1. 安装轻量级网络仿真工具Mininet
安装步骤
- git clone git://github.com/mininet/mininet
- cd mininet/util
- ./install.sh -a
2.用字符命令搭建如下拓扑,要求写出命令
- sudo mn --topo linear,3
- 展示网络信息
- Net
- sudo mn --topo tree,depth=2,fanout=3
- 展示网络信息
- Net
3.利用可视化工具搭建如下拓扑,并要求支持OpenFlow 1.0 1.1 1.2 1.3,设置h1(10.0.0.10)、h2(10.0.0.11)、h3(10.0.0.12),拓扑搭建完成后使用命令验证主机ip,查看拓扑端口连接情况。
- 打开miniedit.py
- 添加网络组件,建立拓扑
- -设置属性
- 使用命令验证主机ip,查看拓扑端口情况
4利用Python脚本完成如下图所示的一个Fat-tree型的拓扑(交换机和主机名需与图中一致,即s1~s6,h1~h8,并且链路正确,请给出Mininet相关截图)
- python代码
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 = 4 c = [] a = [] # 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[0: :1]: self.addLink(sw2, sw1) #add hosts and its links with aggregation 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()) }
- 输入
sudo mn --custom t4.py --topo mytopo --switch ovsk,protocols=OpenFlow10
- 运行截图