diff --git a/TestON/tests/OnosCHO/Dependencies/topoSpine.py b/TestON/tests/OnosCHO/Dependencies/topoSpine.py
new file mode 100755
index 0000000..56fe745
--- /dev/null
+++ b/TestON/tests/OnosCHO/Dependencies/topoSpine.py
@@ -0,0 +1,436 @@
+#!/usr/bin/python
+
+from mininet.topo import Topo
+from mininet.net import Mininet
+from mininet.node import Controller, RemoteController, OVSController
+from mininet.node import CPULimitedHost, Host, Node
+from mininet.cli import CLI
+from mininet.log import setLogLevel, info
+from mininet.link import TCLink, Intf
+from subprocess import call
+from mininet.log import setLogLevel
+from mininet.util import dumpNodeConnections
+from mininet.node import ( UserSwitch, OVSSwitch, OVSLegacyKernelSwitch, IVSSwitch )
+
+class spineTopo( Topo ):
+
+    def __init__( self, **opts ):
+        "Create a topology."
+
+        # Initialize Topology
+        Topo.__init__( self, **opts )
+    
+	# add nodes, Leaf switches
+	s1 = self.addSwitch( 's1' )
+	s2 = self.addSwitch( 's2' )
+	s3 = self.addSwitch( 's3' )
+	s4 = self.addSwitch( 's4' )
+	s5 = self.addSwitch( 's5' )
+	s6 = self.addSwitch( 's6' )
+	s7 = self.addSwitch( 's7' )
+	s8 = self.addSwitch( 's8' )
+	s9 = self.addSwitch( 's9' )
+	s10 = self.addSwitch( 's10' )
+	s11 = self.addSwitch( 's11' )
+	s12 = self.addSwitch( 's12' )
+	s13 = self.addSwitch( 's13' )
+	s14 = self.addSwitch( 's14' )
+
+	# add nodes, Spine switches first...
+	s15 = self.addSwitch( 's15' )
+	s16 = self.addSwitch( 's16' )
+	s17 = self.addSwitch( 's17' )
+	s18 = self.addSwitch( 's18' )
+	s19 = self.addSwitch( 's19' )
+	s20 = self.addSwitch( 's20' )
+	s21 = self.addSwitch( 's21' )
+	s22 = self.addSwitch( 's22' )
+	s23 = self.addSwitch( 's23' )
+	s24 = self.addSwitch( 's24' )
+	s25 = self.addSwitch( 's25' )
+	s26 = self.addSwitch( 's26' )
+	s27 = self.addSwitch( 's27' )
+	s28 = self.addSwitch( 's28' )
+	s29 = self.addSwitch( 's29' )
+	s30 = self.addSwitch( 's30' )
+	s31 = self.addSwitch( 's31' )
+	s32 = self.addSwitch( 's32' )
+	s33 = self.addSwitch( 's33' )
+	s34 = self.addSwitch( 's34' )
+	s35 = self.addSwitch( 's35' )
+	s36 = self.addSwitch( 's36' )
+	s37 = self.addSwitch( 's37' )
+	s38 = self.addSwitch( 's38' )
+	s39 = self.addSwitch( 's39' )
+	s40 = self.addSwitch( 's40' )
+	s41 = self.addSwitch( 's41' )
+	s42 = self.addSwitch( 's42' )
+	s43 = self.addSwitch( 's43' )
+	s44 = self.addSwitch( 's44' )
+	s45 = self.addSwitch( 's45' )
+	s46 = self.addSwitch( 's46' )
+	s47 = self.addSwitch( 's47' )
+	s48 = self.addSwitch( 's48' )
+	s49 = self.addSwitch( 's49' )
+	s50 = self.addSwitch( 's50' )
+	s51 = self.addSwitch( 's51' )
+	s52 = self.addSwitch( 's52' )
+	s53 = self.addSwitch( 's53' )
+	s54 = self.addSwitch( 's54' )
+	s55 = self.addSwitch( 's55' )
+	s56 = self.addSwitch( 's56' )
+	s57 = self.addSwitch( 's57' )
+	s58 = self.addSwitch( 's58' )
+	s59 = self.addSwitch( 's59' )
+	s60 = self.addSwitch( 's60' )
+	s61 = self.addSwitch( 's61' )
+	s62 = self.addSwitch( 's62' )
+	s63 = self.addSwitch( 's63' )
+	s64 = self.addSwitch( 's64' )
+	s65 = self.addSwitch( 's65' )
+	s66 = self.addSwitch( 's66' )
+	s67 = self.addSwitch( 's67' )
+	s68 = self.addSwitch( 's68' )
+	s69 = self.addSwitch( 's69' )
+	s70 = self.addSwitch( 's70' )
+	s71 = self.addSwitch( 's71' )
