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Questions tagged [sdn]

Software-defined networking (SDN)

Software-defined networking (SDN) is an approach to computer networking which evolved from work done at UC Berkeley and Stanford University around 2008. SDN allows network administrators to manage network services through abstraction of lower level functionality. This is done by decoupling the system that makes decisions about where traffic is sent (the control plane) from the underlying systems that forward traffic to the selected destination (the data plane). (source)

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Is there a way to retrieve application layer data on the SDN controller from Mininet hosts?

I would like to send application layer data from a program running on a Mininet host to the SDN Pox controller. Is this possible, or does this break with the SDN paradigm? Ie. I wish to mininet> h1 python
TheSjiraffen123
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How to solve IPAddr object has no attribute split error

Here is my code from pox.lib.addresses import IPAddr def ip_atoi(st): """ function to convert ip address to integer value """ st=st.split(".") return int("%02x%02x%02x%02x"%(int(st[0]),int(st[1]),int(st[2]),int(st[3])),16) when i run this…
Om Prakash Kumar
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NeXt UI in OpenDayLight Be

How to install and use NeXt(Network centric topology)UI feature of ODL Be? I have only theoretical knowledge of NextUI, so someone can explain in detail how to view the topology using NextUI. Thanks in advance!!
Bhavana
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Custom Mininet Topology ping error

i am building custom topology in Mininet Emulator, I successfully creater topology which is displayed on the picture but I have a problem with ping between h1 and h2. They are connected to same switch s1 and they are in same subnet. I am getting…
forgatn
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Setting controller IP in Ryu for physical switch

I am new to Ryu and trying to set it up with a physical switch connected to a VM on my computer. The switch's controller is set to 10.0.1.8 and I am trying to set the same on ryu controller. I used the following commands: sudo ovs-vsctl add-br…
alamba
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Mininet Ping Packets not visible in floodlight controller

I have set up a floodlight controller in eclipse and I have overriden net.floodlightcontroller.core.IListener.Command receive( IOFSwitch sw, OFMessage msg, FloodlightContext cntx) method in my module. I am running mininet with minimal topology. My…
Yellowjacket
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Pica8 SDN whiteswitch ping from mangement console to host port

I am connecting my controller PC to a Pica8 white switch via the Management port. I can SSH into the switch and ping the controller PC, however I cant ping the hosts through the standard ports. I have created a bridge of the first four ports and…
SJP
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How to make list accessible outside if statement?

I would like to access the list outside the if statement, is there any static function in python? List are switch1Flow, switch2Flow and switch3Flow: Here is the code def startingNode(self, destID, message, counter): pack = …
pythonbeginer
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Application Composition in Software-Defined Networking (SDN)

I have seen that many current SDN controller platforms like OpenDaylight, Floodlight or the HP VAN SDN controller allow to write SDN applications as independent modules. It seems like you can run multiple applications side by side. With the HP SDN…
Matthias
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live migration in software defined networks

Iam new to the concept of software defined networks and need to know what is exactly is live migration in SDN and how it can be implemented ? also if you can point me to resources about this subject i would be thankful.
Talal Omer Hassan
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Save my own topology:Mininet

I'm a newer in Mininet, I started my topology with CLI command: "sudo mn", after that, I'm adding some hosts and switches... but I want to save it for the next time. How can I do it? Example: …
Kati Dev
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Opendaylight YANG RPC modelling for anyxml /anydata types

Does Opendaylight(Beryllium) support YANG RPC data modelling types like anyxml/anydata ? I have been involved in developing an Opendaylight Controller App, in which i have to publish a dynamic JSON data as part of RPC(NorthBound API). Here is my…
Jayaprakash
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How Pox controller will send packet without installing flow rules

I am writing worm detection code using pox controller can anyone tell me how to write a function where my controller will send packet to host directly i mean suppose host A send ****TCPSYN**** packet to host B now as flow rules not available than…
Om Prakash
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Flow entries for traffic monitoring in SDN

I'm trying to install flow entries for traffic monitoring in SDN. I wonder if I can set the action as "continue indexing the flow table"? Here is one scenario: A layer 2 switch with one existing flow entry: "match:dst_mac=00:01, action:outport=1,…
goldsaint
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host_tracker module not working

I want to use the host_tracker module in POX. I have a tree topology running with mininet. In the pox console, I run this command $./pox.py host_tracker openflow.discovery When the links are detected I try to ping from my mininet console, $h1 ping…
Anusha
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