diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.py b/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.py
index d5a928c..4735cdd 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.py
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/SRRouting.py
@@ -14,7 +14,7 @@
                                test_idx=1,
                                onosNodes=3,
                                dhcp=1,
-                               routers=0,
+                               routers=1,
                                ipv4=1,
                                ipv6=0,
                                description="Ping between all ipv4 hosts in the topology")
@@ -30,7 +30,7 @@
                                test_idx=2,
                                onosNodes=3,
                                dhcp=1,
-                               routers=0,
+                               routers=1,
                                ipv4=0,
                                ipv6=1,
                                description="Ping between all ipv6 hosts in the topology")
@@ -46,7 +46,7 @@
                                test_idx=3,
                                onosNodes=3,
                                dhcp=1,
-                               routers=0,
+                               routers=1,
                                ipv4=1,
                                ipv6=1,
                                description="Ping between all ipv4 and ipv6 hosts in the topology")
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=0_ipv6=1_dhcp=1_routers=1.chart b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=0_ipv6=1_dhcp=1_routers=1.chart
new file mode 100644
index 0000000..e77d1c5
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=0_ipv6=1_dhcp=1_routers=1.chart
@@ -0,0 +1,4 @@
+{
+  "ipv6": {"expect": "True",
+   "hosts":["h1v6", "h2v6" ,"h3v6", "h4v6", "h5v6", "h6v6", "h7v6", "h8v6", "h9v6", "h10v6", "h11v6"]}
+}
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=0_dhcp=1_routers=1.chart b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=0_dhcp=1_routers=1.chart
new file mode 100644
index 0000000..8fc87ff
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=0_dhcp=1_routers=1.chart
@@ -0,0 +1,4 @@
+{
+  "ipv4": {"expect": "True",
+    "hosts":["h1v4", "h2v4" ,"h3v4", "h4v4", "h5v4", "h6v4", "h7v4", "h8v4", "h9v4", "h10v4", "h11v4"]}
+}
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart
similarity index 89%
rename from TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart
rename to TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart
index cf98771..cdd437d 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart
@@ -1,5 +1,5 @@
 {
-  "ipv6": {"expect": "True", 
+  "ipv6": {"expect": "True",
 	   "hosts": ["h1v6", "h2v6" ,"h3v6", "h4v6", "h5v6", "h6v6", "h7v6", "h8v6", "h9v6", "h10v6", "h11v6"]},
   "ipv4": {"expect": "True",
            "hosts": ["h1v4", "h2v4" ,"h3v4", "h4v4", "h5v4", "h6v4", "h7v4", "h8v4", "h9v4", "h10v4", "h11v4"]}
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=1.chart
similarity index 88%
copy from TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart
copy to TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=1.chart
index cf98771..cdd437d 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=0.chart
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/chart/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=1.chart
@@ -1,5 +1,5 @@
 {
-  "ipv6": {"expect": "True", 
+  "ipv6": {"expect": "True",
 	   "hosts": ["h1v6", "h2v6" ,"h3v6", "h4v6", "h5v6", "h6v6", "h7v6", "h8v6", "h9v6", "h10v6", "h11v6"]},
   "ipv4": {"expect": "True",
            "hosts": ["h1v4", "h2v4" ,"h3v4", "h4v4", "h5v4", "h6v4", "h7v4", "h8v4", "h9v4", "h10v4", "h11v4"]}
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp1.conf b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp1.conf
index d4f09ea..b30eaa1 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp1.conf
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp1.conf
@@ -6,4 +6,4 @@
 !
 ip route 0.0.0.0/0 172.16.0.1
 !
-fpm connection ip 10.128.100.67 port 2620
+fpm connection ip 10.192.19.231 port 2620
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp2.conf b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp2.conf
index 9ecb6f6..fe27a14 100644
--- a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp2.conf
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/conf/zebradbgp2.conf
@@ -6,4 +6,4 @@
 !
 ip route 0.0.0.0/0 172.16.0.1
 !
-fpm connection ip 10.128.100.67 port 2620
+fpm connection ip 10.192.19.231 port 2620
diff --git a/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=1.json b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=1.json
new file mode 100644
index 0000000..7294d8b
--- /dev/null
+++ b/TestON/tests/USECASE/SegmentRouting/SRRouting/dependencies/json/COMCAST_CONFIG_ipv4=1_ipv6=1_dhcp=1_routers=1.json
@@ -0,0 +1,486 @@
+{
+    "ports" : {
+        "of:0000000000000001/3" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1000::3ff/120" ],
+                    "vlan-untagged": 10
+                }
+            ]
+        },
+        "of:0000000000000001/4" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1001::3ff/120" ],
+                    "vlan-untagged": 10
+                }
+            ]
+        },
+        "of:0000000000000001/5" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.1.0.254/24" ],
+                    "vlan-untagged": 10
+                }
+            ]
+        },
+        "of:0000000000000001/6" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.1.10.254/24" ],
+                    "vlan-untagged": 10
+                }
+            ]
+        },
+        "of:0000000000000002/6" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1002::3ff/120" ],
