
diff --git a/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortPairGroupTest.java b/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortPairGroupTest.java
index 1b484e9..7d05698 100644
--- a/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortPairGroupTest.java
+++ b/apps/vtn/vtnrsc/src/test/java/org/onosproject/vtnrsc/DefaultPortPairGroupTest.java
@@ -15,6 +15,10 @@
  */
 package org.onosproject.vtnrsc;
 
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
+
 import java.util.LinkedList;
 import java.util.List;
 
@@ -22,14 +26,34 @@
 
 import com.google.common.testing.EqualsTester;
 
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.is;
-import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
-
 /**
  * Unit tests for DefaultPortPairGroup class.
  */
 public class DefaultPortPairGroupTest {
+
+    final PortPairGroupId portPairGroupId = PortPairGroupId.of("78888888-fc23-aeb6-f44b-56dc5e2fb3ae");
+    final TenantId tenantId = TenantId.tenantId("1");
+    final String name = "PortPairGroup1";
+    final String description = "PortPairGroup1";
+    final List<PortPairId> portPairList = new LinkedList<PortPairId>();
+
+    private PortPairGroup getPortPairGroup() {
+
+        portPairList.clear();
+        // Create same two port-pair-group objects.
+        PortPairId portPairId = PortPairId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3ae");
+        portPairList.add(portPairId);
+        portPairId = PortPairId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3ae");
+        portPairList.add(portPairId);
+
+        DefaultPortPairGroup.Builder portPairGroupBuilder = new DefaultPortPairGroup.Builder();
+        PortPairGroup portPairGroup = portPairGroupBuilder.setId(portPairGroupId).setTenantId(tenantId)
+                .setName(name).setDescription(description).setPortPairs(portPairList).build();
+
+        return portPairGroup;
+
+    }
+
     /**
      * Checks that the DefaultPortPairGroup class is immutable.
      */
@@ -43,25 +67,11 @@
      */
     @Test
     public void testEquals() {
-        // Create same two port-pair-group objects.
-        final PortPairGroupId portPairGroupId = PortPairGroupId.of("78888888-fc23-aeb6-f44b-56dc5e2fb3ae");
-        final TenantId tenantId = TenantId.tenantId("1");
-        final String name = "PortPairGroup1";
-        final String description = "PortPairGroup1";
-        // create port-pair-id list
-        final List<PortPairId> portPairList = new LinkedList<PortPairId>();
-        PortPairId portPairId = PortPairId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3ae");
-        portPairList.add(portPairId);
-        portPairId = PortPairId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3ae");
-        portPairList.add(portPairId);
+
+        final PortPairGroup portPairGroup1 = getPortPairGroup();
 
         DefaultPortPairGroup.Builder portPairGroupBuilder = new DefaultPortPairGroup.Builder();
-        final PortPairGroup portPairGroup1 = portPairGroupBuilder.setId(portPairGroupId).setTenantId(tenantId)
-                .setName(name).setDescription(description).setPortPairs(portPairList).build();
-
-        portPairGroupBuilder = new DefaultPortPairGroup.Builder();
-        final PortPairGroup samePortPairGroup1 = portPairGroupBuilder.setId(portPairGroupId).setTenantId(tenantId)
-                .setName(name).setDescription(description).setPortPairs(portPairList).build();
+        final PortPairGroup samePortPairGroup1 = getPortPairGroup();
 
         // Create different port-pair-group object.
         final PortPairGroupId portPairGroupId2 = PortPairGroupId.of("79999999-fc23-aeb6-f44b-56dc5e2fb3ae");
@@ -70,7 +80,7 @@
         final String description2 = "PortPairGroup2";
         // create port-pair-id list
         final List<PortPairId> portPairList2 = new LinkedList<PortPairId>();
-        portPairId = PortPairId.of("75555555-fc23-aeb6-f44b-56dc5e2fb3ae");
+        PortPairId portPairId = PortPairId.of("75555555-fc23-aeb6-f44b-56dc5e2fb3ae");
         portPairList2.add(portPairId);
         portPairId = PortPairId.of("75555555-fc23-aeb6-f44b-56dc5e2fb3ae");
         portPairList2.add(portPairId);
@@ -80,7 +90,7 @@
                 .setName(name2).setDescription(description2).setPortPairs(portPairList2).build();
 
         new EqualsTester().addEqualityGroup(portPairGroup1, samePortPairGroup1).addEqualityGroup(portPairGroup2)
-                .testEquals();
+        .testEquals();
     }
 
     /**
@@ -88,20 +98,8 @@
      */
     @Test
     public void testConstruction() {
-        final PortPairGroupId portPairGroupId = PortPairGroupId.of("78888888-fc23-aeb6-f44b-56dc5e2fb3ae");
-        final TenantId tenantId = TenantId.tenantId("1");
-        final String name = "PortPairGroup";
-        final String description = "PortPairGroup";
-        // create port-pair-id list
-        final List<PortPairId> portPairList = new LinkedList<PortPairId>();
-        PortPairId portPairId = PortPairId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3ae");
-        portPairList.add(portPairId);
-        portPairId = PortPairId.of("74444444-fc23-aeb6-f44b-56dc5e2fb3ae");
-        portPairList.add(portPairId);
 
