diff --git a/src/emuvim/dcemulator/monitoring.py b/src/emuvim/dcemulator/monitoring.py
index 2e1e041..875913f 100755
--- a/src/emuvim/dcemulator/monitoring.py
+++ b/src/emuvim/dcemulator/monitoring.py
@@ -45,7 +45,8 @@
 """
 
 PUSHGATEWAY_PORT = 9091
-CADVISOR_PORT = 8080
+# we cannot use port 8080 because ryu-ofrest api  is already using that one
+CADVISOR_PORT = 8081
 
 class DCNetworkMonitor():
     def __init__(self, net):
@@ -96,8 +97,8 @@
 
         # helper tools
         # cAdvisor, Prometheus pushgateway are started as external container, to gather monitoring metric in son-emu
-        self.start_PushGateway()
-        self.start_cAdvisor()
+        self.pushgateway_process = self.start_PushGateway()
+        self.cadvisor_process = self.start_cAdvisor()
 
 
     # first set some parameters, before measurement can start
@@ -467,7 +468,7 @@
             logging.warning("Pushgateway not reachable: {0} {1}".format(Exception, e))
 
 
-    def start_Prometheus(self, port=CADVISOR_PORT):
+    def start_Prometheus(self, port=9090):
         # prometheus.yml configuration file is located in the same directory as this file
         cmd = ["docker",
                "run",
@@ -493,7 +494,7 @@
         logging.info('Start Prometheus Push Gateway container {0}'.format(cmd))
         return Popen(cmd)
 
-    def start_cAdvisor(self, port=8080):
+    def start_cAdvisor(self, port=CADVISOR_PORT):
         cmd = ["docker",
                "run",
                "--rm",
@@ -521,7 +522,7 @@
             self.prometheus_process.terminate()
             self.prometheus_process.kill()
             self._stop_container('prometheus')
-
+        '''
         if self.pushgateway_process is not None:
             logging.info('stopping pushgateway container')
             self.pushgateway_process.terminate()
@@ -533,7 +534,6 @@
             self.cadvisor_process.terminate()
             self.cadvisor_process.kill()
             self._stop_container('cadvisor')
-        '''
 
     def switch_tx_rx(self,metric=''):
         # when monitoring vnfs, the tx of the datacenter switch is actually the rx of the vnf