Tema 3.- CASTADIVA PROJECTTema 3.- CASTADIVA PROJECTPerformance Evaluation of a MANET architecturePerformance Evaluation of a MANET architecture

Redes Inalámbricas Ad Hoc Máster Ingeniería de Telecomunicación, Universidad de Málaga 2008/2009Redes Inalámbricas Ad Hoc Máster Ingeniería de Telecomunicación, Universidad de Málaga 2008/2009

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2Introduction.

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Currently there are several routing protocols under development for MANETs.All th t l t t d i i l t lik NS 2 (N t kAll these protocols are tested in simulators like NS-2 (Network Simulator 2).

Does not generate fully realistic resultsDoes not generate fully realistic results. Need extra specific implementation for these simulators.

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3Objectives

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Generate a test bed using a real network.This test bed can create real traffic among nodes.E l h bili f dEmulate the mobility of nodes.

Must be compatible with the most extended simulator – NS-2 –for comparison purposesfor comparison purposes.

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4Architecture.

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Divided into the Castadiva core and network parts.

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5Architecture: core.

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The core of Castadiva is a server.Main functions:

Allows the user to interact with the system.Coordinate all nodes during an experiment.

Objective:Objective:Easy interface.Low use of computational resourcesLow use of computational resources.

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6Architecture: nodes.

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Low cost off-the-shelf devices.Must connect to both a wired network and a wireless one.M us co ec o bo a ed e o a d a e ess o eThe system must be easily scalable.

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7Architecture: networks.

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Two different networks:Coordination Network: wired network to send instructions to all nodesnodes.Wireless Network: Composed by the wireless nodes and defined by the Castadiva’s GUI on each simulation.

The coordination network does not jam the simulation!

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8Implementation.

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The core is developed in a Linux System with a JavaM The core is developed in a Linux System with a Java Virtual Machine.The core connects to each node through both SSH and NFSNFS.

SSH: to coordinate the experiment among nodes.NFS: to share all files among nodes and the coreNFS: to share all files among nodes and the core. Use the coordination network for this purpose.

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9Implementation.

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Each node is an OpenWRT system (Linux-based firmware)M Each node is an OpenWRT system (Linux based firmware).Supports both SSH and NFS connections.Allow executing BaSH scripts and our own applications in C or CC++.

Extra applications installed:Iptables to simulate network topologyIptables to simulate network topology.TcpFlow to generate TCP traffic among nodes (developed by our group).UdpFlow to generate UDP traffic among nodes (developed by our group).

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10Implementation.

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11Implementation.

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12Castadiva’s GUI.

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Objectives.

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jEasy use and configure.Allows the user to generate different network topologies.E l t d bilitEmulates node mobility.Generates different traffic connections among nodes.Can also generate random scenariosCan also generate random scenarios.Integrates with different routing protocols.Allows to plug in external devices like webcams.

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009 What can do Castadiva?

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With an easy interface, we can define a network topology.p gyWith iptables Castadiva emulates the node visibility. If one node is out of range from other, iptables delete allone node is out of range from other, iptables delete all incoming packets with the MAC of this node.Changing the iptables each second, Castadiva emulatesChanging the iptables each second, Castadiva emulates the mobility among nodes.

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009 What can do Castadiva?Simulation Variables Node configuration.

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In the blackboard the usercan put the nodes only clicking

The user can

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by the mouse.The user canselect the routingprotocol

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At last we can control the emulation.

...And Castadiva report the state of the emulation.

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15GUI.Easily the user emulate the network topology in

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y p gyall desired routers.

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All routers have been configured previously.

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The user can define the traffic among nodes.

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gDefine the starting and ending simulation time of each traffic flow.Select traffic TCP and UDP.Change the common parameters of traffic:

For TCP: total transfer size.For UDP: size of packet, packets per second and total packets.

C t di t th l bt i d i th l ti f hCastadiva returns the values obtained in the emulation for each traffic flow.

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17GUI.

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Allows generating both UDP and TCP traffic among nodes.M Allows generating both UDP and TCP traffic among nodes.

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009 GUI.

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M Results of theemulation.

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009 What can do Castadiva?

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Castadiva can also make random emulations.

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The user choose some parameters:How many nodes in each simulationHow many nodes in each simulation.How many times repeat each simulation.Protocols to compareProtocols to compare.How many traffic flows must to be in the simulation and the characteristic of each one.

Castadiva create new random simulations with this parameters.

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parameters.

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20GUI.

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All emulations can be done randomly to make severalM All emulations can be done randomly to make several tests.

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21GUI.

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Allows to add extra devices to generate different traffic flowsM flows.

The extra device can be a laptopto add more specific trafficto add more specific traffic.

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009 What can do Castadiva?

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Other classic control functionality:L d/S th j tM Load/Save the project.Configure the system and the access points.I t t NS 2 C t di i t i d d bilitImport to NS-2: Castadiva can import scenarios and node mobility from NS-2.Export to NS-2: Castadiva can export traffic scenario and nodeExport to NS-2: Castadiva can export traffic, scenario and node mobility to NS-2.Etc.Etc.

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23Evaluation.

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Verify the behavior of the entire system.M Verify the behavior of the entire system. Compare it with the NS-2 simulator: Can export/import NS scenarios. Create different experiments with UDP and TCP traffic.

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24Evaluation.

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UDP: packet delivery rate.

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Without routing protocol With routing protocol

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25Evaluation.

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TCP: throughput.

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Without routing protocol With routing protocol

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26Conclusions.

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Castadiva is a tool to improve research in MANETsM Castadiva is a tool to improve research in MANETs. It can generate both TCP and UDP traffic and supports external devices to inject real traffic.jIt is compatible with NS-2.We are currently using this tool to test attacks to MANETs.y g

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27Download software and more.

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Software download : http://www.grc.upv.es/6software.html

M http://castadiva.sourceforge.net/

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