2019 SDN上机第一次作业

  1. 安装轻量级网络仿真工具Mininet
    ==========

(1)安装git

sudo apt-get install git

(2)clone

sudo git clone http://www.github.com/mininet/mininet

(3)安装mininet

sudo apt-get install mininet

(4)安装成功

  1. 用字符命令搭建如下拓扑
    ==========
    (1)

sudo mn --topo linear,3

(2)

sudo mn --topo tree,fanout=3,depth=2

  1. 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。
    ==========

创建拓扑如下:

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):




拓扑端口连接:


验证主机ip:



4.利用Python脚本完成如下图所示的一个Fat-tree型的拓扑

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 ):
        Topo.__init__( self )
        L1 = 2
        L2 = L1 * 2 
        L3 = L2
        s = []
        a = []
        e = []
        for i in range( L1 ):
                sw = self.addSwitch( 's{}'.format( i + 1 ) )
                s.append( sw )
        for i in range( L2 ):
                sw = self.addSwitch( 's{}'.format( L1 + i + 1 ) )
                a.append( sw )
        for i in range( L1 ):
                sw1 = s[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() ) }
posted @ 2019-11-03 18:06  小式9527  阅读(133)  评论(0编辑  收藏  举报