diff --git a/tools/test/topos/optical2.py b/tools/test/topos/optical2.py
new file mode 100644
index 0000000..8d171d6
--- /dev/null
+++ b/tools/test/topos/optical2.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python
+
+''' file: custom/optical.py '''
+
+from mininet.topo import Topo
+from mininet.net import Mininet
+from mininet.cli import CLI
+from mininet.log import setLogLevel, info
+from mininet.link import Intf, Link
+from mininet.node import RemoteController
+
+class NullIntf( Intf ):
+    "A dummy interface with a blank name that doesn't do any configuration"
+    def __init__( self, name, **params ):
+        self.name = ''
+
+class NullLink( Link ):
+    "A dummy link that doesn't touch either interface"
+    def makeIntfPair( cls, intf1, intf2 ):
+        pass
+    def delete( self ):
+        pass
+
+class OpticalTopo(Topo):
+    def addIntf( self, switch, intfName ):
+        "Add intf intfName to switch"
+        self.addLink( switch, switch, cls=NullLink,
+                      intfName1=intfName, cls2=NullIntf )
+    def __init__(self):
+
+        # Initialize topology
+        Topo.__init__(self)
+
+        # Add hosts and switches
+        h1 = self.addHost('h1')
+        h2 = self.addHost('h2')
+        h3 = self.addHost('h3')
+        h4 = self.addHost('h4')
+        h5 = self.addHost('h5')
+        h6 = self.addHost('h6')
+
+        s1 = self.addSwitch('s1',dpid="0000ffffffff0001")
+        s2 = self.addSwitch('s2',dpid="0000ffffffff0002")
+        s3 = self.addSwitch('s3',dpid="0000ffffffff0003")
+        s4 = self.addSwitch('s4',dpid="0000ffffffff0004")
+        s5 = self.addSwitch('s5',dpid="0000ffffffff0005")
+        s6 = self.addSwitch('s6',dpid="0000ffffffff0006")
+
+
+        # Add links from hosts to OVS
+        self.addLink(s1, h1)
+        self.addLink(s2, h2)
+        self.addLink(s3, h3)
+        self.addLink(s4, h4)
+        self.addLink(s5, h5)
+        self.addLink(s6, h6)
+
+        # temporary packet link from s1 to s2 for testing
+        # self.addLink( s1, s2 )
+
+        # add links from ovs to linc-oe
+        # sorry about the syntax :(
+        self.addLink(s1, s1, intfName1='s1-eth0', intfName2='tap29')
+        self.addLink(s2, s2, intfName1='s2-eth0', intfName2='tap30')
+        self.addLink(s3, s3, intfName1='s3-eth0', intfName2='tap31')
+        self.addLink(s4, s4, intfName1='s4-eth0', intfName2='tap32')
+        self.addLink(s5, s5, intfName1='s5-eth0', intfName2='tap33')
+        self.addLink(s6, s6, intfName1='s6-eth0', intfName2='tap34')
+
+        #self.addLink(s1, s2, s3, s4, s5, s6)
+        #intfName1 = 'tap3', intfName\2 = 'tap4', intfName2 = 'tap5',
+        # intfName2 = 'tap6', intfName2 = 'tap7', intfName2 = 'tap8'
+
+    # if you use, sudo mn --custom custom/optical.py, then register the topo:
+topos = {'optical': ( lambda: OpticalTopo() )}
+
+def installStaticFlows(net):
+    for swName in ['s1', 's2', 's3', 's4', 's5', 's6']:
+        info('Adding flows to %s...' % swName)
+        sw = net[swName]
+        sw.dpctl('add-flow', 'in_port=1,actions=output=2')
+        sw.dpctl('add-flow', 'in_port=2,actions=output=1')
+        info(sw.dpctl('dump-flows'))
+
+
+def run():
+    c = RemoteController('c','10.1.8.147',6633)
+    net = Mininet( topo=OpticalTopo(),controller=None)
+    net.addController(c)
+    net.start()
+
+    # intf1 = Intf( 'tap3', node=net.nameToNode['s1'] )
+    # intf2 = Intf( 'tap4', node=net.nameToNode['s2'] )
+    # net.nameToNode['s1'].attach( intf1 )
+    # net.nameToNode['s2'].attach( intf2 )
+
+    #installStaticFlows( net )
+    CLI( net )
+    net.stop()
+
+# if the script is run directly (sudo custom/optical.py):
+if __name__ == '__main__':
+    setLogLevel('info')
+    run()