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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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UnboundLocalError: local variable 'start' referenced before assignment

I have error "UnboundLocalError: local variable 'start' referenced before assignment" when run the code def generateDestinationIP(start, end): first = 10 second = 0; third = 0; #eg, ip = "10.0.0.64" ip = ".".join([str(first),…
MKF
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Capturing traffic of two hosts in Mininet with Python

I currently have two hosts which run a client and server Python program which send TLS traffic to one another - I have tested this outside of mininet to confirm it works (and it does!). However, the goal here is to use tcpdump/tshark/wireshark to…
rshah
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How to connect a tap interface to the internet?

As a personal project I want to build a TCP/IP stack using C/C++ and using a tap interface. I have a wlan0 interface (wireless) that is connected to the internet. And now I want to send and receive packets from the internet through this wlan0…
Bechir Brahem
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Which package the YangInferencePipeline in yang parser library has moved to?

I upgraded my opendaylight yangtools libraries to 6.0.3 and the code breaks with the below errror(s): import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangInferencePipeline; The import cannot be resolved I am not sure to which…
raikumardipak
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How to mention "--switch=ovsk,protocols=OpenFlow13" while making a topology using Mininet() class in Python?

Look at the following command - $ sudo mn --controller=remote,ip=127.0.0.1,port=6653 --switch=ovsk,protocols=OpenFlow13 --topo=tree,depth=2,fanout=4 I want to achieve this topology using Python code. So far I have got the following lines in python…
Kshitiz Srivastava
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Opendaylight Aluminium with mininet torus

I am trying to connect my custom topology to the ODL controller using the command: sudo mn --topo torus,3,3 --controller=remote,ip=$OPENDAYLIGHTIP,port=6653 --switch ovsk,protocols=OpenFlow13 However, it gives 100% dropped on the ping test; I have…
Selçuk Keskin
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adding a new protocol to the packet by Scapy, but I do not see the field on the controller or Wireshark

I am trying to add a metadata field to the pkt by Scapy. I use mininet as a platform to launch my network simulation. from scapy.all import * from datetime import datetime class Metadata(Packet): name = "Metadata" fields_desc = […
user13946815
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How to create specific Qos rules?

I have the topology that is represented in the image: I want the hosts 1 and 2 to have high priority with max bandwidth 8mbps and the host(server) 4 to receive packets at maximum bandwidth of 4mbps. Host 3 is irrelevant for now. I have achieved the…
Jonathan Baxevanidis
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How to get dpid of a switch from the xterm of a host in mininet?

I have created a topology in mininet. I want to get the dpid or name of a switch from the host it's connected to using xterm or mininet's python API. I looked it up on google but couldn't find anything. Thanks in advance.
Hanzala Jamash
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Ping is not working on spine leaf topology on mininet

I am new in mininet and I want to know while I create spin leaf DataCenter topology and visualiz the topology using RYU controller the ping is not working. The Topology: ____[S1] [L1], [L2], [L3]------| …
Johonas
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Does Opendaylight still have a UI

I try to get the web interface of OpenDaylight controller (Magnesium Version). But I cannot install the features odl-restconf odl-l2switch-switch odl-mdsal-apidocs odl-dlux-all A web interface is still available in ODL controller?
loi219
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ONOS Service Start FrameworkEvent Error and GUI not ready yet

I have installed ONOS 2.3.0 on an Ubuntu Server 18.04.4 virtual machine running on Hyper-V following this steps (taken from here and here): Firstly, I have installed Java 11 (openjdk-11-jdk and openjdk-11-jre), maven and curl; then I have…
hwktmp
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Using POX controller to capture FIN packets in live traffic

I want write code using POX controller to capture the FIN packets in live traffic. How to find the FIN packets coming to the switch in pox controller ? Does flow_stats has the flags attribute? My question is in which function I get the details of…
Shalini Pv
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Missing Dependency for OpenDaylight controller app (Sodium SR1)

I am following the instructions here to write an simple hello world RPC: https://docs.opendaylight.org/en/stable-sodium/developer-guide/developing-apps-on-the-opendaylight-controller.html In the example HelloProvider class, the constructor is: …
LMC
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Floodlight controller routing algorithme

I recently started working with SDN and floodlight controller. I want to changing routing algorithme in floodlight by deleting the algorithm exist (Dijkstra algorithm), any link for that ?
Maher Bassi
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