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For questions about Mininet a network emulator running a collection of end-hosts, switches, routers, and links on a single Linux kernel.

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2answers
35 views

Direct packet forwarding by controller

In a SDN network when a switch receives a packet for which it can not find a match in its flow table, it will forward this packet to the controller. The controller will decide about this packet and ...
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1answer
21 views

Add a flow to OVSK for communication

I have created a torus topology in mininet by enabling sflow and connecting to POX controller for topology discovery. Below is the command. sudo mn --custom=sflow-rt/extras/sflow.py --link tc,bw=10 --...
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0answers
23 views

Mininet CLI output redirect

I am running a custom topology in Mininet and would like to get bandwidth between each switch. When I try Iperf s1 s2, I get the results which is good. Now I want the output to redirected to a file. ...
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1answer
41 views

Iperf connection refused using mininet

I have created a topology using below command and using POX as a remote controller. sudo mn --switch=ovs --link tc,bw=10 --topo=tree,depth=2,fanout=2 This creates a topology with 1 controller, 3 ...
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0answers
49 views

Dynamic adding host with a quagga service MiniNExT object

I am using MiniNExT to emulate a network topology with Quagga routers. I cannot create a topo class and pass to MiniNExT as shown here since the network changes dynamically. Is there a way to add a ...
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1answer
51 views

Default Action in SDN Controller

In legacy IPv4 networks there exists a default route concept for routers where a router does not need to know exact destination of IP packet. Is there a default action concept for SDN switches? Let ...
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0answers
204 views

Ryu book Example of the operation of QoS by using Meter Table doesn't work

I am using mininet with Ryu controller. I almost followed the same procedure as explained in the Ryu book for Example of the operation of QoS by using Meter Table but I made a little modification in ...
1
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1answer
157 views

How to configure VLAN?

I have simple tree topology network. I want to configure VLAN on this network, PFA the image. Am I wrong? Can VLANs actually be configured like this. I have setup this topology on mininet. More of ...
1
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1answer
77 views

How ethernet links can have a delay and loss

In some simulation environment, such as mininet, you are given parameters when you define your virtual link between switches such as: bandwidth, delay, and loss. I understand a link has a bandwidth ...
0
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1answer
52 views

OpenFlow takes some seconds to apply rule

Is there a delay for openflow rules added with ovs-vsctl tool? I am successfully limiting the traffic of a specific interface with: ovs-vsctl set interface s0-eth1 ingress_policing_rate=128 ...
2
votes
2answers
439 views

Problem with a n host, zero switch topology in mininet

I am experimenting a bit to gain a better understanding of Mininet and Openflow. I have built a topology with n hosts in a line and no switches. Strangely, host 1 and host 2 can ping each other but ...
1
vote
1answer
705 views

Problem configuring QoS with FlowVisor and OpenVswitch

I am running a small experiment to isolate bandwidth with flowvisor (version 1.4, version 1.0 of openflow) implementing a port based slicing. With mininet, I create a topology that consists of a host ...
3
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1answer
553 views

Application aware routing in software defined network

For the last couple of months i am delving into SDN and trying to implement the application aware routing through SDN . Application aware routing: SDN controller will route each application data ...
1
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1answer
462 views

Get packet loss from Open Flow switch

I am using an Ryu controller (3.22) to monitor switches (Open vSwitch 2.0.2, supporting Open Flow 1.3), which are a part of virtual network created using mininet (2.1.0). It is a tree topology with ...
4
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1answer
2k views

Decoding packets in an OpenFlow ryu switch

I'm trying to examine a simple OpenFlow ryu switch, and get out of it the destination and source addresses. I'm using Mininet. For example for the next commands: h1 python -m SimpleHTTPServer 80 &...