diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/SRRoutingTest.py b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/SRRoutingTest.py
index f5e8d70..479b3f4 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/SRRoutingTest.py
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/SRRoutingTest.py
@@ -40,10 +40,10 @@
 
     main.internalIpv4Hosts = main.params[ 'TOPO' ][ 'internalIpv4Hosts' ].split( ',' )
     main.internalIpv6Hosts = main.params[ 'TOPO' ][ 'internalIpv6Hosts' ].split( ',' )
-    main.externalIpv4Hosts = main.params[ 'TOPO' ][ 'externalIpv4Hosts' ].split( ',' )
-    main.externalIpv6Hosts = main.params[ 'TOPO' ][ 'externalIpv6Hosts' ].split( ',' )
-    main.staticIpv4Hosts = main.params[ 'TOPO' ][ 'staticIpv4Hosts' ].split( ',' )
-    main.staticIpv6Hosts = main.params[ 'TOPO' ][ 'staticIpv6Hosts' ].split( ',' )
+    main.externalIpv4Hosts = main.params[ 'TOPO' ][ 'externalIpv4Hosts' ].split( ',' ) if main.params[ 'TOPO' ].get('externalIpv4Hosts') else []
+    main.externalIpv6Hosts = main.params[ 'TOPO' ][ 'externalIpv6Hosts' ].split( ',' ) if main.params[ 'TOPO' ].get('externalIpv6Hosts') else []
+    main.staticIpv4Hosts = main.params[ 'TOPO' ][ 'staticIpv4Hosts' ].split( ',' ) if main.params[ 'TOPO' ].get('staticIpv4Hosts') else []
+    main.staticIpv6Hosts = main.params[ 'TOPO' ][ 'staticIpv6Hosts' ].split( ',' ) if main.params[ 'TOPO' ].get('staticIpv6Hosts') else []
     main.disconnectedIpv4Hosts = []
     main.disconnectedIpv6Hosts = []
     main.disconnectedExternalIpv4Hosts = []
@@ -56,8 +56,11 @@
     lib.installOnos( main, skipPackage=skipPackage, cliSleep=5 )
 
     # Load configuration files
-    main.cfgName = 'TEST_CONFIG_ipv4={}_ipv6={}'.format( 1 if ipv4 else 0,
-                                                         1 if ipv6 else 0)
+    if hasattr( main, "Mininet1" ):
+        main.cfgName = 'TEST_CONFIG_ipv4={}_ipv6={}'.format( 1 if ipv4 else 0,
+                                                             1 if ipv6 else 0)
+    else:
+        main.cfgName = main.params[ "DEPENDENCY" ][ "confName" ]
     lib.loadJson( main )
     time.sleep( float( main.params[ 'timers' ][ 'loadNetcfgSleep' ] ) )
     lib.loadHost( main )
@@ -82,9 +85,8 @@
         time.sleep( float( main.params[ "timers" ][ "startMininetSleep" ] ) )
     else:
         # Run the test with physical devices
-        lib.connectToPhysicalNetwork( main, self.switchNames )
-        # Check if the devices are up
-        lib.checkDevices( main, switches=len( self.switchNames ) )
+        lib.connectToPhysicalNetwork( main )
+
     # wait some time for onos to install the rules!
     time.sleep( float( main.params[ 'timers' ][ 'dhcpSleep' ] ) )
 
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/host/flex.host b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/host/flex.host
new file mode 100644
index 0000000..0ccf382
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/host/flex.host
@@ -0,0 +1,16 @@
+{
+    "onos":
+    {
+        "0A:5E:0D:F3:EC:D4/None": "10.0.202.7",
+        "12:1C:B7:5C:69:68/None": "10.0.202.8",
+        "EA:DA:19:1E:CB:7D/None": "10.0.204.7",
+        "A2:9B:16:E8:2A:52/None": "10.0.204.8"
+    },
+    "network":
+    {
+        "h4v4": "10.0.202.7",
+        "h5v4": "10.0.202.8",
+        "h9v4": "10.0.204.7",
+        "h10v4": "10.0.204.8"
+    }
+}
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/flex.json b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/flex.json
new file mode 100644
index 0000000..c8f1ff2
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/flex.json
@@ -0,0 +1,460 @@
+{
+    "ports" : {
+        "of:0000000000000205/1" : {
+    	    "interfaces" : [{
+    		    "ips" : [ "10.0.205.254/24" ],
+    		    "vlan-untagged": 205
+    	    }]
+    	},
+        "of:0000000000000205/2" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.205.254/24" ],
+                "vlan-untagged": 205
+            }]
+        },
+        "of:0000000000000206/1" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.206.254/24" ],
+                "vlan-untagged": 206
+            }]
+        },
+        "of:0000000000000206/2" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.206.254/24" ],
+                "vlan-untagged": 206
+            }]
+        },
+        "of:0000000000000203/1" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/2" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/3" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/4" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/5" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/6" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/7" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/8" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000203/20" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-tagged": [204]
+            }]
+        },
+        "of:0000000000000204/1" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/2" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/3" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/4" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/5" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/6" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/7" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/8" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-untagged": 204
