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mininet / examples / scratchnet.py @ efc9a01c

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#!/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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"""
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import logging
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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 info
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# print out info() messages, including cmdPrint
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logging.LOGLEVELDEFAULT = logging.INFO
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def scratchNet( cname='controller', cargs='ptcp:'):
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    # Create Network
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    print "*** creating Nodes"
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    controller = Node( 'c0', inNamespace=False )
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    switch = Node( 's0', inNamespace=False )
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    h0 = Node( 'h0' )
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    h1 = Node( 'h1' )
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    print "*** creating links"
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    createLink( node1=h0, port1=0, node2=switch, port2=0 )
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    createLink( node1=h1, port1=0, node2=switch, port2=1 )
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    # Configure hosts
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    print "*** configuring hosts"
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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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    print h0
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    print h1
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    # Start network using kernel datapath
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    controller.cmdPrint( cname + ' ' + cargs + '&' )
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    switch.cmdPrint( 'dpctl deldp nl:0' )
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    switch.cmdPrint( 'dpctl adddp nl:0' )
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    for intf in switch.intfs.values():
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      switch.cmdPrint( 'dpctl addif nl:0 ' + intf )
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    switch.cmdPrint( 'ofprotocol nl:0 tcp:localhost &')
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    # Run test
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    print h0.cmd( 'ping -c1 ' + h1.IP() )
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    # Stop network
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    controller.cmdPrint( 'kill %' + cname)
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    switch.cmdPrint( 'dpctl deldp nl:0' )
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    switch.cmdPrint( 'kill %ofprotocol' )
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    switch.stop()
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    controller.stop()
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if __name__ == '__main__':
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    info( '*** Scratch network demo\n' )
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    init()   
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    scratchNet()