| #!/usr/bin/python |
| |
| import os |
| from optparse import OptionParser |
| |
| from mininet.net import Mininet |
| from mininet.topo import Topo |
| from mininet.node import RemoteController, UserSwitch, Host |
| from mininet.link import TCLink |
| from mininet.log import setLogLevel |
| from mininet.cli import CLI |
| |
| |
| # Parse command line options and dump results |
| def parseOptions( ): |
| """Parse command line options""" |
| parser = OptionParser( ) |
| parser.add_option( '--spine', dest='spine', type='int', default=2, |
| help='number of spine switches, default=2' ) |
| parser.add_option( '--leaf', dest='leaf', type='int', default=2, |
| help='number of leaf switches, default=2' ) |
| parser.add_option( '--fanout', dest='fanout', type='int', default=2, |
| help='number of hosts per leaf switch, default=2' ) |
| parser.add_option( '--onos', dest='onos', type='int', default=0, |
| help='number of ONOS Instances, default=0, 0 means localhost, 1 will use OC1 and so on' ) |
| |
| (options, args) = parser.parse_args( ) |
| return options, args |
| |
| |
| opts, args = parseOptions( ) |
| |
| |
| class LeafAndSpine( Topo ): |
| def __init__( self, spine=2, leaf=2, fanout=2, **opts ): |
| "Create Leaf and Spine Topo." |
| |
| Topo.__init__( self, **opts ) |
| |
| # Add spine switches |
| spines = { } |
| for s in range( spine ): |
| spines[ s ] = self.addSwitch( 'spine10%s' % (s + 1), |
| dpid="00000000010%s" % (s + 1) ) |
| # Set link speeds to 100Mb/s |
| linkopts = dict( bw=100 ) |
| |
| # Add Leaf switches |
| for ls in range( leaf ): |
| leafSwitch = self.addSwitch( 'leaf%s' % (ls + 1), |
| dpid="00000000000%s" % (1 + ls) ) |
| # Connect leaf to all spines |
| for s in range( spine ): |
| switch = spines[ s ] |
| self.addLink( leafSwitch, switch, **linkopts ) |
| # Add hosts under a leaf, fanout hosts per leaf switch |
| for f in range( fanout ): |
| host = self.addHost( 'h%s' % (ls * fanout + f + 1), |
| cls=IpHost, |
| ip='10.0.%s.%s/24' % ((ls + 1), (f + 1)), |
| gateway='10.0.%s.254' % (ls + 1) ) |
| self.addLink( host, leafSwitch, **linkopts ) |
| |
| |
| class IpHost( Host ): |
| def __init__( self, name, gateway, *args, **kwargs ): |
| super( IpHost, self ).__init__( name, *args, **kwargs ) |
| self.gateway = gateway |
| |
| def config( self, **kwargs ): |
| Host.config( self, **kwargs ) |
| mtu = "ifconfig " + self.name + "-eth0 mtu 1490" |
| self.cmd( mtu ) |
| self.cmd( 'ip route add default via %s' % self.gateway ) |
| |
| |
| def config( opts ): |
| spine = opts.spine |
| leaf = opts.leaf |
| fanout = opts.fanout |
| controllers = [ os.environ[ 'OC%s' % i ] for i in |
| range( 1, opts.onos + 1 ) ] if (opts.onos) else [ |
| '127.0.0.1' ] |
| topo = LeafAndSpine( spine=spine, leaf=leaf, fanout=fanout ) |
| net = Mininet( topo=topo, link=TCLink, build=False, |
| switch=UserSwitch, |
| controller=None, |
| autoSetMacs=True ) |
| i = 0 |
| for ip in controllers: |
| net.addController( "c%s" % (i), controller=RemoteController, ip=ip ) |
| i += 1; |
| net.build( ) |
| net.start( ) |
| CLI( net ) |
| net.stop( ) |
| |
| |
| if __name__ == '__main__': |
| setLogLevel( 'info' ) |
| config( opts ) |
| os.system( 'sudo mn -c' ) |