diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/NeighborSet.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/NeighborSet.java
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+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/NeighborSet.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.segmentrouting.grouphandler;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+
+import org.onosproject.net.DeviceId;
+
+/**
+ * Representation of a set of neighbor switch dpids along with edge node
+ * label. Meant to be used as a lookup-key in a hash-map to retrieve an
+ * ECMP-group that hashes packets to a set of ports connecting to the
+ * neighbors in this set.
+ */
+public class NeighborSet {
+    private final Set<DeviceId> neighbors;
+    private final int edgeLabel;
+    public static final int NO_EDGE_LABEL = -1;
+
+    /**
+     * Constructor with set of neighbors. Edge label is
+     * default to -1.
+     *
+     * @param neighbors set of neighbors to be part of neighbor set
+     */
+    public NeighborSet(Set<DeviceId> neighbors) {
+        checkNotNull(neighbors);
+        this.edgeLabel = NO_EDGE_LABEL;
+        this.neighbors = new HashSet<DeviceId>();
+        this.neighbors.addAll(neighbors);
+    }
+
+    /**
+     * Constructor with set of neighbors and edge label.
+     *
+     * @param neighbors set of neighbors to be part of neighbor set
+     * @param edgeLabel label to be pushed as part of group operation
+     */
+    public NeighborSet(Set<DeviceId> neighbors, int edgeLabel) {
+        checkNotNull(neighbors);
+        this.edgeLabel = edgeLabel;
+        this.neighbors = new HashSet<DeviceId>();
+        this.neighbors.addAll(neighbors);
+    }
+
+    /**
+     * Default constructor for kryo serialization.
+     */
+    public NeighborSet() {
+        this.edgeLabel = NO_EDGE_LABEL;
+        this.neighbors = new HashSet<DeviceId>();
+    }
+
+    /**
+     * Gets the neighbors part of neighbor set.
+     *
+     * @return set of neighbor identifiers
+     */
+    public Set<DeviceId> getDeviceIds() {
+        return neighbors;
+    }
+
+    /**
+     * Gets the label associated with neighbor set.
+     *
+     * @return integer
+     */
+    public int getEdgeLabel() {
+        return edgeLabel;
+    }
+
+    // The list of neighbor ids and label are used for comparison.
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof NeighborSet)) {
+            return false;
+        }
+        NeighborSet that = (NeighborSet) o;
+        return (this.neighbors.containsAll(that.neighbors) &&
+                that.neighbors.containsAll(this.neighbors) &&
+                (this.edgeLabel == that.edgeLabel));
+    }
+
+    // The list of neighbor ids and label are used for comparison.
+    @Override
+    public int hashCode() {
+        int result = 17;
+        int combinedHash = 0;
+        for (DeviceId d : neighbors) {
+            combinedHash = combinedHash + Objects.hash(d);
+        }
+        result = 31 * result + combinedHash + Objects.hash(edgeLabel);
+
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return " Neighborset Sw: " + neighbors
+                + " and Label: " + edgeLabel;
+    }
+}