+                    "vlan-untagged": 10
+                }
+            ]
+        },
+        "of:0000000000000002/7" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1003::3ff/120" ],
+                    "vlan-untagged": 15
+                }
+            ]
+        },
+        "of:0000000000000002/8" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1004::3ff/120" ],
+                    "vlan-tagged": [30]
+                }
+            ]
+        },
+        "of:0000000000000002/9" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.2.0.254/24" ],
+                    "vlan-untagged": 10
+                }
+            ]
+        },
+        "of:0000000000000002/10" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.2.30.254/24" ],
+                    "vlan-untagged": 16
+                }
+            ]
+        },
+        "of:0000000000000002/11" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.2.20.254/24" ],
+                    "vlan-tagged": [30]
+                }
+            ]
+        },
+        "of:0000000000000003/6" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1003::3ff/120" ],
+                    "vlan-untagged": 15
+                }
+            ]
+        },
+        "of:0000000000000003/7" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1004::3ff/120" ],
+                    "vlan-tagged": [30]
+                }
+            ]
+        }, 
+        "of:0000000000000003/8" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1005::3ff/120" ],
+                    "vlan-tagged": [20]
+                }
+            ]
+        },
+	"of:0000000000000003/9" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1006::3ff/120" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000003/10" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.2.30.254/24" ],
+                    "vlan-untagged": 15
+                }
+            ]
+        },
+        "of:0000000000000003/11" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.2.20.254/24" ],
+                    "vlan-tagged": [30]
+                }
+            ]
+        }, 
+        "of:0000000000000003/12" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.2.10.254/24" ],
+                    "vlan-tagged": [20]
+                }
+            ]
+        },
+	"of:0000000000000003/13" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.2.40.254/24" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000004/6" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1007::3ff/120" ],
+                    "vlan-tagged": [30]
+                }
+            ]
+        },
+        "of:0000000000000004/7" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1008::3ff/120" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000004/8" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1009::3ff/120" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000004/9" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.3.0.254/24" ],
+                    "vlan-tagged": [30]
+                }
+            ]
+        },
+        "of:0000000000000004/10" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.3.10.254/24" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000004/11" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.3.30.254/24" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000004/12" : {
+            "interfaces" : [
+                {
+			"ips" : [ "10.0.1.254/24", "10.0.7.254/24", "2000::1ff/120", "2000::7ff/120" ],
+			"vlan-tagged": [110, 170]
+
+                }
+            ]
+        },
+        "of:0000000000000004/13" : {
+            "interfaces" : [
+                {
+			"ips" : [ "10.0.1.254/24", "2000::1ff/120"],
+			"vlan-untagged": 110
+
+                }
+            ]
+        },
+        "of:0000000000000004/14" : {
+            "interfaces" : [
+                {
+			"ips" : [ "10.0.7.254/24", "2000::7ff/120" ],
+			"vlan-untagged": 170
+
+                }
+            ]
+        },
+        "of:0000000000000005/6" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1008::3ff/120" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000005/7" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1009::3ff/120" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000005/8" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "1010::3ff/120" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000005/9" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.3.10.254/24" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000005/10" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.3.30.254/24" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000005/11" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.3.20.254/24" ],
+                    "vlan-tagged": [40]
+                }
+            ]
+        },
+        "of:0000000000000005/12" : {
+            "interfaces" : [
+                {
+                       "ips" : [ "10.0.5.254/24", "10.0.6.254/24", "2000::5ff/120", "2000::6ff/120" ],
+	               "vlan-tagged": [150, 160]
+                }
+            ]
+        },
+        "of:0000000000000005/13" : {
+            "interfaces" : [
+                {
+                       "ips" : [ "10.0.5.254/24", "2000::5ff/120"],
+	               "vlan-untagged": 150
+                }
+            ]
+        },
+        "of:0000000000000005/14" : {
+            "interfaces" : [
+                {
+                       "ips" : [ "10.0.6.254/24", "2000::6ff/120" ],
+	               "vlan-untagged": 160
+                }
+            ]
+        },
+        "of:0000000000000005/15" : {
+            "interfaces" : [
+                {
+                    "ips" : [ "10.0.3.254/24", "2000::3ff/120" ],
+                    "vlan-untagged": 15
+                }
+            ]
+        }
+    },
+    "hosts" : { 
