Restored treeping64 and tre1024 examples and updated README.

examples/treeping64.py

@@ -0,0 +1,38 @@
+#!/usr/bin/python
+
+"Create a 64-node tree network, and test connectivity using ping."
+   
+from mininet.cli import CLI
+from mininet.log import setLogLevel
+from mininet.net import init, Mininet
+from mininet.node import KernelSwitch, UserSwitch, OVSKernelSwitch
+from mininet.topolib import TreeTopo
+
+def TreeNet( depth=1, fanout=2, **kwargs ):
+    "Convenience function for creating tree networks."
+    topo = TreeTopo( depth, fanout )
+    return Mininet( topo, **kwargs )
+    
+def treePing64():
+    results = {}
+    switches = { 'reference kernel': KernelSwitch,
+        'reference user': UserSwitch,
+        'Open vSwitch kernel': OVSKernelSwitch }
+
+    for name in switches.keys():
+        print "*** Testing", name, "datapath"
+        switch = switches[ name ]
+        network = TreeNet( depth=2, fanout=8, switch=switch )
+        result = network.run( network.pingAll )
+        results[ name ] = result
+
+    print  
+    print "*** Tree network ping results:"
+    for name in switches.keys():
+        print "%s: %d%% packet loss" % ( name, results[ name ] )
+    print
+   
+if __name__ == '__main__':
+   setLogLevel( 'info' )
+   init()
+   treePing64()