diff --git a/openair2/ENB_APP/enb_config.c b/openair2/ENB_APP/enb_config.c
index 9141a85d33293c55b14a0b3d514eb9398d1bcaf1..6878d00dc053d4bf678c137e45735e59ba32d2e5 100644
--- a/openair2/ENB_APP/enb_config.c
+++ b/openair2/ENB_APP/enb_config.c
@@ -162,6 +162,12 @@ void RCconfig_RU(void) {
           RC.ru[j]->eth_params.my_portd                 = *(RUParamList.paramarray[j][RU_LOCAL_PORTD_IDX].uptr);
           RC.ru[j]->eth_params.remote_portd             = *(RUParamList.paramarray[j][RU_REMOTE_PORTD_IDX].uptr);
 
+          if (strcmp(*(RUParamList.paramarray[j][RU_IS_SLAVE_IDX].strptr), "yes") == 0) {
+            RC.ru[j]->is_slave = 1;
+          }else {
+            RC.ru[j]->is_slave = 0;
+          }
+
 	  if (strcmp(*(RUParamList.paramarray[j][RU_TRANSPORT_PREFERENCE_IDX].strptr), "udp") == 0) {
 	    RC.ru[j]->if_south                        = LOCAL_RF;
 	    RC.ru[j]->function                        = NGFI_RRU_IF5;
diff --git a/openair2/ENB_APP/enb_paramdef.h b/openair2/ENB_APP/enb_paramdef.h
index 6a03687fab8917be9fdab8bd99f6da4451a1a039..b4fcc4deb1ad71eba0f6650c11ef25b5f9f89b4e 100755
--- a/openair2/ENB_APP/enb_paramdef.h
+++ b/openair2/ENB_APP/enb_paramdef.h
@@ -152,7 +152,7 @@ typedef enum {
 #define CONFIG_STRING_RU_MAX_RS_EPRE              "max_pdschReferenceSignalPower"
 #define CONFIG_STRING_RU_MAX_RXGAIN               "max_rxgain"
 #define CONFIG_STRING_RU_IF_COMPRESSION           "if_compression"
-
+#define CONFIG_STRING_RU_IS_SLAVE                 "is_slave"
 
 #define RU_LOCAL_IF_NAME_IDX          0
 #define RU_LOCAL_ADDRESS_IDX          1
@@ -171,6 +171,7 @@ typedef enum {
 #define RU_ENB_LIST_IDX               14
 #define RU_ATT_TX_IDX                 15
 #define RU_ATT_RX_IDX                 16
+#define RU_IS_SLAVE_IDX               17
 
 
 
@@ -200,7 +201,8 @@ static int DEFENBS[] = {0};
 {CONFIG_STRING_RU_BAND_LIST,                	 NULL,       0,       uptr:NULL,       defintarrayval:DEFBANDS, TYPE_INTARRAY,    1}, \
 {CONFIG_STRING_RU_ENB_LIST,                 	 NULL,       0,       uptr:NULL,       defintarrayval:DEFENBS,  TYPE_INTARRAY,    1}, \
 {CONFIG_STRING_RU_ATT_TX,                   	 NULL,       0,       uptr:NULL,       defintval:0,		TYPE_UINT,	  0}, \
-{CONFIG_STRING_RU_ATT_RX,                   	 NULL,       0,       uptr:NULL,       defintval:0,		TYPE_UINT,	  0}  \
+{CONFIG_STRING_RU_ATT_RX,                   	 NULL,       0,       uptr:NULL,       defintval:0,		TYPE_UINT,	  0}, \
+{CONFIG_STRING_RU_IS_SLAVE,                      NULL,       0,       strptr:NULL,     defstrval:"yes",         TYPE_STRING,      0}, \
 }
 
 /*---------------------------------------------------------------------------------------------------------------------------------------*/