Bob Lantz
ee15ce2243
Although we could use print() from __future__, this messes up scripts which use examples as modules. The simple, if not nicest for 2.7, solution is to use info(), output() and other mininet.log functions. The disadvantage is that we may have to adjust things if we change info() to add automatic newlines, but we can burn that bridge in Mininet 3.x.
63 lines
1.6 KiB
Python
Executable File
63 lines
1.6 KiB
Python
Executable File
#!/usr/bin/python
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"""
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This example creates a multi-controller network from semi-scratch by
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using the net.add*() API and manually starting the switches and controllers.
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This is the "mid-level" API, which is an alternative to the "high-level"
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Topo() API which supports parametrized topology classes.
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Note that one could also create a custom switch class and pass it into
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the Mininet() constructor.
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"""
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from mininet.net import Mininet
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from mininet.node import Controller, OVSSwitch
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from mininet.cli import CLI
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from mininet.log import setLogLevel, info
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def multiControllerNet():
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"Create a network from semi-scratch with multiple controllers."
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net = Mininet( controller=Controller, switch=OVSSwitch )
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info( "*** Creating (reference) controllers\n" )
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c1 = net.addController( 'c1', port=6633 )
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c2 = net.addController( 'c2', port=6634 )
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info( "*** Creating switches\n" )
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s1 = net.addSwitch( 's1' )
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s2 = net.addSwitch( 's2' )
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info( "*** Creating hosts\n" )
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hosts1 = [ net.addHost( 'h%d' % n ) for n in ( 3, 4 ) ]
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hosts2 = [ net.addHost( 'h%d' % n ) for n in ( 5, 6 ) ]
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info( "*** Creating links\n" )
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for h in hosts1:
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net.addLink( s1, h )
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for h in hosts2:
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net.addLink( s2, h )
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net.addLink( s1, s2 )
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info( "*** Starting network\n" )
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net.build()
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c1.start()
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c2.start()
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s1.start( [ c1 ] )
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s2.start( [ c2 ] )
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info( "*** Testing network\n" )
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net.pingAll()
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info( "*** Running CLI\n" )
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CLI( net )
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info( "*** Stopping network\n" )
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net.stop()
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if __name__ == '__main__':
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setLogLevel( 'info' ) # for CLI output
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multiControllerNet()
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