+	"00:bb:00:00:00:04/30" : {
+		"basic": {
+			"locations": ["of:0000000000000003/7","of:0000000000000002/8"],
+			"ips": ["1004::3fe"]
+		     }
+	    },
+	"00:bb:00:00:00:05/20" : {
+		"basic": {
+			"locations": ["of:0000000000000003/8"],
+			"ips": ["1005::3fe"]
+		     }
+	    },
+	"00:bb:00:00:01:05/40" : {
+		"basic": {
+			"locations": ["of:0000000000000003/9"],
+			"ips": ["1006::3fe"]
+		     }
+	    },
+	"00:bb:00:00:00:06/30" : {
+		"basic": {
+			"locations": ["of:0000000000000004/6"],
+			"ips": ["1007::3fe"]
+		     }
+	    },
+	"00:bb:00:00:00:07/40" : {
+		"basic": {
+			"locations": ["of:0000000000000005/6", "of:0000000000000004/7"],
+			"ips": ["1008::3fe"]
+		     }
+	    },
+	"00:bb:00:00:00:08/40" : {
+		"basic": {
+			"locations": ["of:0000000000000004/8","of:0000000000000005/7"],
+			"ips": ["1009::3fe"]
+		     }
+	    },
+	"00:bb:00:00:00:0A/40" : {
+		"basic": {
+			"locations": ["of:0000000000000005/8"],
+			"ips": ["1010::3fe"]
+		     }
+	    }
+    },
+    "devices" : {
+        "of:0000000000000001" : {
+            "segmentrouting" : {
+                "name" : "s001",
+                "ipv4NodeSid" : 1,
+		"ipv6NodeSid" : 101,
+		"ipv6Loopback" : "2000::c0a8:0001",
+                "ipv4Loopback" : "192.168.0.1",
+                "routerMac" : "00:00:00:00:00:01",
+                "isEdgeRouter" : true,
+                "adjacencySids" : []
+            },
+            "basic" : {
+                "driver" : "ofdpa-ovs",
+		"latitude":34,	
+		"longitude":-105
+            }
+        },
+        "of:0000000000000002" : {
+            "segmentrouting" : {
+                "name" : "s002",
+                "ipv4NodeSid" : 2,
+                "ipv4Loopback" : "192.168.0.2",
+		"ipv6NodeSid" : 102,
+		"ipv6Loopback" : "2000::c0a8:0002",
+                "routerMac" : "00:00:00:00:00:02",
+                "isEdgeRouter" : true,
+                "pairLocalPort" : 5,
+                "pairDeviceId": "of:0000000000000003",
+                "adjacencySids" : []
+            },
+            "basic" : {
+                "driver" : "ofdpa-ovs",
+		"latitude":34,	
+		"longitude":-95
+            }
+        },
+        "of:0000000000000003" : {
+            "segmentrouting" : {
+                "name" : "s003",
+                "ipv4NodeSid" : 3,
+                "ipv4Loopback" : "192.168.0.3",
+        	"ipv6NodeSid" : 103,
+		"ipv6Loopback" : "2000::c0a8:0003",
+                "routerMac" : "00:00:00:00:00:02",
+                "isEdgeRouter" : true,
+                "pairLocalPort" : 5,
+                "pairDeviceId": "of:0000000000000002",
+                "adjacencySids" : []
+            },
+            "basic" : {
+                "driver" : "ofdpa-ovs",
+		"latitude":34,	
+		"longitude":-90
+            }
+        },
+        "of:0000000000000004" : {
+            "segmentrouting" : {
+                "name" : "s004",
+                "ipv4NodeSid" : 4,
+                "ipv4Loopback" : "192.168.0.4",
+		"ipv6NodeSid" : 104,
+		"ipv6Loopback" : "2000::c0a8:0004",        
+                "routerMac" : "00:00:00:00:00:04",
+                "isEdgeRouter" : true,
+                "pairLocalPort" : 5,
+                "pairDeviceId": "of:0000000000000005",
+                "adjacencySids" : []
+            },
+            "basic" : {
+                "driver" : "ofdpa-ovs",
+		"latitude":34,	
+		"longitude":-85
+            }
+        },
+        "of:0000000000000005" : {
+            "segmentrouting" : {
+                "name" : "s005",
+                "ipv4NodeSid" : 5,
+                "ipv4Loopback" : "192.168.0.5",
+		"ipv6NodeSid" : 105,
+		"ipv6Loopback" : "2000::c0a8:0005", 
+                "routerMac" : "00:00:00:00:00:04",
+                "isEdgeRouter" : true,
+                "pairLocalPort" : 5,
+                "pairDeviceId": "of:0000000000000004",
+                "adjacencySids" : []
+            },
+            "basic" : {
+                "driver" : "ofdpa-ovs",
+		"latitude":34,	
+		"longitude":-80
+            }
+        },
+        "of:0000000000000101" : {
+            "segmentrouting" : {
+                "name" : "s101",
+                "ipv4NodeSid" : 101,
+                "ipv4Loopback" : "192.168.0.101",
+		"ipv6NodeSid" : 201,
+		"ipv6Loopback" : "2000::c0a8:0101", 
+                "routerMac" : "00:00:00:00:01:01",
+                "isEdgeRouter" : false,
+                "adjacencySids" : []
+            },
+            "basic" : {
+                "driver" : "ofdpa-ovs",
+		"latitude":42,
+                "longitude":-100
+            }
+        },
+        "of:0000000000000102" : {
+            "segmentrouting" : {
+                "name" : "s102",
+                "ipv4NodeSid" : 102,
+                "ipv4Loopback" : "192.168.0.102",
+		"ipv6NodeSid" : 202,
+		"ipv6Loopback" : "2000::c0a8:0202",
+                "routerMac" : "00:00:00:00:01:02",
+                "isEdgeRouter" : false,
+                "adjacencySids" : []
+            },
+            "basic" : {
+                 "driver" : "ofdpa-ovs",
+		 "latitude":42,
+		 "longitude":-95
+            }
+        }   
+    },
+    "apps" : {
+        "org.onosproject.dhcprelay" : {
+            "default": [
+                {
+                    "dhcpServerConnectPoint": "of:0000000000000005/15",
+                    "serverIps": ["10.0.3.253", "2000::3fd"]
+                }
+            ]
+        }
+    }
+}
diff --git a/TestON/tests/USECASE/SegmentRouting/dependencies/comcast_fabric.py b/TestON/tests/USECASE/SegmentRouting/dependencies/comcast_fabric.py
index 9e2812d..568760b 100644
--- a/TestON/tests/USECASE/SegmentRouting/dependencies/comcast_fabric.py
+++ b/TestON/tests/USECASE/SegmentRouting/dependencies/comcast_fabric.py
@@ -259,9 +259,10 @@
             print("No hosts were created!")
 
