1. 安装轻量级网络仿真工具Mininet
使用GitHub源码安装:
(1)首先从GitHub上获取mininet源码:
git clone https://github.com/mininet/mininet.git
(2)输入如下命令进行安装:
cd mininet/util ./install.sh
每次克隆到某个文件的时候都会遇到这个问题:
解决方法:用查找install.sh文件中的有git clone的部分,然后再替换成http
git clone git://github.com/mininet/openflow
替换成
git clone http://github.com/mininet/openflow
就解决了
等待一段时间后就安装成功啦
真希望我能够Enjoy Mininet哈哈哈哈
(3)安装完成后用mn --version命令查看所安装mininet的版本信息:
mn --version
2. 用字符命令搭建如下拓扑,要求写出命令
(1)
命令如下:
sudo mn --topo linear,3
(2)
命令如下:
sudo mn --topo tree,fanout=3,depth=2
每次要新建拓扑时,需执行以下命令,防止上次操作对本次实验的影响。
sudo mn -c
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。
(1)在~/mininet/examples目录下打开终端,执行以下命令:
./miniedit.py
即可打开可视化控件,搭建拓扑:
(2)设置h1(10.0.0.10)、h2(10.0.0.11)、h3(10.0.0.12),并在miniedit工具中开启CLI:
(3)点击Run按钮:
(4)通过net查看拓扑:
(5)使用xterm语句验证主机ip,查看拓扑端口连接情况:
4. 利用Python脚本完成如下图所示的一个Fat-tree型的拓扑
(1)python脚本代码:
#!/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 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() ) } }
(2)用以下命令生成拓扑:
sudo mn --custom fattree.py --topo mytopo --switch ovsk,protocols=OpenFlow10
(3)使用net命令验证拓扑结构: