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     1 #!/usr/bin/env python
     2 
     3 #from mininet.cli import CLI
     4 #from mininet.link import Link
     5 #from mininet.net import Mininet
     6 #from mininet.node import RemoteController
     7 #from mininet.trm import makeTerm
     8 from mininet.topo import Topo
     9 class spanning_tree( Topo ):
    10         def __init__( self ):
    11                 Topo.__init__(self)
    12                 host1 = self.addHost('h1')
    13                 host2 = self.addHost('h2')
    14                 host3 = self.addHost('h3')
    15 
    16                 switch1 = self.addSwitch( 's1' )
    17                 switch2 = self.addSwitch( 's2' )
    18                 switch3 = self.addSwitch( 's3' )
    19 
    20                 self.addLink(switch1, host1)
    21                 self.addLink(switch2, host2)
    22                 self.addLink(switch3, host3)
    23 
    24                 self.addLink(switch1, switch2)
    25                 self.addLink(switch2, switch3)
    26                 self.addLink(switch1, switch3)
    27 
    28 topos = {'mytopo': ( lambda:spanning_tree())}

     环路拓扑结构,可能造成广播风暴:

    手动编写的拓扑

     1 #!/usr/bin/env python
     2 
     3 from mininet.cli import CLI
     4 from mininet.node import Node
     5 from mininet.link import Link
     6 from mininet.net import Mininet
     7 from mininet.node import RemoteController
     8 from mininet.term import makeTerm
     9 
    10 
    11 if '__main__' == __name__:
    12     net = Mininet(controller=RemoteController)
    13 
    14     c0 = net.addController('c0')
    15 
    16     s1 = net.addSwitch('s1')
    17     s2 = net.addSwitch('s2')
    18     s3 = net.addSwitch('s3')
    19 
    20     h1 = net.addHost('h1')
    21     h2 = net.addHost('h2')
    22     h3 = net.addHost('h3')
    23 
    24     Link(s1, h1)
    25     Link(s2, h2)
    26     Link(s3, h3)
    27 
    28     Link(s1, s2)
    29     Link(s2, s3)
    30     Link(s1, s3)
    31 
    32     net.build()
    33     c0.start()
    34     s1.start([c0])
    35     s2.start([c0])
    36     s3.start([c0])
    37 
    38     net.terms.append(makeTerm(c0))
    39     net.terms.append(makeTerm(s1))
    40     net.terms.append(makeTerm(s2))
    41     net.terms.append(makeTerm(s3))
    42     net.terms.append(makeTerm(h1))
    43     net.terms.append(makeTerm(h2))
    44     net.terms.append(makeTerm(h3))
    45 
    46     CLI(net)
    47     net.stop()
    View Code

    图像化生成的脚本:

    #!/usr/bin/python
    
    from mininet.net import Mininet
    from mininet.node import Controller, RemoteController, OVSController
    from mininet.node import CPULimitedHost, Host, Node
    from mininet.node import OVSKernelSwitch, UserSwitch
    from mininet.node import IVSSwitch
    from mininet.cli import CLI
    from mininet.log import setLogLevel, info
    from mininet.link import TCLink, Intf
    from subprocess import call
    
    def myNetwork():
    
        net = Mininet( topo=None,
                       build=False,
                       ipBase='10.0.0.0/8')
    
        info( '*** Adding controller
    ' )
        c0=net.addController(name='c0',
                          controller=Controller,
                          protocol='tcp',
                          port=6633)
    
        info( '*** Add switches
    ')
        s2 = net.addSwitch('s2', cls=OVSKernelSwitch)
        s1 = net.addSwitch('s1', cls=OVSKernelSwitch)
        s3 = net.addSwitch('s3', cls=OVSKernelSwitch)
    
        info( '*** Add hosts
    ')
        h2 = net.addHost('h2', cls=Host, ip='10.0.0.2', defaultRoute=None)
        h1 = net.addHost('h1', cls=Host, ip='10.0.0.1', defaultRoute=None)
        h3 = net.addHost('h3', cls=Host, ip='10.0.0.3', defaultRoute=None)
    
        info( '*** Add links
    ')
        net.addLink(h1, s1)
        net.addLink(s1, s2)
        net.addLink(s1, s3)
        net.addLink(s2, s3)
        net.addLink(h2, s2)
        net.addLink(s3, h3)
    
        info( '*** Starting network
    ')
        net.build()
        info( '*** Starting controllers
    ')
        for controller in net.controllers:
            controller.start()
    
        info( '*** Starting switches
    ')
        net.get('s2').start([c0])
        net.get('s1').start([c0])
        net.get('s3').start([c0])
    
        info( '*** Post configure switches and hosts
    ')
    
