实验1:SDN拓扑实践
1. Mininet运行结果截图
2. 使用Mininet的命令行生成如下拓扑
a). 3台交换机,每个交换机连接1台主机,3台交换机连接成一条线。
b).3台主机,每个主机都连接到同1台交换机上。
c). 在b)的基础上,在Mininet交互界面上新增1台主机并且连接到交换机上,再测试新拓扑的连通性
3. 修改过的代码、Mininet运行结果
a). 代码
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\n' )
c0=net.addController(name='c0',
controller=Controller,
protocol='tcp',
port=6633)
info( '*** Add switches\n')
s1 = net.addSwitch('s1', cls=OVSKernelSwitch)
s2 = net.addSwitch('s2', cls=OVSKernelSwitch)
info( '*** Add hosts\n')
h1 = net.addHost('h1', cls=Host, ip='10.0.0.1', defaultRoute=None, cpu=0.5)
h2 = net.addHost('h2', cls=Host, ip='10.0.0.2', defaultRoute=None)
h3 = net.addHost('h3', cls=Host, ip='10.0.0.3', defaultRoute=None)
h4 = net.addHost('h4', cls=Host, ip='10.0.0.4', defaultRoute=None)
info( '*** Add links\n')
net.addLink(h1, s1,bw =10, delay='5ms', max_queue_size=1000, loss=50, use_htb=True)
net.addLink(s1, h2)
net.addLink(h3, s2)
net.addLink(s2, h4)
net.addLink(s1, s2)
info( '*** Starting network\n')
net.build()
info( '*** Starting controllers\n')
for controller in net.controllers:
controller.start()
info( '*** Starting switches\n')
net.get('s1').start([c0])
net.get('s2').start([c0])
info( '*** Post configure switches and hosts\n')
CLI(net)
net.stop()
if __name__ == '__main__':
setLogLevel( 'info' )
myNetwork()
b). Mininet运行结果
4. 个人总结
在这次实验中,我对拓扑结构的原理和创建有了更深的理解,对mininet的使用有了初步的经验。由于python不熟练,代码方面遇到了不少问题,经过了学习与研究。收获颇多,希望能在后续的学习中有更多的收获!
标签:info,mininet,Mininet,拓扑,实践,import,SDN,net,cls From: https://www.cnblogs.com/aJSALaSJalnxlA/p/16873463.html