Bob Lantz
c3a4440025
There is probably a better way of doing this, but currently parseCustomFile can modify globals (e.g. TOPOS) as well as instance variables (self.validate) and classes (e.g. MyTopo), which are also in the global name space. Inconveniently enough, lambdas don't seem to be full closures in Python; if they were, this trickiness would be unnecessary. Even so, using execfile() seems like it might be a bit dubious...
Mininet: A Simple Virtual Testbed for OpenFlow
aka
How to Squeeze a 1024-node OpenFlow Network onto your Laptop
(Extremely Experimental Development Version 0.1, December 2009)
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Mininet creates simple OpenFlow test networks by using process-based
virtualization and network namespaces.
Simulated hosts (as well as switches and controllers with the user
datapath) are created as processes in separate network namespaces. This
allows a complete OpenFlow network to be simulated on top of a single
Linux kernel.
Mininet provides a set of Python classes and functions which enable
creation of OpenFlow networks of varying sizes and topologies.
In order to run Mininet, you must have:
* A Linux 2.6.26 or greater kernel compiled with network namespace support
enabled. (debian-testing seems to have such a kernel, but it doesn't
work for compiling nox, unfortunately.)
* The OpenFlow reference implementation (either the user or kernel
datapath may be used, and the tun or ofdatapath kernel modules must be
loaded, respectively)
* Python, bash, ping, iperf, etc.
* Root privileges (required for network device access)
* The netns program (included as netns.c), or an equivalent program
of the same name, installed in an appropriate path location
* mininet.py installed in an appropriate Python path location
Currently mininet includes:
- A simple node infrastructure (Host, Switch, Controller classes) for
creating virtual OpenFlow networks
- A simple network infrastructure (class Network and its descendants
TreeNet, GridNet and LinearNet) for creating scalable topologies and
running experiments (e.g. TreeNet(2,3).run(pingTest) )
- Some simple tests which can be run using someNetwork.run( test )
- A simple command-line interface which may be invoked on a network using
.run( Cli ). It provides useful diagnostic commands, as well as the
ability to send a command to a node. For example,
mininet> h11 ifconfig -a
tells host h11 to run the command 'ifconfig -a'
- A 'cleanup' script to get rid of junk (interfaces, processes, files in
/tmp, etc.) which might be left around by mininet. Try this if things
stop working!
- Examples (in examples/ directory) to help you get started.
Batteries are not included (yet!)
However, some preliminary installation notes are included in the INSTALL
file. Good luck!
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Bob Lantz
rlantz@cs.stanford.edu