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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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POX: Connection reset in OpenFlow

1) I am trying to install 2 flow rules into multiple switches. 3) Once the first rule is installed in a switch, connection will reset and second rule fails to install in the same switch. 4) Code snippet is as following: for x in…
Explore_SDN
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As through "dpctl" we can play with the switches. I was wondering is there any command(s) which can help us manipulating controller in Mininet?

By using "dpctl" command we can see/ add flows, modify ports behaviors, see statistics of switches etc. I was wondering is there any command(s) which can help us manipulating controller in Mininet as we do with the switch with dpctl command?
zafar malik
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hub: uncaught exception -> KeyError:

I have made a controller using Ryu which handles the paths and switches. The code seems to be working but I receive the following error. It is asynchronous meaning it does't seem to be related to any event and happens every once in a while. The…
Ehsan Ab
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get_all_link(self) outputting all possible LINKs for a topo

I have topo with 4 switches and 4 hosts. The switches construct a loop. My goal is to learn the topology of the network when switches are connected to the controller. The problem is that the function get_all_links() returns all of the possible…
Ehsan Ab
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How to install Defense4All for OpenDaylight?

(This is a duplicate question from ServerFault, but seems that is not a right place to ask and it got downvoted for no reason, so I re-post here) Basically I am setting up an OpenDaylight controller for my SDN. And I am trying to install an…
Victor Wong
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What's the relationship between physical and network in could computing?

I know in cloud computing, we can easily add VM-instances into a logical sub-network or vice versa. In the real world, however, all the VMs are running on physical machines, and all the physical machines are interconnected via cables and network…
Douglas Su
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Customising Open Flow Controller Behaviour for inserting switch policies ?

I'm working on a research project on SDX (Software Defined Exchange).Current SDX implementation given here https://github.com/sdn-ixp/sdx only uses a single switch connected to a single controller for packet forwarding. My research goal is to…
Muhammad Safi
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Porting RIP ON SDN as an application

I have been insisted to "Port RIP On SDN" as my final year project. But my doubt is like when the controller has an intelligence of routing , whys RIP on SDN. Is there any other advantage of using RIP as an application in SDN ? Is this a valid…
sindu ravi
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Unable to build Floodlight Controller Package Eclipse

I am working on using Floodlight Controller for SDN. I used ant eclipse to setup the Eclipse files and then changed the Build Configuration as desired in the installation instructions. I am getting the following compilation error in the package…
psiyumm
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Where to store .py files when i need to execute them in mininet

I'm new to mininet and python. I have set up ubuntu on virtual box and i'm running mininet on it. I've set up putty and xming server as well. I am successfully able to ssh into mininet using putty. I'm able to run commands and create custom…
mv93
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Opendaylight API can't select node for creating flow

I'm new to SDN and I'm trying the opendaylight controller. I have set it up with running web API and I can't add flows but it recognizes my topology. I use mininet to create the topology. Opendaylight helium 2.0. Does anybody know why i can't select…
Laurenz De Winter
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Need some explanation about Software-defined networking (SDN)

Can anyone give me an example of data plane and control plane in the 'traditional' model i.e when SDN does not apply. I understand how SDN works, but I don't really know about the traditional model. In SDN, the data plane and control plane are…
xtiger
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Get a set of subnets/adresses from IP range

I'm looking for a good algorithm (or code if you speak it better than English) to do the following: For a given IP range (e.g. 1.1.1.1 - 1.1.2.247), find the smallest combination of subnets/addresses that includes all the IPs in the specified range.…
Yevgeny Khodorkovsky
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How can I use @Query result in SDN3?

I'm using Spring Data Neo4j 3.0.0 in my web site. I have some problem doing develope. I use @Query Annontation in @NodeEntity model class. @Query(value = "START a=node({self}) MATCH (a)<-[:`COMMENT_TO`]-(b) RETURN b ORDER BY b.createdAt…
reperion
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SDN OpenDayLight (Aluminium SR2) SDN Link State Family

I have established a PCEP session between ODL (Aluminium SR2) and a vMX router. I'm now following instructions on ODL web page "https://docs.opendaylight.org/projects/bgpcep/en/latest/bgp/bgp-user-guide-linkstate-family.html#bgp-peer" I've enabled…
JohnM
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