Introduction Why Use OPNET Modeler Computer Science Essay

Introduction Why Use OPNET modeler information mental subprograming system Science EssayOPNET modeler is a very good instrument for engagement designing and simulation. OPNET fashion modeler was readed beca make use of most of the wire and radio network components argon available in the OPNET 15.0 modeler. In this version a design of antithetic models can be created to simulate, analyze and compargon their results.This chapter explains how the different wired and radio set network has been designed and simulated in OPNET Modeler. In this control different scenario for Ethernet, digital proofreader line, Wi-Fi, and WiMAX in two different projects has been created in OPNET Modeler 15.0 . in that location is as well as a comparison between the wired and wireless networks. The Ethernet network is compared with the Wi-Fi network and the digital subscriber line network is compared with the WiMAX network.Over catch up with of OPNET ModelerOPNET stands for Optimized inte rlocking Engineering Tool. The OPNET Modeler is a very powerful tool for the network modeling and simulation. The consumption of the OPNET Modeler is to optimize cost, efficiency, performance, viability and scalability characteristics of the network. In addition OPNET Modeler has a vast library of nodes(fixed, mobile or satellite), tie in(simplex, duplex, wired or wireless), and subnets, which are apply to design and simulate network manikin, protocols, merchandise and end user industrys. OPNET Modeler has three hierarchical levels or editors. These are plan EditorProject editor is also known as network editor. The project editor is the key staging area for modeling a network simulation. In the project editor a network can be created by victimization the nodes, link, and subnets from the standard library, then select statistics, run the simulation and view the results of the network. turn inspissation EditorTo built models of nodes the node editor is used. Node editor specifi es the internal structure of the network node. The node includes work put ups, satellite terminals, switches, and upstage sensors. The OPNET node has a modular structure. The packets and status information are exchange between modules which are connected via packet streams or statistic wires. Every module performs specific function, such as generating packets, processing packets, transmitting and receiving packets or queuing packets.FIGUREProcess EditorThe process editor is used to design process models, which controls the basic functionality of node models generated in the node editor. The process models are represented by Finite State Machines (FSMs). The FSMs are generated with icons, which show states and lines which shows transitions between states. The process models are expressed in C or C++ language. courseIn this chapter four different scenarios are discussed. These areScenario1 Ethernet meshing ModelIn this scenario a young wired network for Ethernet is created in OPNE T Modeler as shown in encipher. This scenario is created for campus network.In this scenario seven workstations are connected to the switch. With the assistant of a router the switch is connected to the horde. The switch is connected to the router which is connected to the server. Ethernet links are used to connect all these nodes with each different. The server provides different industrys used for the workstations. For this network model we also need to define the applications and visibilitys by adding a node for the application and profile. The workstations are associated with the profiles in order to use different applications.Hsnapshots 1ETHERNET.bmp anatomy Ethernet Network ModelThe nodes used in this scenario isNode Name translation coveringsvisibilitysServerRouter flickWorkstationHow to configure NodesThe grade of each node is as followApplication manakinThe application phase is the most important node in the network design. By oversight the application conformity has a maximum of sixteen services, which are supported by the OPNET Modeler. These are http, ftp, e-mail, print etc. In this scenario the slackness services are selected as shown in the figureTo configure the application node right click on it, select Edit Attributes a dialogue box will open. Change the describe field lever to application. Expand the Application Definitions row, select the default option while go forth opposite setting at default as shown in the figure.HSNAPSHOT22)ETHERNET APPLICATIN CONFIG.bmpFigure Ethernet Application ConfigurationProfile ConfigurationThe profile anatomy allows us to define a user or a separate of user to the application services supported by the network. For this scenario one profile is defined namely shahid.The profile node can be set up by expanding the profile configuration row. Define the profile namely shahid also define the applications and change the operating room mode to simultaneous while remaining the other setting at defaul t as shown in figureTo configure the profile configuration right click on it, select Edit Attributes a dialogue box will appear. Change the name field value to profiles. Expand the profile configuration row, select edit. then define the profile namely shahid also define the applications and change the operation mode to simultaneous while left the other setting at default as shown in figure.HSNAPSHOT22)ETHERNET PROFILE CONFIG2.bmpFigure Ethernet Profile ConfigurationServer ConfigurationThe server can generate the applications traffic such as http, ftp, e-mail, print etc. This traffic can be sent to the workstations