diff --git a/df_datalink_sp/src/systembus/systembus.c b/df_datalink_sp/src/systembus/systembus.c
index 44f7f4e..ef17eb0 100644
--- a/df_datalink_sp/src/systembus/systembus.c
+++ b/df_datalink_sp/src/systembus/systembus.c
@@ -378,21 +378,28 @@ int32_t SystemBus_HandleCmd(SYSBUS *instPtr)
 		PHY_INST *phyRef = linkInstPtr->config.phyInstPtr;
 		TMC_INST *tmcRef = linkInstPtr->config.tmcInstPtr;
 		
-		if (data[WD_MODE_CMD] == MODE_CMD_HEAD 
-			&& L2_GetNodeType(linkInstPtr) != L2_NODE_HEAD) 
+		if (data[WD_MODE_CMD] == MODE_CMD_HEAD)
 		{
-			// head node config
-			linkConfig.myType = L2_NODE_HEAD;
-			linkConfig.myId = 1;
-			Linklayer_Reconfig(linkInstPtr, &linkConfig);
+			// omit unnecessary reconfiguration
+			if (L2_GetNodeType(linkInstPtr) != L2_NODE_HEAD) 
+			{
+				// head node config
+				linkConfig.myType = L2_NODE_HEAD;
+				linkConfig.myId = 1;
+				Linklayer_Reconfig(linkInstPtr, &linkConfig);
+			}
 		}
-		else if (data[WD_MODE_CMD] == MODE_CMD_MEMBER 
-			&& L2_GetNodeType(linkInstPtr) != L2_NODE_MEMBER) 
+		
+		else if (data[WD_MODE_CMD] == MODE_CMD_MEMBER ) 
 		{
-			// member node config
-			linkConfig.myType = L2_NODE_MEMBER;
-			linkConfig.myId = 2;
-			Linklayer_Reconfig(linkInstPtr, &linkConfig);
+			// omit unnecessary reconfiguration
+			if (L2_GetNodeType(linkInstPtr) != L2_NODE_MEMBER)
+			{
+				// member node config
+				linkConfig.myType = L2_NODE_MEMBER;
+				linkConfig.myId = 2;
+				Linklayer_Reconfig(linkInstPtr, &linkConfig);
+			}
 		}
 		else 
 		{