diff --git a/ft/modbus_tcp_test.robot b/ft/modbus_tcp_test.robot
index a700eb66..83d18aa8 100644
--- a/ft/modbus_tcp_test.robot
+++ b/ft/modbus_tcp_test.robot
@@ -179,7 +179,7 @@ Modbus Test Setup
 
 	${state}=	Get Node State    ${modbus_node}
 	Should Be Equal As Integers    ${state}[running]    ${NODE_STATE_RUNNING}
-	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_CONNECTING}
+	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_DISCONNECTED}
 
 Modbus Test Teardown
 	Del Node  ${modbus_node}
diff --git a/ft/node_ctl_test.robot b/ft/node_ctl_test.robot
index d29b7cf1..a8aeca0a 100644
--- a/ft/node_ctl_test.robot
+++ b/ft/node_ctl_test.robot
@@ -37,7 +37,7 @@ Start the configured node, it should return success
     	Node Setting        modbus-node		${MODBUS_TCP_CONFIG}
     	${state} =    Get Node State    modbus-node
     	Should Be Equal As Integers    ${state}[running]    ${NODE_STATE_READY}
-    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_CONNECTING}
+    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_DISCONNECTED}
 
     	${res} =                 Node Ctl    modbus-node    ${NODE_CTL_START}
     	Check Response Status    ${res}      200
@@ -45,7 +45,7 @@ Start the configured node, it should return success
 
     	#${state} =    Get Node State    modbus-node
     	#Should Be Equal As Integers    ${state}[running]    ${NODE_STATE_RUNNING}
-    	#Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_CONNECTING}
+    	#Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_DISCONNECTED}
 
     	${res} =                 Node Ctl    modbus-node    ${NODE_CTL_STOP}
     	Check Response Status    ${res}      200
@@ -53,7 +53,7 @@ Start the configured node, it should return success
 
     	${state} =    Get Node State    modbus-node
     	Should Be Equal As Integers    ${state}[running]    ${NODE_STATE_STOP}
-    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_CONNECTING}
+    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_DISCONNECTED}
 
 Stop node that is stopped, it should return failure
     	${res} =                 Node Ctl    modbus-node    ${NODE_CTL_STOP}
@@ -67,7 +67,7 @@ Start the stopped node, it should return success
 
     	${state} =    Get Node State    modbus-node
     	Should Be Equal As Integers    ${state}[running]    ${NODE_STATE_RUNNING}
-    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_CONNECTING}
+    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_DISCONNECTED}
 
 Start the running node, it should return failure
     	${res} =                 Node Ctl    modbus-node    ${NODE_CTL_START}
@@ -79,7 +79,7 @@ When setting up a READY/RUNNING/STOPED node, the node status will not change
 
     	${state} =    Get Node State    modbus-node
     	Should Be Equal As Integers    ${state}[running]    ${NODE_STATE_RUNNING}
-    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_CONNECTING}
+    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_DISCONNECTED}
 
     	${res} =                 Node Ctl    modbus-node    ${NODE_CTL_STOP}
     	Check Response Status    ${res}      200
@@ -89,6 +89,6 @@ When setting up a READY/RUNNING/STOPED node, the node status will not change
 
     	${state} =    Get Node State    modbus-node
     	Should Be Equal As Integers    ${state}[running]    ${NODE_STATE_STOP}
-    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_CONNECTING}
+    	Should Be Equal As Integers    ${state}[link]       ${NODE_LINK_STATE_DISCONNECTED}
 
     	[Teardown]    Del Node  modbus-node
\ No newline at end of file
diff --git a/ft/resource/api.resource b/ft/resource/api.resource
index 23c67e8a..8ff35e9b 100644
--- a/ft/resource/api.resource
+++ b/ft/resource/api.resource
@@ -17,8 +17,7 @@ ${NODE_STATE_RUNNING}	3
 ${NODE_STATE_STOP}	4
 
 ${NODE_LINK_STATE_DISCONNECTED}    0
-${NODE_LINK_STATE_CONNECTING}      1
-${NODE_LINK_STATE_CONNECTED}       2
+${NODE_LINK_STATE_CONNECTED}       1
 
 ${NODE_CTL_START}	0
 ${NODE_CTL_STOP}	1
diff --git a/include/neuron/define.h b/include/neuron/define.h
index d939b79e..475de606 100644
--- a/include/neuron/define.h
+++ b/include/neuron/define.h
@@ -47,8 +47,7 @@ typedef enum {
 
 typedef enum {
     NEU_NODE_LINK_STATE_DISCONNECTED = 0,
-    NEU_NODE_LINK_STATE_CONNECTING   = 1,
-    NEU_NODE_LINK_STATE_CONNECTED    = 2,
+    NEU_NODE_LINK_STATE_CONNECTED    = 1,
 } neu_node_link_state_e;
 
 typedef enum {
diff --git a/plugins/modbus/modbus_tcp.c b/plugins/modbus/modbus_tcp.c
index fbf6e01d..9ffffcd1 100644
--- a/plugins/modbus/modbus_tcp.c
+++ b/plugins/modbus/modbus_tcp.c
@@ -147,7 +147,7 @@ static int driver_config(neu_plugin_t *plugin, const char *config)
     plog_info(plugin, "config: host: %s, port: %" PRId64 ", timeout: %" PRId64,
               host.v.val_str, port.v.val_int, timeout.v.val_int);
 
-    plugin->common.link_state = NEU_NODE_LINK_STATE_CONNECTING;
+    plugin->common.link_state = NEU_NODE_LINK_STATE_DISCONNECTED;
     if (plugin->conn != NULL) {
         plugin->conn = neu_conn_reconfig(plugin->conn, &param);
     } else {
diff --git a/plugins/mqtt/mqtt_plugin.c b/plugins/mqtt/mqtt_plugin.c
index 6c940800..37aa40a9 100644
--- a/plugins/mqtt/mqtt_plugin.c
+++ b/plugins/mqtt/mqtt_plugin.c
@@ -415,7 +415,7 @@ static int plguin_start_running(neu_plugin_t *plugin)
 
         plugin->routine           = routine;
         plugin->running           = true;
-        plugin->common.link_state = NEU_NODE_LINK_STATE_CONNECTING;
+        plugin->common.link_state = NEU_NODE_LINK_STATE_DISCONNECTED;
     }
 
     return 0;