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Mininet

Mininet is a lightweight software-defined networking and testing platform It uses lightweight virtualization technology to make a single system look like a complete network running related kernel system and user code. It can also be simply understood as a process-based virtualization platform in SDN network system. It supports OpenFlow, OpenvSwith and other protocols. Mininet can also simulate a complete network host, link and switch on the same computer and facilitate interactive development, testing and demonstration. Especially those who use OpenFlow and SDN technology At the same time, the code under the virtualized platform of this process can also be migrated to the real environment.

Characteristics of Mininet

You can simply and quickly create a network topology that supports user definition, shorten the development and test cycle, run real programs, and basically all programs running on Linux can be run on Mininet, such as WiresharkMininet supporting Openflow, and code running on Mininet can be easily ported to hardware devices that support OpenFlow. Mininet can run on its own computer, or server, or virtual machine. Or run Mininet on the cloud (such as Amazon EC2) to provide python API, easy to use Mininet is an open source project, the source code is here: https://github.com/mininet

Install Mininet

Get the source code

Git clone git://github.com/mininet/mininet

Enter the directory

Cd mininet

Complete installation

. / util/install.sh-a

For the first time, I don't know what information to configure. It is recommended to install it completely.

test

Sudo mn-test pingall

View mininet version

Mn-version

Other installation commands

# install.sh-a # # full installation (installed in home directory by default) # install.sh-s mydir-a # # full installation (installed in other directories) # install.sh-nfv # # install Mininet+ user switch + OVS (installed in home directory) # install.sh-s mydir-nfv # # install Mininet+ user switch + OVS (installed in other directories)

Create a very simple data center network

Data center networks usually have a tree topology. The end host is connected to the top-of-rack switches that form the edges of the tree, one or more core switches form the root, and one or more aggregation switch layers form the middle of the tree. In a basic tree topology, each switch (except the core switch) has a single parent switch. Additional switches and links can be added to construct a more complex tree topology (e.g.fat tree) in an effort to improve fault tolerance or increase inter-rack bandwidth.

In this task, your task is to create a simple tree topology. You will assume that each level, core, aggregation, edge and host, consists of a single-layer switch / host with a configurable fan-out value (k), which looks like:

Summary

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