diff --git a/service/notification-manager/NotificationManager/include/hosting.h b/service/notification-manager/NotificationManager/include/hosting.h
index c85eea8581cffe382a2586887a045d5fbef95494..5a18a0a0590ef1d93f6ddad9256bb5dd0f3d8ec4 100755
--- a/service/notification-manager/NotificationManager/include/hosting.h
+++ b/service/notification-manager/NotificationManager/include/hosting.h
@@ -30,7 +30,8 @@
 #include "ocstack.h"
 #include "logger.h"
 
-#define OC_TRANSPORT OC_ALL
+//#define OC_TRANSPORT OC_ALL
+#define OC_TRANSPORT OC_IPV4
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/service/notification-manager/SampleApp/linux/sampleConsumer/SampleConsumer.cpp b/service/notification-manager/SampleApp/linux/sampleConsumer/SampleConsumer.cpp
index 054465d51c4c96938e3cfa0249dcc67b169dc8e5..38a86821733f15b86ca0116cdcd4957ce2ece3f5 100755
--- a/service/notification-manager/SampleApp/linux/sampleConsumer/SampleConsumer.cpp
+++ b/service/notification-manager/SampleApp/linux/sampleConsumer/SampleConsumer.cpp
@@ -34,7 +34,7 @@ using namespace OC;
 
 const int SUCCESS_RESPONSE = OC_STACK_OK;
 
-#define OC_WELL_KNOWN_COORDINATING_QUERY "224.0.1.187:5683/oc/core?rt=Resource.Hosting"
+#define OC_WELL_KNOWN_COORDINATING_QUERY "/oc/core?rt=Resource.Hosting"
 
 #define OBSERVE 1
 #define GET     2