1.安装mininet

• mininet安装教程：

  

2.用字符命令生成拓扑，并测试连通性，截图

• 字符命令方式

• 生成拓扑：

  

• 测试连通性：

  

3.用可视化界面生成拓扑，并测试连通性，截图

• 可视化界面

• 生成拓扑：

  
  

• 测试：

  

4.用Python脚本生成一个Fat-tree型的拓扑，截图

• 我自己的ubuntu不是老师发的，在Java环境配置和ant配置时遇到了困难，多次尝试未果，遂拷同学ubuntu来用

• Floodlight Controler Installation Guide

• Fat-tree型的拓扑参考链接

• 生成拓扑：

  

• 测试：

  
  

• 代码：

  #!/usr/bin/python"""Custom topology exampleAdding the 'topos' dict with a key/value pair to generate our newly definedtopology enables one to pass in '--topo=mytopo' from the command line."""from mininet.topo import Topofrom mininet.net import Mininetfrom mininet.node import RemoteController,CPULimitedHostfrom mininet.link import TCLinkfrom mininet.util import dumpNodeConnectionsclass MyTopo( Topo ):"Simple topology example."def __init__( self ):"Create custom topo."# Initialize topologyTopo.__init__( self )L1 = 2L2 = L1 * 2 L3 = L2c = []a = []e = []# add core ovs  for i in range( L1 ):sw = self.addSwitch( 'c{}'.format( i + 1 ) )c.append( sw )# add aggregation ovsfor i in range( L2 ):sw = self.addSwitch( 'a{}'.format( L1 + i + 1 ) )a.append( sw )# add edge ovsfor i in range( L3 ):sw = self.addSwitch( 'e{}'.format( L1 + L2 + i + 1 ) )e.append( sw )# add links between core and aggregation ovsfor i in range( L1 ):sw1 = c[i]for sw2 in a[i/2::L1/2]:# self.addLink(sw2, sw1, bw=10, delay='5ms', loss=10, max_queue_size=1000, use_htb=True)self.addLink( sw2, sw1 )# add links between aggregation and edge ovsfor i in range( 0, L2, 2 ):for sw1 in a[i:i+2]:for sw2 in e[i:i+2]:self.addLink( sw2, sw1 )#add hosts and its links with edge ovscount = 1for sw1 in e:for i in range(2):host = self.addHost( 'h{}'.format( count ) )self.addLink( sw1, host )count += 1
topos = { 'mytopo': ( lambda: MyTopo() ) }