Network function and performance test based on the mininet library
Network function and performance test based on the mininet library
Overview:
Mininet is an open source network simulator that can be used for virtualized experimental environment for network function and performance testing.This article will introduce how to use the MINET class library for network function and performance testing, and provide related programming code and configuration description.
preface:
Network function and performance testing are essential for the design and optimization of the network system.Mininet is a powerful tool that can simulate the real network environment for various network tests.
Step 1: Install mininet
First, we need to install a mininet on the computer.You can find the latest version of Mininet on the official website of MININET or GitHub pages.According to the different operating system, you can choose different installation methods.For example, in Ubuntu, you can use the following commands to install Mininet:
$ sudo apt-get install mininet
Step 2: Create topology
Once the MINET installation is complete, you can start creating network topology.By writing the Python script, we can use the mininet library to create a custom network topology.The following is a simple example:
python
from mininet.net import Mininet
from mininet.topo import Topo
from mininet.cli import CLI
from mininet.log import setLogLevel
class MyTopo(Topo):
def build(self):
# Add host and switch
h1 = self.addHost('h1')
h2 = self.addHost('h2')
s1 = self.addSwitch('s1')
# Add connection
self.addLink(h1, s1)
self.addLink(h2, s1)
def main():
setLogLevel('info')
#
topo = MyTopo()
# E
net = Mininet(topo)
# # 网
net.start()
# CLI (command line interface)
CLI(net)
# Close the network
net.stop()
if __name__ == '__main__':
main()
The above code defines a simple network topology, which includes two hosts (H1 and H2) and a switch (S1).The switch connects these two hosts.Next, you can create and start the network topology by running the Python script.
Step 3: Run test test
After creating and launching network topology, various network tests can be performed by using the functions provided by the Mininet library.Here are some examples:
-The connectivity between test hosts:
python
pingall()
-The bandwidth of the host:
python
h1, h2 = net.get('h1', 'h2')
h1.sendCmd('iperf -s')
h2.sendCmd('iperf -c ' + h1.IP())
-The performance of network topology:
python
net.pingAll()
-The test network security:
python
h1.cmd('nmap -p 80 ' + h2.IP())
In addition to the above exceptions, MININET also provides many other functions and test options, which can be adjusted and expanded according to their own needs.
in conclusion:
Mininet is a powerful network simulator that provides a convenient method for network function and performance testing.By using the Mininet library, we can create custom network topology and conduct various tests to improve the design and optimization of the network system.
Note: The above code is only an example. In actual applications, corresponding modifications and configurations may be required according to specific requirements.Please refer to the official documentation and example code for further learning and practice.