+            }]
+        },
+        "of:0000000000000204/20" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.204.254/24" ],
+                "vlan-tagged": [204]
+            }]
+        },
+        "of:0000000000000201/1" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/2" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/3" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/4" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/5" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/6" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/7" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/8" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000201/17" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.101.254/24" ],
+                "vlan-untagged": 101
+            }]
+        },
+        "of:0000000000000201/18" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.101.254/24" ],
+                "vlan-untagged": 101
+            }]
+        },
+        "of:0000000000000201/20" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-tagged": [202]
+            }]
+        },
+        "of:0000000000000202/1" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/2" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/3" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/4" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/5" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/6" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/7" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/8" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-untagged": 202
+            }]
+        },
+        "of:0000000000000202/17" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.102.254/24" ],
+                "vlan-untagged": 102
+            }]
+        },
+        "of:0000000000000202/18" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.102.254/24" ],
+                "vlan-untagged": 102
+            }]
+        },
+        "of:0000000000000202/20" : {
+            "interfaces" : [{
+                "ips" : [ "10.0.202.254/24" ],
+                "vlan-tagged": [202]
+            }]
+        }
+    },
+    "devices" : {
+        "of:0000000000000201" : {
+	        "basic" : {
+	    	    "name": "201-qmx",
+	    	    "latitude" : 34,
+	    	    "longitude": -95
+	        },
+            "segmentrouting" : {
+                "ipv4NodeSid" : 201,
+                "ipv4Loopback" : "192.168.0.201",
+                "ipv6NodeSid" : 201,
+                "ipv6Loopback" : "2000::c0a8:0201",
+                "routerMac" : "00:00:02:01:02:02",
+	    	    "pairDeviceId" : "of:0000000000000202",
+	    	    "pairLocalPort" : 20,
+                "isEdgeRouter" : true,
+                "adjacencySids" : []
+                }
+            },
+	    "of:0000000000000202" : {
+	        "basic" : {
+	    	    "name": "202-qmx",
+	    	    "latitude" : 34,
+	    	    "longitude": -90
+	        },
+	        "segmentrouting" : {
+                "ipv4NodeSid" : 202,
+                "ipv4Loopback" : "192.168.0.202",
+                "ipv6NodeSid" : 202,
+                "ipv6Loopback" : "2000::c0a8:0202",
+                "routerMac" : "00:00:02:01:02:02",
+                "isEdgeRouter" : true,
+                "pairDeviceId" : "of:0000000000000201",
+                "pairLocalPort" : 20,
+	    	    "adjacencySids" : []
+            }
+        },
+        "of:0000000000000203" : {
+	        "basic" : {
+	            "name": "203-qmx",
+	            "latitude" : 34,
+	            "longitude": -108
+	        },
+            "segmentrouting" : {
+                "name" : "Leaf2-R1",
+                "ipv4NodeSid" : 203,
+                "ipv4Loopback" : "192.168.0.203",
+                "ipv6NodeSid" : 203,
+                "ipv6Loopback" : "2000::c0a8:0203",
+                "routerMac" : "00:00:02:03:02:04",
+                "isEdgeRouter" : true,
+                "pairDeviceId" : "of:0000000000000204",
+                "pairLocalPort" : 20,
+                "adjacencySids" : []
+            }
+        },
+        "of:0000000000000204" : {
+	        "basic" : {
+	            "name": "204-qmx",
+	            "latitude" : 34,
+	            "longitude": -103
+	        },
+            "segmentrouting" : {
+                "name" : "Leaf1-R1",
+                "ipv4NodeSid" : 204,
+                "ipv4Loopback" : "192.168.0.204",
+                "ipv6NodeSid" : 204,
+                "ipv6Loopback" : "2000::c0a8:0204",
+                "routerMac" : "00:00:02:03:02:04",
+                "pairDeviceId" : "of:0000000000000203",
+                "pairLocalPort" : 20,
+                "isEdgeRouter" : true,
+                "adjacencySids" : []
+            }
+        },
+   	    "of:0000000000000225" : {
+	        "basic" : {
+	    	    "name": "225-t2",
+	    	    "latitude" : 42,
+	    	    "longitude": -100
+	        },
+        	"segmentrouting" : {
+                "name" : "SpineToma-0",