        CLI(net)
        net.stop()
    
    if __name__ == '__main__':
        setLogLevel( 'info' )
        myNetwork()
    View Code

    根据miniedit绘制拓扑生成的脚本:

    #!/usr/bin/python
    
    from mininet.net import Mininet
    from mininet.node import Controller, RemoteController, OVSController
    from mininet.node import CPULimitedHost, Host, Node
    from mininet.node import OVSKernelSwitch, UserSwitch
    from mininet.node import IVSSwitch
    from mininet.cli import CLI
    from mininet.log import setLogLevel, info
    from mininet.link import TCLink, Intf
    from subprocess import call
    
    def myNetwork():
    
        net = Mininet( topo=None,
                       build=False,
                       ipBase='10.0.0.0/8')
    
        info( '*** Adding controller
    ' )
        c0=net.addController(name='c0',
                          controller=Controller,
                          protocol='tcp',
                          port=6633)
    
        info( '*** Add switches
    ')
        s10 = net.addSwitch('s10', cls=OVSKernelSwitch)
        s3 = net.addSwitch('s3', cls=OVSKernelSwitch)
        s14 = net.addSwitch('s14', cls=OVSKernelSwitch)
        s19 = net.addSwitch('s19', cls=OVSKernelSwitch)
        s4 = net.addSwitch('s4', cls=OVSKernelSwitch)
        s20 = net.addSwitch('s20', cls=OVSKernelSwitch)
        s9 = net.addSwitch('s9', cls=OVSKernelSwitch)
        s11 = net.addSwitch('s11', cls=OVSKernelSwitch)
        s12 = net.addSwitch('s12', cls=OVSKernelSwitch)
        s15 = net.addSwitch('s15', cls=OVSKernelSwitch)
        s1 = net.addSwitch('s1', cls=OVSKernelSwitch)
        s6 = net.addSwitch('s6', cls=OVSKernelSwitch)
        s5 = net.addSwitch('s5', cls=OVSKernelSwitch)
        s16 = net.addSwitch('s16', cls=OVSKernelSwitch)
        s17 = net.addSwitch('s17', cls=OVSKernelSwitch)
        s7 = net.addSwitch('s7', cls=OVSKernelSwitch)
        s2 = net.addSwitch('s2', cls=OVSKernelSwitch)
        s18 = net.addSwitch('s18', cls=OVSKernelSwitch)
        s8 = net.addSwitch('s8', cls=OVSKernelSwitch)
        s13 = net.addSwitch('s13', cls=OVSKernelSwitch)
    
        info( '*** Add hosts
    ')
        h15 = net.addHost('h15', cls=Host, ip='10.0.0.15', defaultRoute=None)
        h6 = net.addHost('h6', cls=Host, ip='10.0.0.6', defaultRoute=None)
        h16 = net.addHost('h16', cls=Host, ip='10.0.0.16', defaultRoute=None)
        h10 = net.addHost('h10', cls=Host, ip='10.0.0.10', defaultRoute=None)
        h7 = net.addHost('h7', cls=Host, ip='10.0.0.7', defaultRoute=None)
        h8 = net.addHost('h8', cls=Host, ip='10.0.0.8', defaultRoute=None)
        h14 = net.addHost('h14', cls=Host, ip='10.0.0.14', defaultRoute=None)
        h1 = net.addHost('h1', cls=Host, ip='10.0.0.1', defaultRoute=None)
        h9 = net.addHost('h9', cls=Host, ip='10.0.0.9', defaultRoute=None)
        h4 = net.addHost('h4', cls=Host, ip='10.0.0.4', defaultRoute=None)
        h12 = net.addHost('h12', cls=Host, ip='10.0.0.12', defaultRoute=None)
        h5 = net.addHost('h5', cls=Host, ip='10.0.0.5', defaultRoute=None)
        h2 = net.addHost('h2', cls=Host, ip='10.0.0.2', defaultRoute=None)
        h11 = net.addHost('h11', cls=Host, ip='10.0.0.11', defaultRoute=None)
        h3 = net.addHost('h3', cls=Host, ip='10.0.0.3', defaultRoute=None)
        h13 = net.addHost('h13', cls=Host, ip='10.0.0.13', defaultRoute=None)
    
