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Introduction to Packet Tracer

by: Robert Notetaker

Introduction to Packet Tracer CS619_683_2

Robert Notetaker

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About this Document

The purpose of this lesson is to become familiar with the Packet Tracer interface. Learn how to use existing topologies and build your own.
Computation, Programs, and Programming
Class Notes
Computer Science
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This 13 page Class Notes was uploaded by Robert Notetaker on Friday October 14, 2016. The Class Notes belongs to CS619_683_2 at Armstrong Atlantic State University taught by Rizwan in Fall 2014. Since its upload, it has received 10 views. For similar materials see Computation, Programs, and Programming in Computer Science and Engineering at Armstrong Atlantic State University.

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Date Created: 10/14/16
Practical - Introduction to Packet Tracer What is Packet Tracer? Packet Tracer is a protocol simulator developed by Dennis Frezzo and his team at Cisco Systems. Packet Tracer (PT) is a powerful and dynamic tool that displays the various protocols used in networking, in either Real Time or Simulation mode. This includes layer 2 protocols such as Ethernet and PPP, layer 3 protocols such as IP, ICMP, and ARP, and layer 4 protocols such as TCP and UDP. Routing protocols can also be traced. Purpose: The purpose of this lab is to become familiar with the Packet Tracer interface. Learn how to use existing topologies and build your own. Requisite knowledge: This lab assumes some understanding of the Ethernet protocol. At this point we have not discussed other protocols, but will use Packet Tracer in later labs to discuss those as well. Version: This lab is based on Packet Tracer 4.0 Beta, Test1. Introduction to the Packet Tracer Interface using a Hub Topology Step 1: Start Packet Tracer and Entering Simulation Mode 1 Step 2: Choosing Devices and Connections We will begin building our network topology by selecting devices and the media in which to connect them. Several types of devices and network connections can be used. For this lab we will keep it simple by using End Devices, Switches, Hubs, and Connections. Single click on each group of devices and connections to display the various choices. Step 3: Building the Topology – Adding Hosts Single click on the End Devices. 2 Move the cursor into topology area. You will notice it turns into a plus “+” sign. Single click in the topology area and it copies the device. 3 Step 4: Building the Topology – Connecting the Hosts to Hubs and Switches Adding a Hub Select a hub, by clicking once on Hubs and once on a Generic hub. Perform the following steps to connect PC0 to Hub0: 1. Click once on PC0 2. Choose FastEthernet 3. Drag the cursor to Hub0 4. Click once on Hub0 and choose Port 0 4 5. Notice the green link lights on both the PC0 Ethernet NIC and the Hub0 Port 0 showing that the link is active. Adding a Switch Select a switch, by clicking once on Switches and once on a 2950-24 switch. Add the switch by moving the plus sign “+” below PC2 and PC3 and click once. 5 Connect PC2 to Hub0 by first choosing Connections. Click once on the Copper Straight-through cable. 6 Perform the following steps to connect PC2 to Switch0: 1. Click once on PC2 2. Choose FastEthernet 3. Drag the cursor to Switch0 4. Click once on Switch0 and choose FastEthernet0/1 5. Notice the green link lights on PC2 Ethernet NIC and amber light Switch0 FastEthernet0/1 port. The switch port is temporarily not forwarding frames, while it goes through the stages for the Spanning Tree Protocol (STP) process. 6. After a about 30 seconds the amber light will change to green indicating that the port has entered the forwarding stage. Frames can now forwarded out the switch port. 7 Step 5: Configuring IP Addresses and Subnet Masks on the Hosts Before we can communicate between the hosts we need to configure IP Addresses and Subnet Masks on the devices. Click once on PC0. Choose the Config tab. It is here that you can change the name of PC0. It is also here where you would enter a Gateway IP Address, also known as the default gateway. We will discuss this later, but this would be the IP address of the local router. If you want, you can enter the IP Address, although it will not be used in this lab. Click on FastEthernet. Although we have not yet discussed IP Addresses, add the IP Address to Click once in the Subnet Mask field to 8 enter the default Subnet Mask. You can leave this at We will discuss this later. Also, notice this is where you can change the Bandwidth (speed) and Duplex of the Ethernet NIC (Network Interface Card). The default is Auto (autonegotiation), which means the NIC will negotiate with the hub or switch. The bandwidth and/or duplex can be manually set by removing the check from the Auto box and choosing the specific option. Bandwidth - Auto If the host is connected to a hub or switch port which can do 100 Mbps, then the Ethernet NIC on the host will choose 100 Mbps (Fast Ethernet). Otherwise, if the hub or switch port can only do 10 Mbps, then the Ethernet NIC on the host will choose 10 Mbps (Ethernet). Duplex - Auto Hub: If the host is connected to a hub, then the Ethernet NIC on the host will choose Half Duplex. Switch: If the host is connected to a switch, and the switch port is configured as Full Duplex (or Autonegotiation), then the Ethernet NIC on the host will choose Full Duplex. If the switch port is configured as Half Duplex, then the 9 Ethernet NIC on the host will choose Half Duplex. (Full Duplex is a much more efficient option.) The information is automatically saved when entered. Repeat these steps for the other hosts. Use the information below for IP Addresses and Subnet Masks. Host IP Address Subnet Mask PC0 PC1 PC2 PC3 Verify the information To verify the information that you entered, move the Select tool (arrow) over each host. Deleting a Device or Link To delete a device or link, choose the Delete tool and click on the item you wish to delete. 10 Step 6: Connecting Hub0 to Switch0 To connect like-devices, like a Hub and a Switch, we will use a Cross-over cable. Click once the Cross-over Cable from the Connections options. Move the Connections cursor to Switch0. 11 Click once on Switch0 and choose FastEthernet0/4 (actual port does not matter). The link light for switch port FastEthernet0/4 will begin as amber and eventually change to green as the Spanning Tree Protocol transitions the port to forwarding. 12 13


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