Performance Studies on Campus-Wide Focus on FTP, Video and VoIP Ethernet Network

Performance Studies on Campus-Wide Focus on FTP, Video and VoIP Ethernet Network

Nuru I. Sarkar, Kashif Nisar, Layangi Babbage
Copyright: © 2012 |Pages: 11
DOI: 10.4018/japuc.2012010106
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Abstract

The Advanced Network Technologies is research that investigates technology(s) behind today’s modern networks and network infrastructures. One part of this technology being Asynchronous Transfer Mode (ATM). A technology commonly in place in networks all around the world today. This paper focuses on ATM. Dubbed “Modelling and Performance Studies of ATM Networks”; this research seeks to look at and into the “impact of application segment length on the performance of an ATM network” and the “impact of traffic type data on the performance of an ATM network”. To be able to examine an ATM network, the authors need to be able to simulate a network. Thus, for this research, they have used the OPNET Modeler 14.0 Simulation software to create a network model that represents a ATM network. By actually simulating an ATM network at AUT University New Zealand, the authors can therefore change certain variables, and observe the effects the changes have on performance. As stated, one of the impacts that will be explored is the effect that application segment length has on an ATM network. Thus, one variable that will be changed in the authors’ simulation is the segment length. This is the length of each packet segment that is sent through the network for a particular traffic type. The second impact to be inspected is the impact of different traffic types on an ATM network. This network model is based on a campus network. An Application Configuration is setup with default parameters which specify 8 common applications used. Among them the ones that the authors will focus on are VOIP, Video and FTP. A Profile Configuration is setup that will define the 3 applications stated above. A fixed node model of 100BaseT will specify the profile configuration for each scenario and the number of work stations of each scenario.
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1. Introduction

This network model is based on a campus network. An Application Configuration is setup with default parameters which specify 8 common applications used. Among them the ones that I will focus on are VOIP, Video and FTP (Chong & Matthews, 2004; Lindgren, Almquist, & Schelen, 2002). Voice packets are transmitted over IP-based networks. VoIP is a real-time application and transmits the voice on a Real-Time Transport Protocol (RTP), User Datagram Protocol (UDP) and Internet Protocol (IP) over networks (Cai, Ling, Shen, Mark, & Cai, 2009). Each voice packet is small in size and the voice packet has the headers: RTP (12 bytes), UDP (8 bytes), and IP (20 bytes) headers. The data-link layer Medium Access Control (MAC) has a (34 bytes) header. All these headers sum up to 74 bytes of overhead in the VoIP application. The Session Initiation Protocol (SIP) was considered to handle a multimedia call setup and H.323 is considered by ITU to allocate IP-based phones on the public telephone network to talk to a PC-based phone over IP-based networks (Ehlert, Zhang, & Magedanz, 2008). It is a standard that specifies the components, protocols and procedures for multimedia communication services such as real-time audio, video and data communications over IP-based packet networks (Hasbullah, Nisar & Said, 2009; Nisar, Said, & Hasbullah, 2010). A Profile Configuration is setup that will define the 3 applications stated. A fixed node model of 100BaseT will specify the profile configuration for each scenario and the number of work stations of each scenario. Ethernet Servers and Ethernet switches have been used linked with 100BaseT Duplex links.

The following scenarios have been implemented:

  • •

    FTP Traffic on a network with 2 workstations

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    FTP Traffic on a network with 10 workstations

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    FTP Traffic on a network with 50 workstations

  • •

    FTP Traffic on a network with 100 workstations

  • •

    VOIP Traffic on a network with 2 workstations

  • •

    VOIP Traffic on a network with 10 workstations

  • •

    VOIP Traffic on a network with 50 workstations

  • •

    VOIP Traffic on a network with 100 workstations

  • •

    Video Traffic on a network with 2 workstations

  • •

    Video Traffic on a network with 10 workstations

  • •

    Video Traffic on a network with 50 workstations

  • •

    Video Traffic on a network with 100 workstations

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