        info( '*** Add links
    ')
        net.addLink(s1, s5)
        net.addLink(s1, s7)
        net.addLink(s1, s9)
        net.addLink(s1, s11)
        net.addLink(s2, s5)
        net.addLink(s2, s7)
        net.addLink(s2, s9)
        net.addLink(s2, s11)
        net.addLink(s3, s6)
        net.addLink(s3, s8)
        net.addLink(s3, s10)
        net.addLink(s3, s12)
        net.addLink(s4, s6)
        net.addLink(s4, s8)
        net.addLink(s4, s10)
        net.addLink(s4, s12)
        net.addLink(s5, s13)
        net.addLink(s6, s14)
        net.addLink(s6, s13)
        net.addLink(s5, s14)
        net.addLink(s7, s15)
        net.addLink(s8, s16)
        net.addLink(s8, s15)
        net.addLink(s7, s16)
        net.addLink(s9, s17)
        net.addLink(s10, s18)
        net.addLink(s10, s17)
        net.addLink(s9, s18)
        net.addLink(s11, s19)
        net.addLink(s12, s20)
        net.addLink(s12, s19)
        net.addLink(s11, s20)
        net.addLink(s13, h1)
        net.addLink(s13, h2)
        net.addLink(s14, h3)
        net.addLink(s14, h4)
        net.addLink(s15, h5)
        net.addLink(s15, h6)
        net.addLink(s16, h7)
        net.addLink(s16, h8)
        net.addLink(s17, h9)
        net.addLink(s17, h10)
        net.addLink(s18, h11)
        net.addLink(s18, h12)
        net.addLink(s19, h13)
        net.addLink(s19, h14)
        net.addLink(s20, h16)
        net.addLink(s20, h15)
    
        info( '*** Starting network
    ')
        net.build()
        info( '*** Starting controllers
    ')
        for controller in net.controllers:
            controller.start()
    
        info( '*** Starting switches
    ')
        net.get('s10').start([])
        net.get('s3').start([c0])
        net.get('s14').start([])
        net.get('s19').start([])
        net.get('s4').start([c0])
        net.get('s20').start([])
        net.get('s9').start([])
        net.get('s11').start([])
        net.get('s12').start([])
        net.get('s15').start([])
        net.get('s1').start([c0])
        net.get('s6').start([])
        net.get('s5').start([])
        net.get('s16').start([])
        net.get('s17').start([])
        net.get('s7').start([])
        net.get('s2').start([c0])
        net.get('s18').start([])
        net.get('s8').start([])
        net.get('s13').start([])
    
        info( '*** Post configure switches and hosts
    ')
    
        CLI(net)
        net.stop()
    
    if __name__ == '__main__':
        setLogLevel( 'info' )
        myNetwork()
    View Code

    手动编写的fat-tree拓扑结构:

    #!/usr/bin/env python
    
    from mininet.cli import CLI
    from mininet.node import Node
    from mininet.link import Link
    from mininet.net import Mininet
    from mininet.node import RemoteController
    from mininet.term import makeTerm
    
    
    if '__main__' == __name__:
        net = Mininet(controller=RemoteController)
    
        c0 = net.addController('c0')
    
        s1 = net.addSwitch('s1')
        s2 = net.addSwitch('s2')
        s3 = net.addSwitch('s3')
        s4 = net.addSwitch('s4')
        s5 = net.addSwitch('s5')
        s6 = net.addSwitch('s6')
        s7 = net.addSwitch('s7')
        s8 = net.addSwitch('s8')
        s9 = net.addSwitch('s9')
        s10 = net.addSwitch('s10')
        s11 = net.addSwitch('s11')
        s12 = net.addSwitch('s12')
        s13 = net.addSwitch('s13')
        s14 = net.addSwitch('s14')
        s15 = net.addSwitch('s15')
        s16 = net.addSwitch('s16')
        s17 = net.addSwitch('s17')
        s18 = net.addSwitch('s18')
        s19 = net.addSwitch('s19')
        s20 = net.addSwitch('s20')
    
        h1 = net.addHost('h1')
        h2 = net.addHost('h2')
        h3 = net.addHost('h3')
        h4 = net.addHost('h4')
        h5 = net.addHost('h5')
        h6 = net.addHost('h6')
        h7 = net.addHost('h7')
        h8 = net.addHost('h8')
        h9 = net.addHost('h9')
        h10 = net.addHost('h10')
        h11 = net.addHost('h11')
        h12 = net.addHost('h12')
        h13 = net.addHost('h13')
        h14 = net.addHost('h14')
        h15 = net.addHost('h15')
        h16 = net.addHost('h16')
    
