git clone https://github.com/mininet/mininet.git cd mininet/util ./install.sh
sudo mn --topo linear,3
sudo mn --topo tree,fanout=3,depth=2
cd mininet cd examples sudo ./miniedit.py
#!/usr/bin/python #创建网络拓扑 """Custom topology example Adding the 'topos' dict with a key/value pair to generate our newly defined topology enables one to pass in '--topo=mytopo' from the command line. """ from mininet.topo import Topo from mininet.net import Mininet from mininet.node import RemoteController,CPULimitedHost from mininet.link import TCLink from mininet.util import dumpNodeConnections class MyTopo( Topo ): "Simple topology example." def __init__( self ): "Create custom topo." # Initialize topology Topo.__init__( self ) L1 = 2 L2 = L1 * 2 #L3 = L2 c = [] a = [] #e = [] # add core ovs for i in range( L1 ): sw = self.addSwitch( 's{}'.format( i + 1 ) ) c.append( sw ) # add aggregation ovs for i in range( L2 ): sw = self.addSwitch( 's{}'.format( L1 + i + 1 ) ) a.append( sw ) # add links between core and aggregation ovs for 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 hosts and its links with edge ovs count = 1 for sw1 in a: for i in range(2): host = self.addHost( 'h{}'.format( count ) ) self.addLink( sw1, host ) count += 1 topos = { 'mytopo': ( lambda: MyTopo() ) } 
本次实验较为简单，基本上按照给定的操作按部就班，配置好合适的环境就可以顺利完成作业。不过一不小心还是很容易出错的，诸如
1：没有sudo mn -c导致出现文件已存在；
2：当执行sudo ./install.sh后执行一段程序后出现错误：
Cloning into ‘openflow’…
fatal: read error: Connection reset by peer
出现这个错误是因为在install.sh中存在的git下openflow的地址失效了
解决方案：
sudo gedit install.sh
找到openflow的安装地址git clone git://openflowswitch.org/openflow.git
将其修改为git clone git://github.com/mininet/openflow
保存重新执行install.sh即可。
来源：博客园
作者：牧分丶
链接：https://www.cnblogs.com/lhwblogs/p/11788494.html