diff --git a/src/emuvim/dcemulator/node.py b/src/emuvim/dcemulator/node.py
index d5a8cdf..9439eeb 100755
--- a/src/emuvim/dcemulator/node.py
+++ b/src/emuvim/dcemulator/node.py
@@ -67,7 +67,7 @@
             vnf_interface = str(i)
             dc_port_name = self.datacenter.net.find_connected_dc_interface(vnf_name, vnf_interface)
             # format list of tuples (name, Ip, MAC, isUp, status, dc_portname)
-            intf_dict = {'intf_name': str(i), 'ip': i.IP(), 'mac': i.MAC(), 'up': i.isUp(), 'status': i.status(), 'dc_portname': dc_port_name}
+            intf_dict = {'intf_name': str(i), 'ip': i.IP(), 'netmask': i.prefixLen, 'mac': i.MAC(), 'up': i.isUp(), 'status': i.status(), 'dc_portname': dc_port_name}
             networkStatusList.append(intf_dict)
 
         return networkStatusList
diff --git a/src/emuvim/test/unittests/test_sonata_dummy_gatekeeper.py b/src/emuvim/test/unittests/test_sonata_dummy_gatekeeper.py
index bfa9541..277e75c 100755
--- a/src/emuvim/test/unittests/test_sonata_dummy_gatekeeper.py
+++ b/src/emuvim/test/unittests/test_sonata_dummy_gatekeeper.py
@@ -33,8 +33,9 @@
 import unittest
 from emuvim.test.base import SimpleTestTopology
 from emuvim.api.sonata import SonataDummyGatekeeperEndpoint
-from emuvim.api.sonata.dummygatekeeper import initialize_GK
+from emuvim.api.sonata.dummygatekeeper import initialize_GK, parse_interface
 import mininet.clean
+from ipaddress import ip_network
 
 PACKAGE_PATH = "misc/sonata-demo-service.son"
 
@@ -88,20 +89,43 @@
         self.assertEqual(len(self.dc[0].listCompute()), 2)
         # check connectivity by using ping
         ELAN_list=[]
-        for i in [0]:
-            for vnf in self.dc[i].listCompute():
-                # check connection
-                p = self.net.ping([self.h[i], vnf])
-                print p
-                self.assertTrue(p <= 0.0)
 
-                # check E LAN connection
-                network_list = vnf.getNetworkStatus()
-                mgmt_ip = [intf['ip'] for intf in network_list if intf['intf_name'] == 'mgmt']
-                self.assertTrue(len(mgmt_ip) > 0)
-                ip_address = mgmt_ip[0]
-                ELAN_list.append(ip_address)
-                print ip_address
+        # check E-Line connection, by checking the IP addresses
+        for link in self.net.deployed_elines:
+            vnf_src, intf_src, vnf_sap_docker_name = parse_interface(link['connection_points_reference'][0])
+            print vnf_src, intf_src
+            src = self.net.getNodeByName(vnf_src)
+            if not src:
+                continue
+            network_list = src.getNetworkStatus()
+            src_ip = [intf['ip'] for intf in network_list if intf['intf_name'] == intf_src][0]
+            src_mask = [intf['netmask'] for intf in network_list if intf['intf_name'] == intf_src][0]
+
+            vnf_dst,  intf_dst, vnf_sap_docker_name = parse_interface(link['connection_points_reference'][1])
+            dst = self.net.getNodeByName(vnf_dst)
+            if not dst:
+                continue
+            network_list = dst.getNetworkStatus()
+            dst_ip = [intf['ip'] for intf in network_list if intf['intf_name'] == intf_dst][0]
+            dst_mask = [intf['netmask'] for intf in network_list if intf['intf_name'] == intf_dst][0]
+
+            print "src = {0}:{1} ip={2}/{3} ".format(vnf_src, intf_src, src_ip, src_mask)
+            print "dst = {0}:{1} ip={2}/{3} ".format(vnf_dst, intf_dst, dst_ip, dst_mask)
+
+            # check if the E-Line IP's are in the same subnet
+            ret = ip_network(u'{0}/{1}'.format(src_ip, src_mask), strict=False)\
+                .compare_networks(ip_network(u'{0}/{1}'.format(dst_ip, dst_mask),strict=False))
+            self.assertTrue(ret == 0)
+
+
+        for vnf in self.dc[0].listCompute():
+            # check E LAN connection
+            network_list = vnf.getNetworkStatus()
+            mgmt_ip = [intf['ip'] for intf in network_list if intf['intf_name'] == 'mgmt']
+            self.assertTrue(len(mgmt_ip) > 0)
+            ip_address = mgmt_ip[0]
+            ELAN_list.append(ip_address)
+            print ip_address
 
         # check ELAN connection by ping over the mgmt network (needs to be configured as ELAN in the test service)
         for vnf in self.dc[0].listCompute():
@@ -122,7 +146,7 @@
         self.stopNet()
         initialize_GK()
 
-#    @unittest.skip("disabled")
+    #@unittest.skip("disabled")
     def test_GK_Api_stop_service(self):
         # create network
         self.createNet(ndatacenter=2, nhosts=2)
@@ -180,6 +204,8 @@
         self.stopNet()
         initialize_GK()
 
+
+    #@unittest.skip("disabled")
     def test_GK_stress_service(self):
         # create network
         self.createNet(ndatacenter=2, nhosts=2)