        Link(s1, s5)
        Link(s1, s7)
        Link(s1, s9)
        Link(s1, s11)
        Link(s2, s5)
        Link(s2, s7)
        Link(s2, s9)
        Link(s2, s11)
        Link(s3, s6)
        Link(s3, s8)
        Link(s3, s10)
        Link(s3, s12)
        Link(s2, s11)
        Link(s4, s6)
        Link(s4, s8)
        Link(s4, s10)
        Link(s4, s12)
        Link(s5, s13)
        Link(s5, s14)
        Link(s6, s13)
        Link(s6, s14)
        Link(s7, s15)
        Link(s7, s16)
        Link(s8, s15)
        Link(s8, s16)
        Link(s9, s17)
        Link(s9, s18)
        Link(s10, s17)
        Link(s10, s18)
        Link(s11, s19)
        Link(s11, s20)
        Link(s12, s19)
        Link(s12, s20)
        s = [s13, s14, s15, s16, s17, s18, s19, s20]
        h = [h1, h2, h3, h4, h5, h6, h7, h8, h9, h10, h11, h12, h13, h14, h15, h16]
        j = 0
        count = 0
        for i in range(0, len(s)):
            count = 0
            while count < 2:
                Link(s[i], h[j])
                j += 1
                count += 1
    
        net.build()
        c0.start()
        s1.start([c0])
        s2.start([c0])
        s3.start([c0])
        s4.start([c0])
    
     #   net.terms.append(makeTerm(c0))
     #   net.terms.append(makeTerm(s1))
     #   net.terms.append(makeTerm(s2))
     #   net.terms.append(makeTerm(s3))
     #   net.terms.append(makeTerm(h1))
     #   net.terms.append(makeTerm(h2))
     #   net.terms.append(makeTerm(h3))
    
        CLI(net)
        net.stop()
    View Code

     开源fat-tree拓扑结构:

    from mininet.net import Mininet
    from mininet.node import Controller, RemoteController
    from mininet.cli import CLI
    from mininet.log import setLogLevel, info
    from mininet.link import Link, Intf, TCLink
    from mininet.topo import Topo
    from mininet.util import dumpNodeConnections
    import logging
    import os
    
    logging.basicConfig(level=logging.DEBUG)
    logger = logging.getLogger( __name__ )
    
    class HugeTopo(Topo):
        logger.debug("Class HugeTopo")
        CoreSwitchList = []
        AggSwitchList = []
        EdgeSwitchList = []
        HostList = []
        iNUMBER = 0
    
        def __init__(self):
            logger.debug("Class HugeTopo init")
            iNUMBER = 4
            
            self.iNUMBER = iNUMBER
            self.iCoreLayerSwitch = iNUMBER
            self.iAggLayerSwitch = iNUMBER * 2
            self.iEdgeLayerSwitch = iNUMBER * 2
            self.iHost = self.iEdgeLayerSwitch * 2
    
            Topo.__init__(self)
    
        def createTopo(self):
            logger.debug("Start create Core Layer Switch")
            self.createCoreLayerSwitch(self.iCoreLayerSwitch)
            logger.debug("Start create Agg Layer Switch")
            self.createAggLayerSwitch(self.iAggLayerSwitch)
            logger.debug("Start create Edge Layer Switch")
            self.createEdgeLayerSwitch(self.iEdgeLayerSwitch)
            logger.debug("Satrt create Host")
            self.createHost(self.iHost)
    
        def createCoreLayerSwitch(self, NUMBER):
            logger.debug("Create Core Layer")
            for x in range(1, NUMBER+1):
                PERFIX = "100"
                if x >= int(10):
                    PERFIX = "10"
                self.CoreSwitchList.append(self.addSwitch(PERFIX + str(x)))
        
        def createAggLayerSwitch(self, NUMBER):
                    logger.debug("Create Agg Layer")
                    for x in range(1, NUMBER+1):
                            PERFIX = "200"
                            if x >= int(10):
                                    PERFIX = "20"
                            self.AggSwitchList.append(self.addSwitch(PERFIX + str(x)))
    
