diff --git a/TestON/tests/CHOtest/Dependencies/topoAttIpv6.py b/TestON/tests/CHOtest/Dependencies/topoAttIpv6.py
new file mode 100755
index 0000000..c5ca4c7
--- /dev/null
+++ b/TestON/tests/CHOtest/Dependencies/topoAttIpv6.py
@@ -0,0 +1,190 @@
+#!/usr/bin/python
+
+"""
+Custom topology for Mininet
+"""
+from mininet.topo import Topo
+from mininet.net import Mininet
+from mininet.node import Host, RemoteController
+from mininet.node import Node
+from mininet.node import CPULimitedHost
+from mininet.link import TCLink
+from mininet.cli import CLI
+from mininet.log import setLogLevel
+from mininet.util import dumpNodeConnections
+from mininet.node import ( UserSwitch, OVSSwitch, IVSSwitch )
+
+class dualStackHost( Host ):
+    def config( self, v6Addr='1000:1/64', **params ):
+        r = super( Host, self ).config( **params )
+        intf = self.defaultIntf()
+        self.cmd( 'ip -6 addr add %s dev %s' % ( v6Addr, intf ) )
+        return r
+
+class attTopo( Topo ):
+
+    def __init__( self, **opts ):
+        "Create a topology."
+
+        # Initialize Topology
+        Topo.__init__( self, **opts )
+
+        # add nodes, switches first...
+        NY54 = self.addSwitch( 's1' )
+        CMBR = self.addSwitch( 's2' )
+        CHCG = self.addSwitch( 's3' )
+        CLEV = self.addSwitch( 's4' )
+        RLGH = self.addSwitch( 's5' )
+        ATLN = self.addSwitch( 's6' )
+        PHLA = self.addSwitch( 's7' )
+        WASH = self.addSwitch( 's8' )
+        NSVL = self.addSwitch( 's9' )
+        STLS = self.addSwitch( 's10' )
+        NWOR = self.addSwitch( 's11' )
+        HSTN = self.addSwitch( 's12' )
+        SNAN = self.addSwitch( 's13' )
+        DLLS = self.addSwitch( 's14' )
+        ORLD = self.addSwitch( 's15' )
+        DNVR = self.addSwitch( 's16' )
+        KSCY = self.addSwitch( 's17' )
+        SNFN = self.addSwitch( 's18' )
+        SCRM = self.addSwitch( 's19' )
+        PTLD = self.addSwitch( 's20' )
+        STTL = self.addSwitch( 's21' )
+        SLKC = self.addSwitch( 's22' )
+        LA03 = self.addSwitch( 's23' )
+        SNDG = self.addSwitch( 's24' )
+        PHNX = self.addSwitch( 's25' )
+
+        # ... and now hosts
+        NY54_host = self.addHost( 'h1', ip='10.1.0.1/24', cls=dualStackHost, v6Addr='1000::1/64' )
+        CMBR_host = self.addHost( 'h2', ip='10.1.0.2/24', cls=dualStackHost, v6Addr='1000::2/64' )
+        CHCG_host = self.addHost( 'h3', ip='10.1.0.3/24', cls=dualStackHost, v6Addr='1000::3/64' )
+        CLEV_host = self.addHost( 'h4', ip='10.1.0.4/24', cls=dualStackHost, v6Addr='1000::4/64' )
+        RLGH_host = self.addHost( 'h5', ip='10.1.0.5/24', cls=dualStackHost, v6Addr='1000::5/64' )
+        ATLN_host = self.addHost( 'h6', ip='10.1.0.6/24', cls=dualStackHost, v6Addr='1000::6/64' )
+        PHLA_host = self.addHost( 'h7', ip='10.1.0.7/24', cls=dualStackHost, v6Addr='1000::7/64' )
+        WASH_host = self.addHost( 'h8', ip='10.1.0.8/24', cls=dualStackHost, v6Addr='1000::8/64' )
+        NSVL_host = self.addHost( 'h9', ip='10.1.0.9/24', cls=dualStackHost, v6Addr='1000::9/64' )
+        STLS_host = self.addHost( 'h10', ip='10.1.0.10/24', cls=dualStackHost, v6Addr='1000::10/64' )
+        NWOR_host = self.addHost( 'h11', ip='10.1.0.11/24', cls=dualStackHost, v6Addr='1000::11/64' )
+        HSTN_host = self.addHost( 'h12', ip='10.1.0.12/24', cls=dualStackHost, v6Addr='1000::12/64' )
