| #!/usr/bin/env python |
| |
| ''' file: custom/optical.py ''' |
| |
| from mininet.topo import Topo |
| from mininet.net import Mininet |
| from mininet.cli import CLI |
| from mininet.log import setLogLevel, info |
| from mininet.util import irange |
| |
| class OpticalTopo( Topo ): |
| |
| def build( self, n=3, tapStart=3 ): |
| |
| # Add hosts and switches |
| hosts = [] |
| switches = [] |
| for i in irange( 1, n ): |
| h = self.addHost( 'h%d' % i ) |
| s = self.addSwitch( 's%d' % i ) |
| self.addLink( h, s ) |
| hosts.append( h ) |
| switches.append( s ) |
| |
| # Add optical tap interfaces |
| tapNum = tapStart |
| for sw in switches: |
| self.addLink( sw, sw, intfName1='%s-eth0' % sw, intfName2='tap%d' % tapNum ) |
| tapNum += 1 |
| |
| # if you use, sudo mn --custom custom/optical.py, then register the topo: |
| #sudo mn --custom optical-topo.py --topo optical,5 |
| topos = { 'optical': OpticalTopo } |
| |
| def installStaticFlows( net ): |
| for swName in [ 's1', 's2', 's3', 's4', 's5', 's6' ]: |
| info( 'Adding flows to %s...' % swName ) |
| sw = net[ swName ] |
| sw.dpctl( 'add-flow', 'in_port=1,actions=output=2' ) |
| sw.dpctl( 'add-flow', 'in_port=2,actions=output=1' ) |
| info( sw.dpctl( 'dump-flows' ) ) |
| |
| def run(): |
| net = Mininet( topo=OpticalTopo() ) |
| net.start() |
| #installStaticFlows( net ) |
| CLI( net ) |
| net.stop() |
| |
| # if the script is run directly (sudo custom/optical.py): |
| if __name__ == '__main__': |
| setLogLevel( 'info' ) |
| run() |