diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/OpenstackNetworkingUtil.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/OpenstackNetworkingUtil.java
index 40d07f5..8837a65 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/OpenstackNetworkingUtil.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/OpenstackNetworkingUtil.java
@@ -56,6 +56,8 @@
 import org.onosproject.net.device.DeviceService;
 import org.onosproject.net.flow.DefaultTrafficTreatment;
 import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.group.DefaultGroupKey;
+import org.onosproject.net.group.GroupKey;
 import org.onosproject.net.packet.DefaultOutboundPacket;
 import org.onosproject.net.packet.PacketService;
 import org.onosproject.openstacknetworking.api.Constants.VnicType;
@@ -1321,6 +1323,16 @@
     }
 
     /**
+     * Obtains flow group key from the given id.
+     *
+     * @param groupId flow group identifier
+     * @return flow group key
+     */
+    public static GroupKey getGroupKey(int groupId) {
+        return new DefaultGroupKey((Integer.toString(groupId)).getBytes());
+    }
+
+    /**
      * Builds up and a complete endpoint URL from gateway node.
      *
      * @param node gateway node
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/RulePopulatorUtil.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/RulePopulatorUtil.java
index bc7ecba..de5295c 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/RulePopulatorUtil.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/util/RulePopulatorUtil.java
@@ -25,11 +25,15 @@
 import org.onosproject.net.device.DeviceService;
 import org.onosproject.net.driver.DriverHandler;
 import org.onosproject.net.driver.DriverService;
+import org.onosproject.net.flow.TrafficTreatment;
 import org.onosproject.net.flow.criteria.ExtensionSelector;
 import org.onosproject.net.flow.criteria.ExtensionSelectorType;
 import org.onosproject.net.flow.instructions.ExtensionPropertyException;
 import org.onosproject.net.flow.instructions.ExtensionTreatment;
 import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
+import org.onosproject.net.group.DefaultGroupBucket;
+import org.onosproject.net.group.GroupBucket;
+import org.onosproject.net.group.GroupDescription;
 import org.slf4j.Logger;
 
 import java.util.ArrayList;
@@ -226,6 +230,32 @@
     }
 
     /**
+     * Returns the group bucket with given traffic treatment and group type.
+     *
+     * @param treatment     traffic treatment
+     * @param type          group type
+     * @param weight        weight (only for select type)
+     * @return group bucket
+     */
+    public static GroupBucket buildGroupBucket(TrafficTreatment treatment,
+                                               GroupDescription.Type type, short weight) {
+        switch (type) {
+            case ALL:
+                return DefaultGroupBucket.createAllGroupBucket(treatment);
+            case SELECT:
+                if (weight == -1) {
+                    return DefaultGroupBucket.createSelectGroupBucket(treatment);
+                } else {
+                    return DefaultGroupBucket.createSelectGroupBucket(treatment, weight);
+                }
+            case INDIRECT:
+                return DefaultGroupBucket.createIndirectGroupBucket(treatment);
+            default:
+                return null;
+        }
+    }
+
+    /**
      * Returns the nicira push extension treatment.
      *
      * @param device        device instance