Mininet簡單性能測試

建一個簡單的模型，使用一個單交換機，然后鏈接n個主機形成拓撲，然后對每個鏈路設置帶寬，延遲時間，和丟包率。

這里就選擇建一個單交換機和六個主機的作為例子。

創建py腳本生成拓撲：寫一個類生成一個單交換機和六個主機的拓撲，並且給每個主機和交換機之間的連接賦予100m的帶寬，5ms的延遲和1%的丟包率。然后通過pingall函數測試連接，iperf函數測試主機間的帶寬，

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import CPULimitedHost
from mininet.link import TCLink
from mininet.util import dumpNodeConnections
from mininet.log import setLogLevel


class SingleSwitchTopo(Topo):
    def __init__(self, n=2, **opts):
        Topo.__init__(self, **opts)
        switch = self.addSwitch('s1')
        for h in range(n):
            # Each host gets 50%/n of system CPU
            host = self.addHost('h%s' % (h + 1), cpu=.5/n)
            # 100 Mbps, 5ms delay, 1% Loss, 1000 packet queue
            self.addLink(host, switch, bw=100, delay='5ms', loss=1,
                         max_queue_size=1000, use_htb=True)


def perfTest():
    topo = SingleSwitchTopo(n=6)
    net = Mininet(topo=topo, host=CPULimitedHost, link=TCLink)
    net.start()
    print "Dumping host connections"
    dumpNodeConnections(net.hosts)
    print "Testing network connectivity"
    net.pingAll()
    print "Testing bandwidth between h1 and h4"
    h1, h4 = net.get('h1', 'h4')
    net.iperf((h1, h4))
    print "Testing bandwidth between h1 and h6"
    h1, h6 = net.get('h1', 'h6')
    net.iperf((h1, h6))
    net.stop()


if __name__ == '__main__':
    setLogLevel('info')
    perfTest()

 

　　

ps:如果直接執行出現錯誤找不到py解釋器的話，在代碼開頭加上#!/usr/bin/python。或者直接使用

sudo python 文件名.py

 

 執行

結果如下圖所示：

---

瞎搞一波，再試試兩個交換機相互連接，然后分別下掛三個主機。link全部賦予10m帶寬，5ms延遲和0%的丟包率。

from mininet.topo import Topo
from mininet.net import Mininet
from mininet.node import CPULimitedHost
from mininet.link import TCLink
from mininet.util import dumpNodeConnections
from mininet.log import setLogLevel


class DoubleSwitchTopo(Topo):
    def __init__(self, n=2, **opts):
        Topo.__init__(self, **opts)
        switch1 = self.addSwitch('s1')
        switch2 = self.addSwitch("s2")
        self.addLink(switch1, switch2, bw=10, delay='5ms',
                     loss=0, max_queue_size=1000, use_htb=True)
        for h in range(n/2):
            host = self.addHost('h%s' % (h + 1), cpu=.5/n)
            self.addLink(host, switch1, bw=10, delay='5ms', loss=0,
                         max_queue_size=1000, use_htb=True)
        for h in range(n/2, n):
            host = self.addHost('h%s' % (h + 1), cpu=.5/n)
            self.addLink(host, switch2, bw=10, delay='5ms', loss=0,
                         max_queue_size=1000, use_htb=True)


def perfTest():
    topo = DoubleSwitchTopo(n=6)
    net = Mininet(topo=topo, host=CPULimitedHost, link=TCLink)
    net.start()
    print "Dumping host connections"
    dumpNodeConnections(net.hosts)
    print "Testing network connectivity"
    net.pingAll()
    print "Testing bandwidth between h1 and h3"
    h1, h3 = net.get('h1', 'h3')
    net.iperf((h1, h3))
    print "Testing bandwidth between h4 and h6"
    h4, h6 = net.get('h4', 'h6')
    net.iperf((h4, h6))
    net.stop()


if __name__ == '__main__':
    setLogLevel('info')
    perfTest()

 

 

結果如下圖：