Transcript SDN GUI Controller Lab

Software Defined Networking
Lab
Using Mininet
and the
Floodlight Controller
Last Update 2014.02.02
1.0.0
Copyright 2014 Kenneth M. Chipps Ph.D.
www.chipps.com
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Objectives
• See what an OpenFlow GUI based
controller looks like and how it works
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
2
Sources
• This lab uses the completely setup and
functional Mininet and Floodlight virtual
machine from Project Floodlght at
http://www.projectfloodlight.org
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Flow of the Lab
• In this lab you will
– Simulate a single switch, multi-host network
with Mininet
– Add flow rules to a flow table from a GUI
based controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
4
Anti Linux Rant
• Before we get to this lab which does work
- not without some wasted time and
considerable research, but successfully
nevertheless – let me vent a bit
• You see I spent hours trying to create this
lab using the OpenDaylight controller
• What a waste of time
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Anti Linux Rant
• Despite going through numerous sample
labs that alleged that the OpenDaylight
controller would run, l never got the whole
thing to work properly
• The problem in each case was the idiot
Linux command line
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Anti Linux Rant
• I reiterate my view that I have held from
1995 when I started using the Slackware
distribution of Linux to this week’s
experience with the Ubuntu distribution,
which is that Linux sucks
• And I mean it sucks big time
• In short I hate Linux
• Have none of the idiots who develop in the
Linux environment ever used Windows
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Anti Linux Rant
• A Windows install, even an Alpha or Beta
version, is so simple
• Download an exe file, run it, you are done
• Besides the excessive number of steps
required to install and setup OpenDaylight,
it runs in Java, which creates a whole new
set of problems
• Java has been a security risk and pain in
the rear since it was invented
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Anti Linux Rant
• Even worse are all of the steps that must
be done from the Linux command line in
subterrain directories
• In the sample OpenDaylight labs among
other things I am expected to change
directory using a string that is 97
characters long
• 97 characters
• Notice that they cannot spell either
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Anti Linux Rant
• Here are the directory instructions
– The source code of the OpenDaylight
Controller is in a directory called opendaylight
– In this directory (the coresponding directory in
the git repository is usually the
• distribution/opendaylight/target/distribution.openda
ylight-0.1.0-SNAPSHOTosgipackage/opendaylight
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Anti Linux Rant
• Even if you successfully get there without
a typo, the prompt is so long that you only
have two characters of room to enter
anything before it scrolls off to the next line
• Of course you then have to edit hidden
files in hidden places to make Java work
• The suggestion was to edit these,
assuming you can find them, using the vi
editor
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Anti Linux Rant
• vi ??
• Why don’t we just go back to living in
caves
• Why would anyone think the command
line is a suitable environment in the 21st
century
• Imbeciles
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Lab Setup
• Enough ranting
• I feel so much better now
• On to the lab setup
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Lab Setup
• About the time I was going to abandon this
effort I decided to try the Floodlight
controller
• I was amazed that it worked
• But it did
• So let’s see how to set it up so we can use
a controller instead of the command line to
enter instructions into the flow table
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Flow of the Lab
• The steps required to do this are
– Download the virtual machine
– Setup the virtual machine
– Check the setup in Linux
– Create the network
– Enter flow table entries from the controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
• The first step is to acquire the Floodlight
virtual machine
• Unlike the convoluted setup procedure
required for OpenDaylight the Floodlight
folks have created a virtual machine with
the Floodlight controller already installed
and ready to go
• Smart folks
• The virtual machine is found here
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
– http://www.projectfloodlight.org/floodlight/
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
• Click on the Download link in the menu bar
• Scroll down
• On the right side click on
– Download
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Acquire Floodlight VM
• Unzip the file
• Remember where you put it
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• This is a VMware virtual machine
• It will also run in VirtualBox
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• Once the files are unzipped they must be
loaded into VMware
• Start VMware Player
• Click on
– Open a Virtual Machine
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• Navigate to where the vmx file is stored
• Click
– Open
• The virtual machine will appear in the
virtual machine list in the left panel
• Click on
– Play the virtual machine
• toward the bottom of the right panel
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• Don’t’ bother with the VMware tools for
Linux
• Once it is ready the screen should look
like this
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• Even though this is a VMware created
virtual machine it can be opened in
VirtualBox
• To do this download the appliance shown
below this lab’s link
• Extract the files from the zip file just
downloaded
• Start VirtualBox
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• Under the File menu select
– Import Appliance
• Navigate to where the zip file was
expanded
• Select the ovf file
• Click
– Next
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• Once the appliance is imported select it in
the left pane
• Click
– Settings
• Select
– Network
• Change the adapter to
– Host-only Adapter
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
• Click
– OK
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Setup the Virtual Machine
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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The Virtual Machine
• Start the virtual machine as you would any
virtual machine
• Login using
– floodlight
• As the username
• There is no password
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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The Virtual Machine
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Record the IP Address
• Run ifconfig
• Write down the IP address of this virtual
machine
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Record the IP Address
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Create the Network
• To start Floodlight at the command line
enter
– sudo mn
• This will create a network with
– Controller using Floodlight
– Switch named s1
– Host named h2
– Host named h3
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Create the Network
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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What is Mininet
• For this lab on SDN we will be using
Mininet to create the SDN hardware and
OpenFlow commands to define how the
hardware acts
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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What is Mininet
• Mininet is a network emulator, not a
simulator
• It can be used to create virtual hosts,
hubs, switches, controllers, and links
• The code used in Mininet can be used with
no or minimal changes on real SDN
OpenFlow networks
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Connect to the Controller
• To connect to the controller go to the host
operating system
• Start a web browser
• Google Chrome works best for this as
Internet Explorer is missing some add in
as it only shows part of the page
• Likely something to do with Java again
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Connect to the Controller
• Enter this
– http://192.168.13.131:8080//ui/index.html
• Where 192.168.13.131 is the IP address
shown when ifconfig was run above
• This screen will appear
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Connect to the Controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
• Let’s look around
• Click on
– Topology
• This shows the network layout created by
the sudo mn command
• Here we have one OpenFlow switch and
two generic hosts
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
• Click on
– Switches
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
• Click on the number in blue just below
DPID
• This will appear
• It shows us the active ports and the flows
being managed by the controller and sent
to the switch
• Notice that there are none as no traffic has
crossed the network as the Flows shows 0
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
• Let’s cause the switch to ask the controller
for instructions so that a set of flow rules
will appear in the flow table
• This will be reactive mode since the switch
will ask the controller what to do
• The controller will respond with a set of
flow rules for the flow table
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
• To cause this go to the mininet prompt and
enter
– h2 ping h3
• Return to the virtual machine running the
browser
• Notice the two flow entries now shown
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Examine the Controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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Summary
• We now have a fully functioning Software
Defined Network being controlled by an
OpenFlow controller
Copyright 2014 Kenneth M. Chipps Ph.D. www.chipps.com
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