定制拓扑Mininet

问题描述

我正在开发一个项目，在该项目中我必须制作一个圆形拓扑，但这在运行拓扑时给我一个错误。

 from mininet.net import Mininet
    from mininet.node import OVSSwitch,Controller
    from mininet.topo import Topo
    from mininet.log import setLogLevel
    from mininet.cli import CLI
    
    setLogLevel( 'info' )
    
    # Two remote controllers
    c1 = Controller( 'c1',port=6634 )
    c2 = Controller( 'c2',port=6633 )
    
    # You dont need the links between the controller and the switches,# You can connect with the personalized mapping
    cmap = { 's1': c1,'s2': c1,'s3': c2,'s4': c2}
    class NatTopo( Topo ):
        def build( self,natIP='10.0.0.254' ):
            self.hopts = { 'defaultRoute': 'via ' + natIP }
            hosts = [ self.addHost( h ) for h in 'h1','h2','h3','h4' ]
            s1 = self.addSwitch( 's1' )
            s2 = self.addSwitch( 's2' )
            s3 = self.addSwitch( 's3' )
            s4 = self.addSwitch( 's4' )
            for h in hosts:
                self.addLink( s1,h )
                self.addLink( s2,h )
                self.addLink( s3,h )
                self.addLink( s4,h )
            nat1 = self.addNode( 'nat1',cls=NAT,ip=natIP,inNamespace=False )
            self.addLink( nat1,s1 )
            self.addLink( nat1,s2 )
            self.addLink( nat1,s3 )
             self.addLink( nat1,s4 )
class MultiSwitch( OVSSwitch ):
    "Custom Switch() subclass that connects to different controllers"
    def start( self,controllers ):
        return OVSSwitch.start( self,[ cmap[ self.name ] ] )

class MyTopo(Topo):

 def __init__( self ):
        "Create custom topo."



topo = MyTopo()
net = Mininet( topo=topo,switch=MultiSwitch,build=False )
net.addNAT().configDefault()
for c in [ c1,c2 ]:
    net.addController(c)
net.build()
net.start()
CLI( net )
net.stop()
topos = { 'mytopo': ( lambda: MyTopo() ) }

当我尝试启动拓扑时，出现以下错误：

mininet@mininet-vm:~/mininet/custom$ sudo python custom-topo-proj.py
Traceback (most recent call last):
  File "custom-topo-proj.py",line 60,in <module>
    net.addNAT().configDefault()
  File "build/bdist.linux-x86_64/egg/mininet/net.py",line 282,in addNAT

IndexError：列表索引超出范围

如果有任何感冒可以帮助我解决该问题，请立即启动nat并连接所有链接

解决方法

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