+        SNAN_host = self.addHost( 'h13', ip='10.1.0.13/24', cls=dualStackHost, v6Addr='1000::13/64' )
+        DLLS_host = self.addHost( 'h14', ip='10.1.0.14/24', cls=dualStackHost, v6Addr='1000::14/64' )
+        ORLD_host = self.addHost( 'h15', ip='10.1.0.15/24', cls=dualStackHost, v6Addr='1000::15/64' )
+        DNVR_host = self.addHost( 'h16', ip='10.1.0.16/24', cls=dualStackHost, v6Addr='1000::16/64' )
+        KSCY_host = self.addHost( 'h17', ip='10.1.0.17/24', cls=dualStackHost, v6Addr='1000::17/64' )
+        SNFN_host = self.addHost( 'h18', ip='10.1.0.18/24', cls=dualStackHost, v6Addr='1000::18/64' )
+        SCRM_host = self.addHost( 'h19', ip='10.1.0.19/24', cls=dualStackHost, v6Addr='1000::19/64' )
+        PTLD_host = self.addHost( 'h20', ip='10.1.0.20/24', cls=dualStackHost, v6Addr='1000::20/64' )
+        STTL_host = self.addHost( 'h21', ip='10.1.0.21/24', cls=dualStackHost, v6Addr='1000::21/64' )
+        SLKC_host = self.addHost( 'h22', ip='10.1.0.22/24', cls=dualStackHost, v6Addr='1000::22/64' )
+        LA03_host = self.addHost( 'h23', ip='10.1.0.23/24', cls=dualStackHost, v6Addr='1000::23/64' )
+        SNDG_host = self.addHost( 'h24', ip='10.1.0.24/24', cls=dualStackHost, v6Addr='1000::24/64' )
+        PHNX_host = self.addHost( 'h25', ip='10.1.0.25/24', cls=dualStackHost, v6Addr='1000::25/64' )
+
+        # add edges between switch and corresponding host
+        self.addLink( NY54 , NY54_host )
+        self.addLink( CMBR , CMBR_host )
+        self.addLink( CHCG , CHCG_host )
+        self.addLink( CLEV , CLEV_host )
+        self.addLink( RLGH , RLGH_host )
+        self.addLink( ATLN , ATLN_host )
+        self.addLink( PHLA , PHLA_host )
+        self.addLink( WASH , WASH_host )
+        self.addLink( NSVL , NSVL_host )
+        self.addLink( STLS , STLS_host )
+        self.addLink( NWOR , NWOR_host )
+        self.addLink( HSTN , HSTN_host )
+        self.addLink( SNAN , SNAN_host )
+        self.addLink( DLLS , DLLS_host )
+        self.addLink( ORLD , ORLD_host )
+        self.addLink( DNVR , DNVR_host )
+        self.addLink( KSCY , KSCY_host )
+        self.addLink( SNFN , SNFN_host )
+        self.addLink( SCRM , SCRM_host )
+        self.addLink( PTLD , PTLD_host )
+        self.addLink( STTL , STTL_host )
+        self.addLink( SLKC , SLKC_host )
+        self.addLink( LA03 , LA03_host )
+        self.addLink( SNDG , SNDG_host )
+        self.addLink( PHNX , PHNX_host )
+
+        # add edges between switches
+        self.addLink( NY54 , CMBR, bw=10, delay='0.979030824185ms')
+        self.addLink( NY54 , CHCG, bw=10, delay='0.806374975652ms')
+        self.addLink( NY54 , PHLA, bw=10, delay='0.686192970166ms')
+        self.addLink( NY54 , WASH, bw=10, delay='0.605826192092ms')
+        self.addLink( CMBR , PHLA, bw=10, delay='1.4018238197ms')
+        self.addLink( CHCG , CLEV, bw=10, delay='0.232315346482ms')
+        self.addLink( CHCG , PHLA, bw=10, delay='1.07297714274ms')
+        self.addLink( CHCG , STLS, bw=10, delay='1.12827896944ms')
+        self.addLink( CHCG , DNVR, bw=10, delay='1.35964770335ms')
+        self.addLink( CHCG , KSCY, bw=10, delay='1.5199778541ms')
+        self.addLink( CHCG , SNFN, bw=10, delay='0.620743405435ms')
+        self.addLink( CHCG , STTL, bw=10, delay='0.93027212534ms')
+        self.addLink( CHCG , SLKC, bw=10, delay='0.735621751348ms')
+        self.addLink( CLEV , NSVL, bw=10, delay='0.523419372248ms')
