diff --git a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/ClassifierService.java b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/ClassifierService.java
index 7715b9d..fffa2fb 100644
--- a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/ClassifierService.java
+++ b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/ClassifierService.java
@@ -16,6 +16,7 @@
 package org.onosproject.vtn.table;
 
 import org.onlab.packet.IpAddress;
+import org.onlab.packet.IpPrefix;
 import org.onlab.packet.MacAddress;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.net.DeviceId;
@@ -102,4 +103,20 @@
                                    SegmentationId actionVni,
                                    Objective.Operation type);
 
+    /**
+     * Assemble the Userdata Classifier table rules.
+     * Match: subnet ip prefix and destination ip.
+     * Action: add flow rule to specific ip for userdata.
+     *
+     * @param deviceId Device Id
+     * @param ipPrefix source ip prefix
+     * @param dstIp userdata ip
+     * @param dstmac dst mac
+     * @param actionVni the vni of the source network (l2vni)
+     * @param type the operation type of the flow rules
+     */
+    void programUserdataClassifierRules(DeviceId deviceId, IpPrefix ipPrefix,
+                                        IpAddress dstIp, MacAddress dstmac,
+                                        SegmentationId actionVni,
+                                        Objective.Operation type);
 }
diff --git a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/impl/ClassifierServiceImpl.java b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/impl/ClassifierServiceImpl.java
index e60c217..030c783 100644
--- a/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/impl/ClassifierServiceImpl.java
+++ b/apps/vtn/vtnmgr/src/main/java/org/onosproject/vtn/table/impl/ClassifierServiceImpl.java
@@ -56,7 +56,7 @@
     private static final int ARP_CLASSIFIER_PRIORITY = 60000;
     private static final int L3_CLASSIFIER_PRIORITY = 0xffff;
     private static final int L2_CLASSIFIER_PRIORITY = 50000;
-
+    private static final int USERDATA_CLASSIFIER_PRIORITY = 65535;
     private final FlowObjectiveService flowObjectiveService;
     private final ApplicationId appId;
 
@@ -193,4 +193,29 @@
         }
     }
 
+    @Override
+    public void programUserdataClassifierRules(DeviceId deviceId,
+                                               IpPrefix ipPrefix,
+                                               IpAddress dstIp,
+                                               MacAddress dstmac,
+                                               SegmentationId actionVni,
+                                               Objective.Operation type) {
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthType(Ethernet.TYPE_IPV4).matchIPSrc(ipPrefix)
+                .matchIPDst(IpPrefix.valueOf(dstIp, 32)).build();
+        TrafficTreatment treatment = DefaultTrafficTreatment.builder()
+                .setTunnelId(Long.parseLong(actionVni.segmentationId()))
+                .setEthDst(dstmac).build();
+        ForwardingObjective.Builder objective = DefaultForwardingObjective
+                .builder().withTreatment(treatment).withSelector(selector)
+                .fromApp(appId).withFlag(Flag.SPECIFIC)
+                .withPriority(USERDATA_CLASSIFIER_PRIORITY);
+        if (type.equals(Objective.Operation.ADD)) {
+            log.debug("UserdataClassifierRules-->ADD");
+            flowObjectiveService.forward(deviceId, objective.add());
+        } else {
+            log.debug("UserdataClassifierRules-->REMOVE");
+            flowObjectiveService.forward(deviceId, objective.remove());
+        }
+    }
 }