diff --git a/df_datalink_ge/src/main.c b/df_datalink_ge/src/main.c
index a80f8c1..1e6a95e 100644
--- a/df_datalink_ge/src/main.c
+++ b/df_datalink_ge/src/main.c
@@ -77,14 +77,14 @@ struct callback_desc scutm_callback_desc = {
 	.ctx = NULL
 };
 
-static L2_CONFIG linkConfig = {
+L2_CONFIG linkConfig = {
 	.myType = L2_NODE_HEAD,
 	.clustId = 1,
 	.myId = 1,
 	.headId = 1,
 	.bkpHeadId = 0,
 	.netScale = 2,
-	.phyInstPtr = NULL, // pyhsical layer reference
+	.phyInstPtr = NULL, // physical layer reference
 	.tmcInstPtr = NULL
 };
 
@@ -124,7 +124,7 @@ static struct timer_desc *logTmPtr;
 static SYSBUS *sysbusDescPtr;
 static PHY_INST *phyInstPtr;
 static TMC_INST *tmcInstPtr = NULL;
-static L2_INST *linkInstPtr;
+L2_INST *linkInstPtr;
 
 /****************************************************************************/
 /**
diff --git a/df_datalink_sp/src/main.c b/df_datalink_sp/src/main.c
index 13f0313..b3bfd30 100644
--- a/df_datalink_sp/src/main.c
+++ b/df_datalink_sp/src/main.c
@@ -73,14 +73,14 @@ struct callback_desc scutm_callback_desc = {
 	.ctx = NULL
 };
 
-static L2_CONFIG linkConfig = {
+L2_CONFIG linkConfig = {
 	.myType = L2_NODE_HEAD,
 	.clustId = 1,
 	.myId = 1,
 	.headId = 1,
 	.bkpHeadId = 0,
 	.netScale = 2,
-	.phyInstPtr = NULL, // pyhsical layer reference
+	.phyInstPtr = NULL, // physical layer reference
 	.tmcInstPtr = NULL
 };
 
@@ -120,7 +120,7 @@ static struct timer_desc *logTmPtr;
 static SYSBUS *sysbusDescPtr;
 static PHY_INST *phyInstPtr;
 static TMC_INST *tmcInstPtr = NULL;
-static L2_INST *linkInstPtr;
+L2_INST *linkInstPtr;
 
 static struct hmc7044_dev *hmc7044_inst;
 static struct ad9361_reg_dev *ad9361_1_reg_inst;
diff --git a/df_datalink_sp/src/systembus/systembus.c b/df_datalink_sp/src/systembus/systembus.c
index 0868e07..0236a2c 100644
--- a/df_datalink_sp/src/systembus/systembus.c
+++ b/df_datalink_sp/src/systembus/systembus.c
@@ -30,6 +30,7 @@
 
 #include "../system_monitor.h"
 
+/************************** Constant Definitions *****************************/
 // Common Field
 // -- Command word
 #define WD_CMD 0x00
@@ -95,11 +96,12 @@
 #define CMD_CONFIG 0xE3
 // -- Request
 #define WD_EN_CMD 0x02
-#define EN_CMD_ON 0x66
+#define EN_CMD_ON_HIGH_POWER 0x66
+#define EN_CMD_ON_LOW_POWER 0x88
 
 #define WD_MODE_CMD 0x03
 #define MODE_CMD_HEAD 0x11
-#define MODE_CMD_MEMBER 0x11
+#define MODE_CMD_MEMBER 0x00
 // -- Response
 // -- -- none response
 
@@ -165,6 +167,15 @@
 // My Production Type
 #define MY_PRD_ID PRD_DL_K
 
+/************************** Function Prototypes ******************************/
+/**************************** Type Definitions *******************************/
+/************************** Variable Definitions *****************************/
+// TODO: better approach?
+#include "../networking/link_layer/link_layer.h"
+#include "../networking/phy_layer/phy_layer.h"
+extern L2_INST *linkInstPtr;
+extern L2_CONFIG linkConfig;
+
 inline bool SystemBus_IsReqPendding(SYSBUS *instPtr)
 {
 	ASSERT(instPtr != NULL);
@@ -337,10 +348,63 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 		break;
 	}
 	case CMD_CONFIG:
-	{
-		// FIXME: apply configurations
-		// Power + Mode
-		// -- No response
+	{	
+		PHY_INST *phyRef = linkInstPtr->config.phyInstPtr;
+		TMC_INST *tmcRef = linkInstPtr->config.tmcInstPtr;
+
+		if(data[WD_EN_CMD] == EN_CMD_ON_HIGH_POWER) 
+		{
+			// high power config
+			Phy_AntConfigMode(phyRef, PHY_ANT_MODE_HIGH_POWER);
+			Linklayer_Start(linkInstPtr);
+
+		}
+		else if(data[WD_EN_CMD] == EN_CMD_ON_LOW_POWER)
+		{
+			// low power config
+			Phy_AntConfigMode(phyRef, PHY_ANT_MODE_LOW_POWER);
+			Linklayer_Start(linkInstPtr);
+		}
+		else 
+		{
+			// silence config
+			// TODO: better approach?
+			Linklayer_Halt(linkInstPtr);
+			Phy_AntConfigMode(phyRef, PHY_ANT_MODE_SILENT);
+			TIME_WORD pullTime = {0, 0};
+			pullTime.int_part = TimeCtrl_GetIntCnt(tmcRef) + 1;
+			Status = Phy_SetTimeWord(phyRef, &pullTime, PHY_TIME_WORD_POLL);
+			if (Status != SUCCESS)
+			{
+				DBG_ERROR("Physical set pull time failed, with error code: %" PRId32 ".\n", Status);
+			}
+			Phy_SetupNextSlot(phyRef, PHY_TOR_TX, L1_10KBPS_10MS_FRAME, NULL);
+		}
+		
+		if (data[WD_MODE_CMD] == MODE_CMD_HEAD) 
+		{
+			// head node config
+			linkConfig.myType = L2_NODE_HEAD;
+			linkConfig.myId = 1;
+			Linklayer_Reconfig(linkInstPtr, &linkConfig);
+			Linklayer_Start(linkInstPtr);
+		}
+		else if (data[WD_MODE_CMD] == MODE_CMD_MEMBER) 
+		{
+			// member node config
+			linkConfig.myType = L2_NODE_MEMBER;
+			linkConfig.myId = 2;
+			Linklayer_Reconfig(linkInstPtr, &linkConfig);
+			Linklayer_Start(linkInstPtr);
+		}
+		else 
+		{
+			// FIXME: 
+			// Halt linklayer
+			Linklayer_Halt(linkInstPtr);
+			DBG_ERROR("Unexpected config command 0x%02X:0x%02X", 
+				WD_MODE_CMD, data[WD_MODE_CMD]);
+		}
 		_nop_(); // for debug
 		Status = SUCCESS;
 		break;