+        self.addLink( CLEV , STLS, bw=10, delay='1.00360290845ms')
+        self.addLink( CLEV , PHLA, bw=10, delay='0.882912133249ms')
+        self.addLink( RLGH , ATLN, bw=10, delay='1.1644489729ms')
+        self.addLink( RLGH , WASH, bw=10, delay='1.48176810502ms')
+        self.addLink( ATLN , WASH, bw=10, delay='0.557636936322ms')
+        self.addLink( ATLN , NSVL, bw=10, delay='1.32869749865ms')
+        self.addLink( ATLN , STLS, bw=10, delay='0.767705554748ms')
+        self.addLink( ATLN , DLLS, bw=10, delay='0.544782086448ms')
+        self.addLink( ATLN , ORLD, bw=10, delay='1.46119152532ms')
+        self.addLink( PHLA , WASH, bw=10, delay='0.372209320106ms')
+        self.addLink( NSVL , STLS, bw=10, delay='1.43250491305ms')
+        self.addLink( NSVL , DLLS, bw=10, delay='1.67698215288ms')
+        self.addLink( STLS , DLLS, bw=10, delay='0.256389964194ms')
+        self.addLink( STLS , KSCY, bw=10, delay='0.395511571791ms')
+        self.addLink( STLS , LA03, bw=10, delay='0.257085227363ms')
+        self.addLink( NWOR , HSTN, bw=10, delay='0.0952906633914ms')
+        self.addLink( NWOR , DLLS, bw=10, delay='1.60231329739ms')
+        self.addLink( NWOR , ORLD, bw=10, delay='0.692731063896ms')
+        self.addLink( HSTN , SNAN, bw=10, delay='0.284150653798ms')
+        self.addLink( HSTN , DLLS, bw=10, delay='1.65690128332ms')
+        self.addLink( HSTN , ORLD, bw=10, delay='0.731886304782ms')
+        self.addLink( SNAN , PHNX, bw=10, delay='1.34258627257ms')
+        self.addLink( SNAN , DLLS, bw=10, delay='1.50063532341ms')
+        self.addLink( DLLS , DNVR, bw=10, delay='0.251471593235ms')
+        self.addLink( DLLS , KSCY, bw=10, delay='0.18026026737ms')
+        self.addLink( DLLS , SNFN, bw=10, delay='0.74304274592ms')
+        self.addLink( DLLS , LA03, bw=10, delay='0.506439293357ms')
+        self.addLink( DNVR , KSCY, bw=10, delay='0.223328790403ms')
+        self.addLink( DNVR , SNFN, bw=10, delay='0.889017541903ms')
+        self.addLink( DNVR , SLKC, bw=10, delay='0.631898982721ms')
+        self.addLink( KSCY , SNFN, bw=10, delay='0.922778522233ms')
+        self.addLink( SNFN , SCRM, bw=10, delay='0.630352278097ms')
+        self.addLink( SNFN , PTLD, bw=10, delay='0.828572513655ms')
+        self.addLink( SNFN , STTL, bw=10, delay='1.54076081649ms')
+        self.addLink( SNFN , SLKC, bw=10, delay='0.621507502625ms')
+        self.addLink( SNFN , LA03, bw=10, delay='0.602936230151ms')
+        self.addLink( SCRM , SLKC, bw=10, delay='0.461350343644ms')
+        self.addLink( PTLD , STTL, bw=10, delay='1.17591515181ms')
+        self.addLink( SLKC , LA03, bw=10, delay='0.243225267023ms')
+        self.addLink( LA03 , SNDG, bw=10, delay='0.681264950821ms')
+        self.addLink( LA03 , PHNX, bw=10, delay='0.343709457969ms')
+        self.addLink( LA03 , PHNX, bw=10, delay='0.343709457969ms')
+        self.addLink( SNDG , PHNX, bw=10, delay='0.345064487693ms')
+
+topos = { 'att': ( lambda: attTopo() ) }
+
+# HERE THE CODE DEFINITION OF THE TOPOLOGY ENDS
+
+def setupNetwork():
+    "Create network"
+    topo = attTopo()
+    #if controller_ip == '':
+        #controller_ip = '10.0.2.2';
+    #    controller_ip = '127.0.0.1';
+    network = Mininet(topo=topo, link=TCLink, autoSetMacs=True, controller=None)
+    network.start()
+    CLI( network )
+    network.stop()
+
+if __name__ == '__main__':
+    setLogLevel('info')
+    #setLogLevel('debug')
+    setupNetwork()