1. 安装轻量级网络仿真工具Mininet
Ubuntu源内安装,命令为:
sudo apt-get install mininet
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103000422358-514141126.png)
2. 用字符命令搭建拓扑,
搭建线型拓扑:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103003438881-1223208785.png)
sudo mn --topo linear,4
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103000931444-300063828.png)
查看net信息 输入命令net
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103001107268-1878368601.png)
查看所有节点连通性 输入命令pingall
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103001150721-998181061.png)
搭建树形拓扑:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103003453397-1660950625.png)
sudo mn --topo tree,depth=3,fanout=2
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103001444172-851171594.png)
查看net信息 输入命令net
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103001532852-831685533.png)
查看所有节点连通性 输入命令pingall
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103001553804-1519314688.png)
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。
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103140514418-919479221.png)
打开可视化工具:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103001939617-1236391296.png)
搭建拓扑:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103002108810-734977776.png)
设置三个主机的IP地址:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103002326809-1752560757.png)
运行我的拓扑
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103134507629-1255762366.png)
输入net查看网络:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103134558854-542470998.png)
使用xterm语句验证主机ip,查看拓扑端口连接情况:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103135827694-719479334.png)
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s1s6,h1h8,并且链路正确,请给出Mininet相关截图)
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103135925995-879316992.png)
Python脚本代码:
#!/usr/bin/python
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
c = []
a = []
for i in range( L1 ):
sw = self.addSwitch( 's{}'.format( i + 1 ) )
c.append( sw )
for i in range( L2 ):
sw = self.addSwitch( 's{}'.format( L1 + i + 1 ) )
a.append( sw )
for i in range( L1 ):
sw1 = c[i]
for sw2 in a[i/2::L1/2]:
self.addLink( sw2, sw1 )
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() ) }
}
用以下命令生成拓扑:
sudo mn --custom fattree.py --topo mytopo --switch ovsk,protocols=OpenFlow10
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103182300314-134105148.png)
输入net查看拓扑结构:
![](https://img2018.cnblogs.com/blog/1797252/201911/1797252-20191103182410186-268765439.png)