实验1：SDN拓扑实践进阶部分(使用python循环语句)

#!/usr/bin/env python

from mininet.topo import Topo

class MyTopo(Topo):

	def __init__(self):
		Topo.__init__(self)

    	#host
		for i in range(1,9):
			self.addHost("h"+str(i))

	#switch

		for i in range(1,11):
			self.addSwitch("s"+str(i))

	#-------------

		for i in range(1,3):
			for j in range(3,7):
				self.addLink("s"+str(i),"s"+str(j))

	#-------------

		for i in range(3,5):
			for j in range(7,9):
				self.addLink("s"+str(i),"s"+str(j))

		for i in range(5,7):
			for j in range(9,11):
				self.addLink("s"+str(i),"s"+str(j))
	#-------------
		for i in range(7,11):
			for j in range((i-6)*2-1,(i-6)*2+1):
				self.addLink("s"+str(i),"h"+str(j))
				
	#使用stp协议需要在启动mininet时向命令中添加参数 --switch lxbr,stp=1 or --switch ovsbr,stp=1

topos = {'mytopo': (lambda: MyTopo())}