with the help of router and switch which are connected by Ethernet links. In the server configuration, three applications supported services were defined namely http, ftp, and e-mail while all other settings are left at default as shown in figure.HSNAPSHOT22)ETHERNET SERVER.bmpFigure Ethernet Server ConfigurationWorkstation ConfigurationThe workstation can also generate the applications traffic, which can be sent to the server through and through the network to the server. The workstation can be configured by selecting the Application Supported Profiles namely shahid while left all the other parameters at default as shown in the figure.HSNAPSHOT22)ETHERNET WKSTN CONFIG.bmpFigure Ethernet Workstation ConfigurationRouter and displacementThe functions of both the router and switch are almost the same. Both are furtherance the traffic to the end nodes. The router and switch are connected to each other through Ethernet link.Scenario2 Wlocal area network Network ModelIn scenario 2 a wireless network model for wireless fidelity is created in OPNET Modeler as shown in figure. This scenario is also created for the campus network.This scenario is similar to scenario1 with slight changes. In scenario2 the switch of scenario 1 is replaced with the wireless accession full heading (AP) and also the workstations are replaced with the wireless LAN workstatio ns. The main function of the wireless access run is to transmit and put one across the wireless signals. The access indicate is connected to the router which is then connected to the server through Ethernet link as shown in figure.CUsersshahid aliDesktopUntitlrgregreeddfgdfg.pngFigure WLAN Network ModelThe nodes used in scenario2 isNode NameDescriptionApplicationsProfilesServerRouterWireless Access PointWireless LAN WorkstationsThe configuration of all the nodes except the wireless access point (AP) and wireless workstations are the same which are discussed in scenario1.The configuration of the wireless access point (AP) and the wireless workstations are as follow.Wireless access point (AP) configurationThe wireless access point (AP) transmits and commences the wireless signals. The wireless access point can be configured by expanding the wireless LAN parameters. The access point functionality should be enabled so that this node can transmit the wireless signals. The BSS Identif ier value is set to 0. If there is another wireless access point (AP) in the network then its BSS Identifier value must be different. The other setting is left at default as shown in figure.HSNAPSHOT22)WLAN AP CONFIG.bmpFigure WLAN Wireless Access Point (AP) ConfigurationWorkstation configurationThe workstation configuration is the same as the workstation configuration in scenario1. But in this scenario the BSS identifier value for the workstations is also defined. The BSS Identifier value is set to 0. This value must be the same as the wireless access point BSS Identifier value. The access point functionality is disabled for the workstations. The remaining settings are left at default as shown in figure.HSNAPSHOT22)WLAN WKSTN APLICATION AND WIRELASS CONFIG.bmpFigure WLAN Workstations ConfigurationScenario3 DSL Network ModelIn this scenario a wired network model is created for the DSL using the OPNET Modeler. In this scenario four workstations are connected to the switch through the Ethernet links. The switch is connected to DSL modem. The DSL modem is connected to the DSLAM via the DSL links. The fictitious character of DSL used for this scenario is Asymmetric DSL (ADSL). The ADSL has a high downriver data rate than the upstream data rate. The function of the DSLAM is to linked several(prenominal) users to the high speed backbone network. The DSL modem is used to send and receive signals. The DSL modem has internal signal splitter that carries voice signal on the low frequencies and carries data signal above that frequencies. With the help of IP cloud the DSLAM is connected to the server via the PPP link. The figure shows the DSL network model.CUsersshahid aliDesktopSHANPSHOT33DSL.bmpFigure DSL Network ModelThe nodes and links used in scenario3 areNode/ necktie NameDescriptionApplicationsProfilesServerRouterSwitchWorkstationIP CloudDSLAMDSL modemPPP concernDSL LinkEthernet LinkThe configuration of each node and applications taken for this scenario is the same as discussed in scenario1 and scenario2. For scenario3 the profile name is different, here the profile name is SHAH.Scenario4 WiMAX Network ModelIn scenario4 a wireless network model for the WiMAX is created using OPNET Modeler. This scenario is the same to scenario3 but there is a slight changes. A new node is added for the WiMAX configuration. Without this node the WiMAX network will not work. In this scenario the DSL modem is replaced with the WiMAX basestation, the switch is replaced with the subscriber station and the workstations are replaced with the wireless workstations. The WiMAX basestation will transmits the wireless signal over a long distance. The subscriber station which is set at the costumer site receives this signal, which is then sent to the wireless workstations. The subscriber station and the WiMAX basestation communicate through air interface-. The WiMAX basestation is communicating to the server through the ip cloud and router via PPP link. The figure sh ows WiMAX network model.CUsersshahid aliDesktopSHANPSHOT33WIMAX.bmpFigure WiMAX Network ModelThe nodes and links used for scenario4 areNode/Link NameDescriptionApplicationsProfilesWimax configServerRouterIp cloudWiMAX basestationSubscriber stationWorkstationLink