diff --git a/TestON/tests/CHOTestMonkey/dependencies/topologies/topoRingIpv6.py b/TestON/tests/CHOTestMonkey/dependencies/topologies/topoRingIpv6.py
old mode 100755
new mode 100644
index 982840e..09e0691
--- a/TestON/tests/CHOTestMonkey/dependencies/topologies/topoRingIpv6.py
+++ b/TestON/tests/CHOTestMonkey/dependencies/topologies/topoRingIpv6.py
@@ -1,7 +1,7 @@
 #!/usr/bin/python
 
 """
-Copyright 2016 Open Networking Foundation (ONF)
+Copyright 2016 Open Networking Foundation ( ONF )
 
 Please refer questions to either the onos test mailing list at <onos-test@onosproject.org>,
 the System Testing Plans and Results wiki page at <https://wiki.onosproject.org/x/voMg>,
@@ -10,7 +10,7 @@
     TestON is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 2 of the License, or
-    (at your option) any later version.
+    ( at your option ) any later version.
 
     TestON is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -20,7 +20,6 @@
     You should have received a copy of the GNU General Public License
     along with TestON.  If not, see <http://www.gnu.org/licenses/>.
 """
-
 from mininet.topo import Topo
 from mininet.net import Mininet
 from mininet.node import Host, RemoteController
@@ -32,13 +31,16 @@
 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 ringTopo( Topo ):
 
     def __init__( self, **opts ):
@@ -71,43 +73,44 @@
         s10_host = self.addHost( 'h10', ip='10.1.0.10/24', cls=dualStackHost, v6Addr='1000::10/64' )
 
         # 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(s1, s2)
-        self.addLink(s2, s3)
-        self.addLink(s3, s4)
-        self.addLink(s4, s5)
-        self.addLink(s5, s6)
-        self.addLink(s6, s7)
-        self.addLink(s7, s8)
-        self.addLink(s8, s9)
-        self.addLink(s9, s10)
-        self.addLink(s10, s1)
+        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( s1, s2 )
+        self.addLink( s2, s3 )
+        self.addLink( s3, s4 )
+        self.addLink( s4, s5 )
+        self.addLink( s5, s6 )
+        self.addLink( s6, s7 )
+        self.addLink( s7, s8 )
+        self.addLink( s8, s9 )
+        self.addLink( s9, s10 )
+        self.addLink( s10, s1 )
 
 topos = { 'ring': ( lambda: ringTopo() ) }
 
 # HERE THE CODE DEFINITION OF THE TOPOLOGY ENDS
 
+
 def setupNetwork():
     "Create network"
     topo = ringTopo()
-    #if controller_ip == '':
-        #controller_ip = '10.0.2.2';
+    # if controller_ip == '':
+    # controller_ip = '10.0.2.2';
     #    controller_ip = '127.0.0.1';
-    network = Mininet(topo=topo, switch=OVSSwitch, autoSetMacs=True, controller=None)
+    network = Mininet( topo=topo, switch=OVSSwitch, autoSetMacs=True, controller=None )
     network.start()
     CLI( network )
     network.stop()
 
 if __name__ == '__main__':
-    setLogLevel('info')
-    #setLogLevel('debug')
+    setLogLevel( 'info' )
+    # setLogLevel( 'debug' )
     setupNetwork()