+	s72 = self.addSwitch( 's72' )
+	s73 = self.addSwitch( 's73' )
+	s74 = self.addSwitch( 's74' )
+	s75 = self.addSwitch( 's75' )
+	s76 = self.addSwitch( 's76' )
+	s77 = self.addSwitch( 's77' )
+	s78 = self.addSwitch( 's78' )
+
+	# ... and now hosts
+	#s1_host = self.addHost( 'h1' )
+	#s2_host = self.addHost( 'h2' )
+	#s3_host = self.addHost( 'h3' )
+	#s4_host = self.addHost( 'h4' )
+	#s5_host = self.addHost( 'h5' )
+	#s6_host = self.addHost( 'h6' )
+	#s7_host = self.addHost( 'h7' )
+	#s8_host = self.addHost( 'h8' )
+	#s9_host = self.addHost( 'h9' )
+	#s10_host = self.addHost( 'h10' )
+	s11_host = self.addHost( 'h11' )
+	s12_host = self.addHost( 'h12' )
+	s13_host = self.addHost( 'h13' )
+	s14_host = self.addHost( 'h14' )
+	s15_host = self.addHost( 'h15' )
+	s16_host = self.addHost( 'h16' )
+	s17_host = self.addHost( 'h17' )
+	s18_host = self.addHost( 'h18' )
+	s19_host = self.addHost( 'h19' )
+	s20_host = self.addHost( 'h20' )
+	s21_host = self.addHost( 'h21' )
+	s22_host = self.addHost( 'h22' )
+	s23_host = self.addHost( 'h23' )
+	s24_host = self.addHost( 'h24' )
+	s25_host = self.addHost( 'h25' )
+	s26_host = self.addHost( 'h26' )
+	s27_host = self.addHost( 'h27' )
+	s28_host = self.addHost( 'h28' )
+	s29_host = self.addHost( 'h29' )
+	s30_host = self.addHost( 'h30' )
+	s31_host = self.addHost( 'h31' )
+	s32_host = self.addHost( 'h32' )
+	s33_host = self.addHost( 'h33' )
+	s34_host = self.addHost( 'h34' )
+	s35_host = self.addHost( 'h35' )
+	s36_host = self.addHost( 'h36' )
+	s37_host = self.addHost( 'h37' )
+	s38_host = self.addHost( 'h38' )
+	s39_host = self.addHost( 'h39' )
+	s40_host = self.addHost( 'h40' )
+	s41_host = self.addHost( 'h41' )
+	s42_host = self.addHost( 'h42' )
+	s43_host = self.addHost( 'h43' )
+	s44_host = self.addHost( 'h44' )
+	s45_host = self.addHost( 'h45' )
+	s46_host = self.addHost( 'h46' )
+	s47_host = self.addHost( 'h47' )
+	s48_host = self.addHost( 'h48' )
+	s49_host = self.addHost( 'h49' )
+	s50_host = self.addHost( 'h50' )
+	s51_host = self.addHost( 'h51' )
+	s52_host = self.addHost( 'h52' )
+	s53_host = self.addHost( 'h53' )
+	s54_host = self.addHost( 'h54' )
+	s55_host = self.addHost( 'h55' )
+	s56_host = self.addHost( 'h56' )
+	s57_host = self.addHost( 'h57' )
+	s58_host = self.addHost( 'h58' )
+	s59_host = self.addHost( 'h59' )
+	s60_host = self.addHost( 'h60' )
+	s61_host = self.addHost( 'h61' )
+	s62_host = self.addHost( 'h62' )
+	s63_host = self.addHost( 'h63' )
+	s64_host = self.addHost( 'h64' )
+	s65_host = self.addHost( 'h65' )
+	s66_host = self.addHost( 'h66' )
+	s67_host = self.addHost( 'h67' )
+	s68_host = self.addHost( 'h68' )
+	s69_host = self.addHost( 'h69' )
+	s70_host = self.addHost( 'h70' )
+	s71_host = self.addHost( 'h71' )
+	s72_host = self.addHost( 'h72' )
+	s73_host = self.addHost( 'h73' )
+	s74_host = self.addHost( 'h74' )
+	s75_host = self.addHost( 'h75' )
+	s76_host = self.addHost( 'h76' )
+	s77_host = self.addHost( 'h77' )
+	s78_host = self.addHost( 'h78' )
+
+	# add edges between switch and corresponding host
+	#self.addLink( s1 , s1_host )
+	#self.addLink( s2 , s2_host )
+	#self.addLink( s3 , s3_host )
+	#self.addLink( s4 , s4_host )
+	#self.addLink( s5 , s5_host )
+	#self.addLink( s6 , s6_host )
+	#self.addLink( s7 , s7_host )
