【Mininet】Mininet设置带宽之简单性能测试
实验参考:
实验步骤:
1. 进入mininet/custom目录下,通过vi mymininet1.py创建脚本并添加内容(本实验通过python脚本自定义拓扑,创建包含一个交换机、四个主机的网络拓扑):
#!/usr/bin/python
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):
"Single switch connected to n hosts."
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)
#10 Mbps, 5ms delay, 0% Loss, 1000 packet queue
self.addLink(host, switch, bw=10, delay='5ms', loss=0, max_queue_size=1000, use_htb=True)
def perfTest():
"Create network and run simple performance test"
topo = SingleSwitchTopo(n=4)
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))
net.stop()
if __name__=='__main__':
setLogLevel('info')
perfTest()
2. 修改文件权限并将其执行:
实验结论:
通过python脚本创建Mininet脚本,对设备链路间的带宽、延迟、丢包率等(如:bw=10, delay='5ms', loss=0, max_queue_size=1000, use_htb=True)进行设置 ,对设备有一个限制作用,且通过iperf来进行测试主机间的性能。