        def createEdgeLayerSwitch(self, NUMBER):
                    logger.debug("Create Edge Layer")
                    for x in range(1, NUMBER+1):
                            PERFIX = "300"
                            if x >= int(10):
                                    PERFIX = "30"
                            self.EdgeSwitchList.append(self.addSwitch(PERFIX + str(x)))
        def createHost(self, NUMBER):
                    logger.debug("Create Host")
                    for x in range(1, NUMBER+1):
                            PERFIX = "400"
                            if x >= int(10):
                                    PERFIX = "40"
                            self.HostList.append(self.addHost(PERFIX + str(x)))
        
        def createLink(self):
            logger.debug("Create Core to Agg")
            for x in range(0, self.iAggLayerSwitch, 2):
                self.addLink(self.CoreSwitchList[0], self.AggSwitchList[x], bw=1000, loss=5)
                self.addLink(self.CoreSwitchList[1], self.AggSwitchList[x], bw=1000, loss=5)
    
            for x in range(1, self.iAggLayerSwitch, 2):
                            self.addLink(self.CoreSwitchList[2], self.AggSwitchList[x], bw=1000, loss=5)
                            self.addLink(self.CoreSwitchList[3], self.AggSwitchList[x], bw=1000, loss=5)
    
            logger.debug("Create Agg to Edge")
                    for x in range(0, self.iAggLayerSwitch, 2):
                            self.addLink(self.AggSwitchList[x], self.EdgeSwitchList[x], bw=100)
                            self.addLink(self.AggSwitchList[x], self.EdgeSwitchList[x+1], bw=100)
                self.addLink(self.AggSwitchList[x+1], self.EdgeSwitchList[x], bw=100)
                            self.addLink(self.AggSwitchList[x+1], self.EdgeSwitchList[x+1], bw=100)
            
            logger.debug("Create Edge to Host")
                    for x in range(0, self.iEdgeLayerSwitch):
                            self.addLink(self.EdgeSwitchList[x], self.HostList[2*x])
                            self.addLink(self.EdgeSwitchList[x], self.HostList[2*x+1])
    
    def enableSTP():
        for x in range(1, 5):
            cmd = "ovs-vsctl set Bridge %s stp_enable=true" % ("100" + str(x))
            os.system(cmd)
            print cmd
        for x in range(1, 9):
            cmd = "ovs-vsctl set Bridge %s stp_enable=true" % ("200" + str(x))
                    os.system(cmd)
                    print cmd
            cmd = "ovs-vsctl set Bridge %s stp_enable=true" % ("300" + str(x))
                    os.system(cmd)
                    print cmd
    
    def iperfTest(net, topo):
        logger.debug("Start iperfTest:")
        h1000, h1015, h1016 = net.get(topo.HostList[0], topo.HostList[14], topo.HostList[15])
            
        h1000.popen('iperf -s -u -i 1 > iperf_server_differentPod_result', shell=True)
        h1015.popen('iperf -s -u -i 1 > iperf_server_samePod_result', shell=True)
        h1016.cmdPrint('iperf -c' + h1000.IP() + ' -u -t 10 -i 1 -b 100m')
        h1016.cmdPrint('iperf -c' + h1015.IP() + ' -u -t 10 -i 1 -b 100m')
    
    def pingTest(net):
        logger.debug("Start Test all network")
        net.pingAll()
    
    def createTopo():
        logging.debug("LV1 Create HugeTopo")
        topo = HugeTopo()
        topo.createTopo()
        topo.createLink()
    
        logging.debug("LV1 Start Mininet")
        CONTROLLER_IP = "192.168.116.128"
        CONTROLLER_PORT = 6633
        net = Mininet(topo=topo, link=TCLink, controller=None)
        net.addController('controller', controller=RemoteController,ip=CONTROLLER_IP, port=CONTROLLER_PORT)
        net.start()
    
        logger.debug("LV1 dumpNode")
        enableSTP()
        dumpNodeConnections(net.hosts)
            
        pingTest(net)
        iperfTest(net, topo)
            
        CLI(net)
        net.stop()
    
    if __name__ == '__main__':
        setLogLevel('info')
        if os.getuid() != 0:
            logger.debug("You are not root")
        elif os.getuid() == 0:
            createTopo()
    View Code
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  • 原文地址:https://www.cnblogs.com/CoolRandy/p/6001042.html
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