+	#self.addLink( s8 , s8_host )
+	#self.addLink( s9 , s9_host )
+	#self.addLink( s10 , s10_host )
+	self.addLink( s11 , s11_host )
+	self.addLink( s12 , s12_host )
+	self.addLink( s13 , s13_host )
+	self.addLink( s14 , s14_host )
+	self.addLink( s15 , s15_host )
+	self.addLink( s16 , s16_host )
+	self.addLink( s17 , s17_host )
+	self.addLink( s18 , s18_host )
+	self.addLink( s19 , s19_host )
+	self.addLink( s20 , s20_host )
+	self.addLink( s21 , s21_host )
+	self.addLink( s22 , s22_host )
+	self.addLink( s23 , s23_host )
+	self.addLink( s24 , s24_host )
+	self.addLink( s25 , s25_host )
+	self.addLink( s26 , s26_host )
+	self.addLink( s27 , s27_host )
+	self.addLink( s28 , s28_host )
+	self.addLink( s29 , s29_host )
+	self.addLink( s30 , s30_host )
+	self.addLink( s31 , s31_host )
+	self.addLink( s32 , s32_host )
+	self.addLink( s33 , s33_host )
+	self.addLink( s34 , s34_host )
+	self.addLink( s35 , s35_host )
+	self.addLink( s36 , s36_host )
+	self.addLink( s37 , s37_host )
+	self.addLink( s38 , s38_host )
+	self.addLink( s39 , s39_host )
+	self.addLink( s40 , s40_host )
+	self.addLink( s41 , s41_host )
+	self.addLink( s42 , s42_host )
+	self.addLink( s43 , s43_host )
+	self.addLink( s44 , s44_host )
+	self.addLink( s45 , s45_host )
+	self.addLink( s46 , s46_host )
+	self.addLink( s47 , s47_host )
+	self.addLink( s48 , s48_host )
+	self.addLink( s49 , s49_host )
+	self.addLink( s50 , s50_host )
+	self.addLink( s51 , s51_host )
+	self.addLink( s52 , s52_host )
+	self.addLink( s53 , s53_host )
+	self.addLink( s54 , s54_host )
+	self.addLink( s55 , s55_host )
+	self.addLink( s56 , s56_host )
+	self.addLink( s57 , s57_host )
+	self.addLink( s58 , s58_host )
+	self.addLink( s59 , s59_host )
+	self.addLink( s60 , s60_host )
+	self.addLink( s61 , s61_host )
+	self.addLink( s62 , s62_host )
+	self.addLink( s63 , s63_host )
+	self.addLink( s64 , s64_host )
+	self.addLink( s65 , s65_host )
+	self.addLink( s66 , s66_host )
+	self.addLink( s67 , s67_host )
+	self.addLink( s68 , s68_host )
+	self.addLink( s69 , s69_host )
+	self.addLink( s70 , s70_host )
+	self.addLink( s71 , s71_host )
+	self.addLink( s72 , s72_host )
+	self.addLink( s73 , s73_host )
+	self.addLink( s74 , s74_host )
+	self.addLink( s75 , s75_host )
+	self.addLink( s76 , s76_host )
+	self.addLink( s77 , s77_host )
+	self.addLink( s78 , s78_host )
+
+	#info( '*** Add Leaf links\n')
+	self.addLink(s1, s9)
+	self.addLink(s2, s10)
+	self.addLink(s3, s9)
+	self.addLink(s4, s10)
+	self.addLink(s5, s9)
+	self.addLink(s6, s10)
+	self.addLink(s7, s9)
+	self.addLink(s8, s10)
+	self.addLink(s9, s11)
+	self.addLink(s9, s12)
+	self.addLink(s10, s13)
+	self.addLink(s10, s14)
+	self.addLink(s11, s12)
+	self.addLink(s13, s14)
+
+	#info( '*** Add Spine-1 links\n')
+	self.addLink(s15, s1)
+	self.addLink(s15, s2)
+	self.addLink(s16, s1)
+	self.addLink(s16, s2)
+	self.addLink(s17, s1)
+	self.addLink(s17, s2)
+	self.addLink(s18, s1)
+	self.addLink(s18, s2)
+	self.addLink(s19, s1)
+	self.addLink(s19, s2)
+	self.addLink(s20, s1)
+	self.addLink(s20, s2)
+	self.addLink(s21, s1)
+	self.addLink(s21, s2)
+	self.addLink(s22, s1)
+	self.addLink(s22, s2)
+	self.addLink(s23, s1)
+	self.addLink(s23, s2)
+	self.addLink(s24, s1)
+	self.addLink(s24, s2)
