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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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How to change routing algorithm of openflows(switch) Opendaylight?

I am new in Open-daylight . I run a topology in Mini-net then make traffics with D-IT-G . I want to route this traffics with Dijkstra's algorithm but i don't know how . How can i change default algorithm please help me step by step ?
Omid Erfanmanesh
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Host with multiple interface to forward packets to next hop

I am trying to have host with multiple interface at Mininet and ping from h1-h2 (topology can be seen from the attached figure). If I have flow rules at S1 to send packets over 3rd output port, directly to the S2 switch it works fine. But if i try…
aydeger
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Getting OpenFlow rules from a datapath

In Ryu Controller, for a selected datapath, how can I get the OpenFlow rules from the switch? For example, for the rule below: cookie=0x0, duration=18575.528s, table=0, n_packets=1, n_bytes=98, priority=1,ip,in_port=3,nw_dst=10.0.0.1…
Anamort
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how to set traffic statistics in mininet?

I want to make testbed for testing the my own algorithm in mininet. I want to setup link data traffic rate, control traffic rate and link processing rate. but i am not able to it. if anyone have idea how to set up all these. please help…
abha
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Get Openflow version of connected switch using opendaylight

I am writing a module in Opendaylight, which needs access to OF version of the connected switch. Through Node.java + FlowCapableNode.java I am able to get little info about the switch, but I am not able to get the OF version of the switch. I have…
invoker
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openvswitch is still forwarding with fake controller

I'm playing with sdn things, my test configuration is : openwswitch in a VM with 2 other VMs connected to it(all running Ubuntu 14.04 in VirtualBox): vagrant@ovs:~$ sudo ovs-vsctl show 8c1ee033-7bf1-4640-9019-67dd3482f96c Bridge "ovsbr0" …
Alter_so
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Parsing Packets as they get received by a switch in Mininet

I have been reading about creating a learning switch in Mininet with different controllers (POX, Ryu ..etc). However, there are few things which are not clear to me and I hope to get help from here. My questions is: I need to have control over the…
OiaSam
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How to add scapy traffic in mininet?

I know that we can use scapy to create packet but how to detect this packet in controller of mininet (It can be any controller like POX, Pyretic, Frenetic, RYU, etc). Can anyone explain this with the proper code to run in mininet environment?
Lohit Barki
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How to decrement the ttl/hoplimit of packets at OpenFlow switches?

I know it is possible to add or modify single flows of OpenFlow switches to decrement the TTL(IPv4) or the hop limit (IPv6). I tested it with the floodlight controller and the following flow entry ovs-ofctl -O OpenFlow13 add-flow s1…
Simon Schürg
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How to do a mininet hard shutdown for switch

With mininet is there a way to make the switch do a hard shutdown (ie power cord pulled) so that the normal graceful switch going down messages are not sent to the controller?
P D
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how to can install mininet v2.0.0 on ubuntu 14.4?

how to can install mininet v2.0.0 on ubuntu 14.4? I've installed Ubuntu in a virtual machine (vmware workstation) ubuntu version 14.4, now I want to install the mininet v2.0.0,but I have no solution, please guide me. Thanks
behnam
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How to set OpenvSwitch to evict newest flows when memory is full instead of the oldest ones?

I am currently trying to overflow the OvS controller with the flow tables and make it reject new rules and subsequently, new packets. I found this in documentation: Flow Table Configuration Limit flow table 0 on bridge br0 to a maximum of…
DoeDan
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Dataset for frequent traffic prediction in SDN

I'm developing a framework to predict upcoming traffic in Software defined network based on previous traffic. But I don't have any kind of dataset available with me to test and evaluate the framework. How to generate the test dataset or is there any…
Bansal
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Java Code for Calculating Packet Per Second

I have method that receives packets from switch to floodlight controller in SDN which is mean this method is triggered for every new coming packet. I want to calculate the packet per second in that method. This is my attempt; it is correct? int…
user1888020
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Error to add nw_dst as a Match field while working with OpenFlow v1 in ryu

I am using RYU controller with flowvisor. As flowvisor do not support any other version other than openflow v1. I am using openflow v1 in my project. I have topology of 3 ovs switches and controller sits in one of server conataining ovs bridge.…
explorer
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