Bob Lantz
dc630c540a
Also changed the str format for nodes to use str() rather than repr() so we don't end up with extraneous quotes.
64 lines
2.1 KiB
Python
Executable File
64 lines
2.1 KiB
Python
Executable File
#!/usr/bin/python
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"""
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Build a simple network from scratch, using mininet primitives.
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This is more complicated than using the higher-level classes,
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but it exposes the configuration details and allows customization.
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This version uses the user datapath.
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"""
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from mininet.net import init
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from mininet.node import Node
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from mininet.util import createLink
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from mininet.log import lg, info
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def scratchNetUser( cname='controller', cargs='ptcp:'):
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# Create Network
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# It's not strictly necessary for the controller and switches
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# to be in separate namespaces. For performance, they probably
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# should be in the root namespace. However, it's interesting to
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# see how they could work even if they are in separate namespaces.
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info( '*** Creating Network\n' )
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controller = Node( 'c0' )
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switch = Node( 's0')
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h0 = Node( 'h0' )
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h1 = Node( 'h1' )
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createLink( controller, 0, switch, 0 )
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createLink( h0, 0, switch, 1 )
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createLink( h1, 0, switch, 2 )
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info( '*** Configuring control network\n' )
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controller.setIP( controller.intfs[ 0 ], '10.0.123.1', '/24' )
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switch.setIP( switch.intfs[ 0 ], '10.0.123.2', '/24' )
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info( '*** Configuring hosts\n' )
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h0.setIP( h0.intfs[ 0 ], '192.168.123.1', '/24' )
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h1.setIP( h1.intfs[ 0 ], '192.168.123.2', '/24' )
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info( '*** Network state:\n' )
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for node in controller, switch, h0, h1:
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info( str( node ) + '\n' )
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info( '*** Starting controller and user datapath\n' )
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controller.cmd( cname + ' ' + cargs + '&' )
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switch.cmd( 'ifconfig lo 127.0.0.1' )
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intfs = [ switch.intfs[ port ] for port in (1, 2) ]
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switch.cmd( 'ofdatapath -i ' + ','.join( intfs ) + ' ptcp: &' )
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switch.cmd( 'ofprotocol tcp:' + controller.IP() + ' tcp:localhost &' )
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info( '*** Running test\n' )
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h0.cmdPrint( 'ping -c1 ' + h1.IP() )
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info( '*** Stopping network\n' )
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controller.cmd( 'kill %' + cname )
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switch.cmd( 'kill %ofdatapath' )
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switch.cmd( 'kill %ofprotocol' )
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if __name__ == '__main__':
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info( '*** Scratch network demo (user datapath)\n' )
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init()
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lg.setLogLevel( 'info' )
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scratchNetUser()
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