+	self.addLink(s25, s1)
+	self.addLink(s25, s2)
+	self.addLink(s26, s1)
+	self.addLink(s26, s2)
+	self.addLink(s27, s1)
+	self.addLink(s27, s2)
+	self.addLink(s28, s1)
+	self.addLink(s28, s2)
+	self.addLink(s29, s1)
+	self.addLink(s29, s2)
+	self.addLink(s30, s1)
+	self.addLink(s30, s2)
+
+	#info( '*** Add Spine-2 links\n')
+	self.addLink(s31, s3)
+	self.addLink(s31, s4)
+	self.addLink(s32, s3)
+	self.addLink(s32, s4)
+	self.addLink(s33, s3)
+	self.addLink(s33, s4)
+	self.addLink(s34, s3)
+	self.addLink(s34, s4)
+	self.addLink(s35, s3)
+	self.addLink(s35, s4)
+	self.addLink(s36, s3)
+	self.addLink(s36, s4)
+	self.addLink(s37, s3)
+	self.addLink(s37, s4)
+	self.addLink(s38, s3)
+	self.addLink(s38, s4)
+	self.addLink(s39, s3)
+	self.addLink(s39, s4)
+	self.addLink(s40, s3)
+	self.addLink(s40, s4)
+	self.addLink(s41, s3)
+	self.addLink(s41, s4)
+	self.addLink(s42, s3)
+	self.addLink(s42, s4)
+	self.addLink(s43, s3)
+	self.addLink(s43, s4)
+	self.addLink(s44, s3)
+	self.addLink(s44, s4)
+	self.addLink(s45, s3)
+	self.addLink(s45, s4)
+	self.addLink(s46, s3)
+	self.addLink(s46, s4)
+
+	#info( '*** Add Spine-3 links\n')
+	self.addLink(s47, s5)
+	self.addLink(s47, s6)
+	self.addLink(s48, s5)
+	self.addLink(s48, s6)
+	self.addLink(s49, s5)
+	self.addLink(s49, s6)
+	self.addLink(s50, s5)
+	self.addLink(s50, s6)
+	self.addLink(s51, s5)
+	self.addLink(s51, s6)
+	self.addLink(s52, s5)
+	self.addLink(s52, s6)
+	self.addLink(s53, s5)
+	self.addLink(s53, s6)
+	self.addLink(s54, s5)
+	self.addLink(s54, s6)
+	self.addLink(s55, s5)
+	self.addLink(s55, s6)
+	self.addLink(s56, s5)
+	self.addLink(s56, s6)
+	self.addLink(s57, s5)
+	self.addLink(s57, s6)
+	self.addLink(s58, s5)
+	self.addLink(s58, s6)
+	self.addLink(s59, s5)
+	self.addLink(s59, s6)
+	self.addLink(s60, s5)
+	self.addLink(s60, s6)
+	self.addLink(s61, s5)
+	self.addLink(s61, s6)
+	self.addLink(s62, s5)
+	self.addLink(s62, s6)
+
+	#info( '*** Add Spine-4 links\n')
+	self.addLink(s63, s7)
+	self.addLink(s63, s8)
+	self.addLink(s64, s7)
+	self.addLink(s64, s8)
+	self.addLink(s65, s7)
+	self.addLink(s65, s8)
+	self.addLink(s66, s7)
+	self.addLink(s66, s8)
+	self.addLink(s67, s7)
+	self.addLink(s67, s8)
+	self.addLink(s68, s7)
+	self.addLink(s68, s8)
+	self.addLink(s69, s7)
+	self.addLink(s69, s8)
+	self.addLink(s70, s7)
+	self.addLink(s70, s8)
+	self.addLink(s71, s7)
+	self.addLink(s71, s8)
+	self.addLink(s72, s7)
+	self.addLink(s72, s8)
+	self.addLink(s73, s7)
+	self.addLink(s73, s8)
+	self.addLink(s74, s7)
+	self.addLink(s74, s8)
+	self.addLink(s75, s7)
+	self.addLink(s75, s8)
+	self.addLink(s76, s7)
+	self.addLink(s76, s8)
+	self.addLink(s77, s7)
+	self.addLink(s77, s8)
+	self.addLink(s78, s7)
+	self.addLink(s78, s8)
+
+topos = { 'spine': ( lambda: spineTopo() ) }
+
+# HERE THE CODE DEFINITION OF THE TOPOLOGY ENDS
+
+def setupNetwork():
+    "Create network"
+    topo = spineTopo()
+    #if controller_ip == '':
+        #controller_ip = '10.0.2.2';
+    #    controller_ip = '127.0.0.1';
+    network = Mininet(topo=topo, switch=OVSSwitch, link=TCLink, autoSetMacs = True, controller=None)
+    network.start()
+    CLI( network )
+    network.stop()
+
+if __name__ == '__main__':
+    setLogLevel('info')
+    #setLogLevel('debug')
+    setupNetwork()
+