1 files changed, 55 insertions, 0 deletions
diff --git a/framework/src/onos/tools/test/topos/tower.py b/framework/src/onos/tools/test/topos/tower.py
new file mode 100755
index 00000000..b75bfe40
--- /dev/null
+++ b/framework/src/onos/tools/test/topos/tower.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+
+from mininet.topo import Topo
+from mininet.cli import CLI
+from mininet.net import Mininet
+from mininet.node import RemoteController, OVSKernelSwitch
+from mininet.log import setLogLevel
+
+
+class TowerTopo( Topo ):
+    """Create a tower topology"""
+
+    def build( self, k=4, h=6 ):
+        spines = []
+        leaves = []
+        hosts = []
+
+        # Create the two spine switches
+        spines.append(self.addSwitch('s1'))
+        spines.append(self.addSwitch('s2'))
+
+        # Create two links between the spine switches
+        self.addLink(spines[0], spines[1])
+        #TODO add second link between spines when multi-link topos are supported
+        #self.addLink(spines[0], spines[1])
+        
+        # Now create the leaf switches, their hosts and connect them together
+        i = 1
+        c = 0
+        while i <= k:
+            leaves.append(self.addSwitch('s1%d' % i))
+            for spine in spines:
+                self.addLink(leaves[i-1], spine)
+
+            j = 1
+            while j <= h:
+                hosts.append(self.addHost('h%d%d' % (i, j)))
+                self.addLink(hosts[c], leaves[i-1])
+                j+=1
+                c+=1
+
+            i+=1
+
+topos = { 'tower': TowerTopo }
+
+def run():
+    topo = TowerTopo()
+    net = Mininet( topo=topo, controller=RemoteController, autoSetMacs=True )
+    net.start()
+    CLI( net )
+    net.stop()
+
+if __name__ == '__main__':
+    setLogLevel( 'info' )
+    run()