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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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Understanding Ryu OpenFlow Controller, mininet, WireShark and tcpdump

I am a newbie to OpenFlow and SDN. I need help setting up the Ryu OpenFlow controller on a Ubuntu or Debian machine and understand a basic Ryu application. Note: this question already has an answer.
user5104026
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Why can't terraform SSH in to EC2 Instance using supplied example?

I'm using the AWS Two-tier example and I've direct copy-n-pasted the whole thing. terraform apply works right up to where it tries to SSH into the created EC2 instance. It loops several times giving this output before finally…
n8gard
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What is management plane in SDN?

I was reading about SDN technology and its concept of a 'management plane' along with data plane and control plane. I understand the other two, but what is management plane? Is it any kind of simple GUI interaction for operators or it is more than…
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What if there are multiple forwarding rules for the same flow in the Openflow switch?

I am trying to use the POX controller to control the path of flows. I know that the Open vSwitch will choose the forwarding rules that have the highest priority. But what will happen if I insert a new forwarding rule for the existing flow with the…
lzhou008
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What exactly is Software-Defined Networking (SDN)?

I was poring over the docs for Open DayLight, and can't seem to wrap my head around what software-defined networking even is. All the media hype, blogs and articles I can find on SDN are riddled with buzzwords that don't mean anything to me as an…
smeeb
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ovs tap "internal" vs tuntap tap

I'm building an SDN testbed consists of an OpenvSwitch switch installed on Linux Ubuntu 18.04 and 5 VMs (Linux Ubuntu 16.04 server) running on VirtualBox. The OVS is managed by OpenDaylight Boron. When I use ip tuntap add mode tap tapN to create…
Ahmed Sallam
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What alternatives SDN controllers to POX are available?

I would like to get your advice about the best open-source SDN controller available. I want to implement and test some ideas I have in my research so I need to use a simulation such as Mininet. In fact, I am familiar with mininet and able to deal…
Friddy Joe
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NameError: name '_name_' is not defined

I have gone through the similar question in stackoverflow but couldn't find the answer close to my problem. In the code below the 3 line before the last line is giving Error - NameError: name '_name_' is not defined I have copied the below code…
Cin Sb Sangpi
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javax.crypto.AEADBadTagException when connecting to Floodlight Controller

I am trying to establish a TLS connection between my Java Client and the Floodlight SDN controller (https://github.com/floodlight/floodlight). Every time I try to decrypt the first message Floodlight sends after the handshake, a AEADBadTagException…
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Floating IP not pinging externally

I have successfully deployed everything in Redhat Openstack 11 with following settings. I was not able to ping the floating IP externally rather i can perform ping, ssh and other things using namespace. I have three controllers and two hypercoverged…
Sathiya Moorthy Karan
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OpenDayLight DLUX login: Unable to Login

This seems to be a common issue but I haven't found a solution that actually works. I've tried installing both Lithium and Helium on Ubuntu using the Installation Guide from the wiki. Following this guide the only feature that gets installed is…
Alan
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Virtual switch using SDN

I was going through SDN controllers and OpenFlow implementation. I was wondering if SDN could be used to create a virtual switch by combining the capabilities of several switches within a data center. 1) Can any of you help me with this? 2) Are…
user3778271
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use of Scapy to generate network load on mininet

I am doing research on SDN using mininet, however i have to generate specific traffic load on the links by parsing a txt file in python, since Scapyhttp://www.secdev.org/projects/scapy/ gives python API for send packets over network. but i could not…
Gulzi
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Opendaylight, Mininet and Ubuntu. No ARP, no ping

Summary: I am unable to ping between hosts using Opendaylight and Mininet, and would appreciate some guidance as to what may be the problem. Setup and what I've done so far: I've been stuck on this for two days now and can't seem to find anything…
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what is the difference between ovs and ovsk?

when running mininet topology, we can use ovs or ovsk for --switch argument in mininet's mn command, for instance: mn --custom topo.py --topo topo --mac --switch ovs --controller remote mn --custom topo.py --topo topo --mac --switch ovsk…
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