+                "ipv4NodeSid" : 225,
+                "ipv4Loopback" : "192.168.0.225",
+	    	    "ipv6NodeSid" : 225,
+                "ipv6Loopback" : "2000::c0a8:0225",
+                "routerMac" : "00:00:02:25:00:01",
+                "isEdgeRouter" : false,
+	    	    "adjacencySids" : []
+            }
+        },
+        "of:0000000000000226" : {
+	        "basic" : {
+	    	    "name": "226-tmhk",
+	    	    "latitude" : 42,
+	    	    "longitude": -95
+	        },
+            "segmentrouting" : {
+                "name" : "Spine1",
+                "ipv4NodeSid" : 226,
+                "ipv4Loopback" : "192.168.0.226",
+                "ipv6NodeSid" : 226,
+                "ipv6Loopback" : "2000::c0a8:0226",
+                "routerMac" : "00:00:02:26:00:01",
+                "isEdgeRouter" : false,
+                "adjacencySids" : []
+            }
+        },
+        "of:0000000000000205":{
+            "basic":{
+                "name":"205-qmx",
+                "latitude":34,
+                "longitude":-120
+            },
+            "segmentrouting":{
+                "name":"Leaf1",
+                "ipv4NodeSid":205,
+                "ipv4Loopback":"192.168.0.205",
+                "ipv6NodeSid":205,
+                "ipv6Loopback":"2000::c0a8:0205",
+                "routerMac":"00:00:02:05:06:01",
+                "isEdgeRouter":true,
+                "adjacencySids":[
+                ]
+            }
+        },
+        "of:0000000000000206":{
+            "basic":{
+                "name":"206-qmx",
+                "latitude":34,
+                "longitude":-115
+            },
+            "segmentrouting":{
+                "name":"Leaf2",
+                "ipv4NodeSid":206,
+                "ipv4Loopback":"192.168.0.206",
+                "ipv6NodeSid":206,
+                "ipv6Loopback":"2000::c0a8:0206",
+                "routerMac":"00:00:02:06:06:01",
+                "isEdgeRouter":true,
+                "adjacencySids":[
+                ]
+            }
+        },
+        "of:0000000000000227":{
+            "basic":{
+                "name":"227-tmhk",
+                "latitude":38,
+                "longitude":-119
+            },
+            "segmentrouting":{
+                "name":"Spine1",
+                "ipv4NodeSid":227,
+                "ipv4Loopback":"192.168.0.227",
+                "ipv6NodeSid":227,
+                "ipv6Loopback":"2000::c0a8:0227",
+                "routerMac":"00:00:02:27:00:01",
+                "isEdgeRouter":false,
+                "adjacencySids":[
+                ]
+            }
+        },
+        "of:0000000000000228":{
+            "basic":{
+                "name":"228-t2",
+                "latitude":38,
+                "longitude":-116
+            },
+            "segmentrouting":{
+                "name":"Spine2",
+                "ipv4NodeSid":228,
+                "ipv4Loopback":"192.168.0.228",
+                "ipv6NodeSid":228,
+                "ipv6Loopback":"2000::c0a8:0228",
+                "routerMac":"00:00:02:28:00:01",
+                "isEdgeRouter":false,
+                "adjacencySids":[
+                ]
+            }
+        }
+    },
+    "apps" : {
+            "org.onosproject.dhcprelay" : {
+    	    "default" : [
+    		    {
+                    "dhcpServerConnectPoint": "of:0000000000000204/8",
+                    "serverIps": ["10.0.204.8"]
+    		    }
+    	    ]
+        }
+    }
+}
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/linkFailure/flex.linkFailureChart b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/linkFailure/flex.linkFailureChart
new file mode 100644
index 0000000..784fbd3
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/linkFailure/flex.linkFailureChart
@@ -0,0 +1,17 @@
+{
+    "link_batch_1" : { "links" : { "link1" : ["spine103", "spine101"],
+		      		   "link2" : ["leaf2", "spine101"],
+	              		   "link3" : ["leaf3", "spine101"],
+		      		   "link4" : ["leaf4", "spine101"],
+		      	           "link5" : ["leaf5", "spine101"] },
+			"links_before" : 48,
+			"links_after" : 30 },
+    "link_batch_2" : { "links" : { "link1" : ["spine104", "spine102"],
+		      		   "link2" : ["leaf2", "spine102"],
+	              		   "link3" : ["leaf3", "spine102"],
+		      		   "link4" : ["leaf4", "spine102"],
+		      	           "link5" : ["leaf5", "spine102"] },
+			"links_before" : 48,
+			"links_after" : 30 }
+}
+
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/switchFailure/flex.switchFailureChart b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/switchFailure/flex.switchFailureChart
new file mode 100644
index 0000000..96e4982
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/switchFailure/flex.switchFailureChart
@@ -0,0 +1,10 @@
+{
+    "spine101": { "switches_before_failure": 10,
+                  "links_before_failure": 48,
+                  "switches_after_failure": 9,
+                  "links_after_failure": 30 },
+    "spine102": { "switches_before_failure": 10,
+                  "links_before_failure": 48,
+                  "switches_after_failure": 9,
+                  "links_after_failure": 30 }
+}