diff --git a/CustomerExample/ophylink.py b/CustomerExample/ophylink.py
new file mode 100755
index 0000000..8214275
--- /dev/null
+++ b/CustomerExample/ophylink.py
@@ -0,0 +1,53 @@
+"""
+Basic test cases
+
+Test cases in other modules depend on this functionality.
+"""
+
+import logging
+
+from oftest import config
+import oftest.base_tests as base_tests
+import ofp
+import time
+from oftest.testutils import *
+from accton_util import *
+
+class case1(base_tests.SimpleDataPlane):
+    """
+    pakcet from port 1 (tag/untag) ouptut to port 2 with vlan 10
+    """
+    def runTest(self):
+        delete_all_flows(self.controller)
+        delete_all_groups(self.controller)     
+    
+        in_port = config["port_map"].keys()[0]
+        out_port=config["port_map"].keys()[1]
+
+        add_one_vlan_table_flow(self.controller, in_port, vlan_id=1, vrf=0, flag=VLAN_TABLE_FLAG_ONLY_BOTH, send_barrier=False)
+        add_one_l2_interface_grouop(self.controller, out_port, 10,  True, False)        
+        msg=add_l2_rewrite_group(self.controller, out_port, 10, 1, None, None)        
+        
+        match = ofp.match()
+        match.oxm_list.append(ofp.oxm.in_port(in_port))
+    
+        request = ofp.message.flow_add(
+                table_id=60,
+                cookie=42,
+                match=match,
+                instructions=[
+                    ofp.instruction.write_actions(
+                        actions=[
+                            ofp.action.group(msg.group_id)])
+                    ],
+                buffer_id=ofp.OFP_NO_BUFFER,
+                priority=1000) 
+        
+        self.controller.message_send(request)
+        
+        parsed_pkt = simple_tcp_packet(pktlen=100)
+        pkt = str(parsed_pkt)
+        self.dataplane.send(in_port, pkt)
+    
+        parsed_pkt = simple_tcp_packet(pktlen=104, dl_vlan_enable=True, vlan_vid=10)
+        verify_packet(self, str(parsed_pkt), out_port)
\ No newline at end of file