diff --git a/src/tsg_entry.h b/src/tsg_entry.h
index f94f989..210172b 100644
--- a/src/tsg_entry.h
+++ b/src/tsg_entry.h
@@ -280,6 +280,7 @@ typedef	struct tsg_para
 	int app_dict_field_num;
 	int device_seq_in_dc;
 	int datacenter_id;
+	int hash_switch;
 	int hash_timeout;
 	int hash_slot_size;
 	int feature_tamper;
diff --git a/src/tsg_gtp_signaling.cpp b/src/tsg_gtp_signaling.cpp
index 9cfab94..d0dc79b 100644
--- a/src/tsg_gtp_signaling.cpp
+++ b/src/tsg_gtp_signaling.cpp
@@ -8,7 +8,7 @@
 #include "tsg_entry.h"
 #include "tsg_gtp_signaling.h"
 
-MESA_htable_handle g_gtp_signaling_hash_handle;
+MESA_htable_handle g_gtp_signaling_hash_handle=NULL;
 
 
 static int is_gtp_tunnel(const struct streaminfo *a_stream)
@@ -136,6 +136,11 @@ int tsg_get_umts_user_info(const struct streaminfo *a_stream, struct umts_user_i
 	int ret=0;
 	unsigned int uplink=0,downlink=0;
 
+	if(g_tsg_para.hash_switch==0)
+	{
+		return 0;
+	}
+
 	if(*user_info!=NULL)
 	{
 		return 1;
@@ -170,6 +175,13 @@ int tsg_get_umts_user_info(const struct streaminfo *a_stream, struct umts_user_i
 
 int tsg_gtp_signaling_hash_init(const char* conffile, void *logger)
 {
+	int hash_switch=0;
+	MESA_load_profile_int_def(conffile, "GTP_SIGNALING", "HASH_SWITCH", &g_tsg_para.hash_switch, 1);
+	if(g_tsg_para.hash_switch==0)
+	{
+		return 0;
+	}
+
 	MESA_htable_create_args_t args;
 
 	MESA_load_profile_int_def(conffile, "GTP_SIGNALING", "HASH_TIMEOUT", &g_tsg_para.hash_timeout, 300);