-        DefaultPortPairGroup.Builder portPairGroupBuilder = new DefaultPortPairGroup.Builder();
-        final PortPairGroup portPairGroup = portPairGroupBuilder.setId(portPairGroupId).setTenantId(tenantId)
-                .setName(name).setDescription(description).setPortPairs(portPairList).build();
+        final PortPairGroup portPairGroup = getPortPairGroup();
 
         assertThat(portPairGroupId, is(portPairGroup.portPairGroupId()));
         assertThat(tenantId, is(portPairGroup.tenantId()));
@@ -109,4 +107,19 @@
         assertThat(description, is(portPairGroup.description()));
         assertThat(portPairList, is(portPairGroup.portPairs()));
     }
+
+    /**
+     * Checks the port pair load map.
+     */
+    @Test
+    public void testPortPairLod() {
+
+        PortPairId portPairId = PortPairId.of("73333333-fc23-aeb6-f44b-56dc5e2fb3ae");
+        final PortPairGroup portPairGroup = getPortPairGroup();
+        int load1 = portPairGroup.getLoad(portPairId);
+        portPairGroup.addLoad(portPairId);
+        int load2 = portPairGroup.getLoad(portPairId);
+
+        assertThat((load1 + 1), is(load2));
+    }
 }
diff --git a/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortChainResourceTest.java b/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortChainResourceTest.java
index a4b3be0..b172c09 100644
--- a/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortChainResourceTest.java
+++ b/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortChainResourceTest.java
@@ -30,11 +30,11 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Objects;
+import java.util.Optional;
 import java.util.Set;
 
 import javax.ws.rs.core.MediaType;
 
-import com.eclipsesource.json.Json;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -42,14 +42,18 @@
 import org.onlab.osgi.TestServiceDirectory;
 import org.onlab.rest.BaseResource;
 import org.onosproject.codec.CodecService;
+import org.onosproject.vtnrsc.FiveTuple;
 import org.onosproject.vtnrsc.FlowClassifierId;
+import org.onosproject.vtnrsc.LoadBalanceId;
 import org.onosproject.vtnrsc.PortChain;
 import org.onosproject.vtnrsc.PortChainId;
 import org.onosproject.vtnrsc.PortPairGroupId;
+import org.onosproject.vtnrsc.PortPairId;
 import org.onosproject.vtnrsc.TenantId;
 import org.onosproject.vtnrsc.portchain.PortChainService;
 import org.onosproject.vtnweb.web.SfcCodecContext;
 
+import com.eclipsesource.json.Json;
 import com.eclipsesource.json.JsonObject;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Lists;
@@ -135,6 +139,41 @@
                     Objects.equals(this.portChainId, portChain.portChainId()) &&
                     Objects.equals(this.tenantId, portChain.tenantId());
         }
+
+        @Override
+        public void addLoadBalancePath(FiveTuple fiveTuple, LoadBalanceId id, List<PortPairId> path) {
+            // TODO Auto-generated method stub
+        }
+
+        @Override
+        public LoadBalanceId getLoadBalanceId(FiveTuple fiveTuple) {
+            // TODO Auto-generated method stub
+            return null;
+        }
+
+        @Override
+        public Set<FiveTuple> getLoadBalanceIdMapKeys() {
+            // TODO Auto-generated method stub
+            return null;
+        }
+
+        @Override
+        public List<PortPairId> getLoadBalancePath(LoadBalanceId id) {
+            // TODO Auto-generated method stub
+            return null;
+        }
+
+        @Override
+        public List<PortPairId> getLoadBalancePath(FiveTuple fiveTuple) {
+            // TODO Auto-generated method stub
+            return null;
+        }
+
+        @Override
+        public Optional<LoadBalanceId> matchPath(List<PortPairId> path) {
+            // TODO Auto-generated method stub
+            return null;
+        }
     }
 
     /**
diff --git a/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortPairGroupResourceTest.java b/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortPairGroupResourceTest.java
index 70335ba..9b7c987 100644
--- a/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortPairGroupResourceTest.java
+++ b/apps/vtn/vtnweb/src/test/java/org/onosproject/vtnweb/resources/PortPairGroupResourceTest.java
@@ -34,7 +34,6 @@
 
 import javax.ws.rs.core.MediaType;
 
-import com.eclipsesource.json.Json;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -49,6 +48,7 @@
 import org.onosproject.vtnrsc.portpairgroup.PortPairGroupService;
 import org.onosproject.vtnweb.web.SfcCodecContext;
 
+import com.eclipsesource.json.Json;
 import com.eclipsesource.json.JsonObject;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Lists;
@@ -122,6 +122,17 @@
                     Objects.equals(this.portPairGroupId, portPairGroup.portPairGroupId()) &&
                     Objects.equals(this.tenantId, portPairGroup.tenantId());
         }
+
+        @Override
+        public void addLoad(PortPairId portPairId) {
+            // TODO Auto-generated method stub
+        }
+
+        @Override
+        public int getLoad(PortPairId portPairId) {
+            // TODO Auto-generated method stub
+            return 0;
+        }
     }
 
     /**