         # create quagga routers
+        # Note: Change "fpm connection ip" to $OC1 in zebradbgp1.conf and zebradbgp2.conf to make quagga work correctly
         if routers:
             last_ls = self.leafs[4]
-            last_paired_ls = self. leafs[3]
+            last_paired_ls = self.leafs[3]
 
             # Control plane switch (for quagga fpm)
             cs0 = self.addSwitch('cs0', cls=OVSBridge)
@@ -307,8 +308,8 @@
             self.addLink(r1, last_ls)
 
             # External IPv4 Host behind r1
-            rh1 = self.addHost('rh1', cls=RoutedHost, ips=['10.0.99.2/24'], gateway='10.0.99.1')
-            self.addLink(r1, rh1)
+            rh1v4 = self.addHost('rh1v4', cls=RoutedHost, ips=['10.0.99.2/24'], gateway='10.0.99.1')
+            self.addLink(r1, rh1v4)
 
             # External IPv6 Host behind r1
             rh1v6 = self.addHost('rh1v6', cls=RoutedHost, ips=['2000::9902/120'], gateway='2000::9901')
@@ -331,11 +332,11 @@
             self.addLink(r2, last_paired_ls)
 
             # External IPv4 Host behind r2
-            rh2 = self.addHost('rh2', cls=RoutedHost, ips=['10.0.99.2/24'], gateway='10.0.99.1')
-            self.addLink(r2, rh2)
+            rh2v4 = self.addHost('rh2v4', cls=RoutedHost, ips=['10.0.99.2/24'], gateway='10.0.99.1')
+            self.addLink(r2, rh2v4)
 
             # External IPv6 Host behind r2
-            rh2v6 = self.addHost('rh126', cls=RoutedHost, ips=['2000::9902/120'], gateway='2000::9901')
+            rh2v6 = self.addHost('rh2v6', cls=RoutedHost, ips=['2000::9902/120'], gateway='2000::9901')
             self.addLink(r2, rh2v6)
 
             # Another external IPv6 Host behind r1
@@ -348,12 +349,12 @@
             self.addLink(cs1, self.leafs[4])
             if ipv4:
                 dhcp4 = self.addHost( 'dhcp', cls=TrellisHost,
-                                      mac="00:bb:00:00:00:01", ips=["10.0.3.253/24"],
+                                      mac="00:cc:00:00:00:01", ips=["10.0.3.253/24"],
                                       gateway="10.0.3.254", dhcpServer=True)
                 self.addLink(dhcp4, cs1, **linkopts)
             if ipv6:
                 dhcp6 = self.addHost( 'dhcp6', cls=TrellisHost,
-                                      mac="00:cc:00:00:00:01", ips=["2000::3fd/120"],
+                                      mac="00:dd:00:00:00:01", ips=["2000::3fd/120"],
                                       gateway="2000::3ff", dhcpServer=True, ipv6=True)
                 self.addLink(dhcp6, cs1, **linkopts)