OK, now we run 'routing' for the nox configurations with loops.

Unfortunately, I can't test this at the moment since nox seems not to
be able to find the routing module.

Added/renamed examples: grid.py, tree1024.py

Added -v flag to nox arguments, so we have some chance of figuring
out why nox is dying, as it generally is.

examples/grid.py

@@ -0,0 +1,17 @@
+#!/usr/bin/python
+
+"Instantiate a Grid network and use NOX as the controller."
+
+from mininet import init, Controller, GridNet, Cli
+
+class NoxController( Controller ):
+   def __init__( self, name, **kwargs ):
+      Controller.__init__( self, name, 
+         controller='nox_core', 
+         cargs='-v --libdir=/usr/local/lib -i ptcp: routing', 
+         cdir='/usr/local/bin', **kwargs)
+   
+if __name__ == '__main__':
+   init()   
+   network = GridNet( 2, 2, kernel=True, Controller=NoxController)
+   network.run( Cli )

examples/ripcordtest.py

@@ -9,10 +9,10 @@ from mininet import init, Controller, Network, Host, nameGen, Cli
 from mininet import createLink, flush
 
 class NoxController( Controller ):
-   "A customized Controller that uses NOX."
-   def __init__( self, name, **kwargs ):
-      Controller.__init__( self, name, 
-         controller='nox_core', cargs='-i ptcp pyswitch', 
+   def __init__( self, name, kernel=False **kwargs ):
+      Controller.__init__( self, name, kernel=kernel,
+         controller='nox_core', 
+         cargs='-v --libdir=/usr/local/lib -i ptcp: routing', 
          cdir='/usr/local/bin', **kwargs)
    
 class FatTree( Network ):

examples/tree1024.py

@@ -0,0 +1,15 @@
+#!/usr/bin/python
+
+"""
+Create a 1024-host network, and run the CLI on it.
+If this fails because of kernel limits, you may have
+to adjust them, e.g. by adding entries to /etc/sysctl.conf
+and running sysctl -p.
+"""
+   
+from mininet import init, TreeNet
+
+if __name__ == '__main__':
+   init()
+   network = TreeNet( depth=2, fanout=32, kernel=True )
+   network.run( Cli )