diff --git a/acctonUseDpctl/mpls.py b/acctonUseDpctl/mpls.py
index f62e2bc..1f19006 100755
--- a/acctonUseDpctl/mpls.py
+++ b/acctonUseDpctl/mpls.py
@@ -722,6 +722,18 @@
         self.dataplane.send(input_port, str(input_pkt))
         verify_packet(self, str(output_pkt2), output_port2)
         apply_dpctl_mod(self, config, "port-mod port="+str(output_port)+",conf=0x0,mask=0x1")
+        time.sleep(1)
+        #make sure port link up
+        json_result = apply_dpctl_get_cmd(self, config, "port-desc")
+        result=json_result["RECEIVED"][1]
+        port_up = 0
+        while port_up == 0:
+            for p_desc in result["port"]:
+                if p_desc["no"] == output_port:
+                    if p_desc["config"] != 0x01 : #up
+                        port_up = 1 
+                        time.sleep(1)
+        
 
 
 class decap_mpls_acl(base_tests.SimpleDataPlane):