Lab 4-1: ARP Packet Tracer Lab

Goals:

• To become familiar with Cisco's network emulator tool - Packet Tracer

• To gain some more exposure to Address Resolution Protocol and Ethernet and develop a deeper understanding of the relationship between these two protocols.

Overview:

In this lab, you will use Packet Tracer to simulate a small network consisting of 4 computers and a switch. You will examine the address table of the switch and ARP tables of the computers. Then you will initiate some communication between the machines and watch the frames. Analysis of the frame contents will help understand how ARP and Ethernet work

Steps

1. Start Packet Tracer and sign in with your Cisco Academy Credentials

2. Use the Devices Section in the lower left to build a simple network diagram using 4 generic computers and a switch

   • Select the Device Category, locate the device you want, and click-drag into the workspace

   • Do not connect the computers to the switch yet. (will embed graphic)

   • 
3. Hold the mouse over each computer to see the configuration. Gather information about the devices and answer the following questions

   • SUBMIT: (1 Point)

   • What is the MAC address of the ethernet adapter on PC0?

     • 1. 000C.CF46.5346

   • Is there an IP address?

     • 1. No it is not set at this point.

   • Hold the mouse over the switch to see the configuration.

   • Are there IP addresses assigned?

     • 1. The ip addresses for each ethernet channel are not configured.

4. Click on PC0 - Desktop Tab

   • Open the Command Prompt

   • Type arp –a to see the arp table and review to see if there are any entries

     • 1. No entries found

5. Assign IP addresses to the computers (use 4 addresses on the same network : 10.10.10.X) What does it mean for PCs to be "on the same network"?

   • To be on the same network typically means the machines are sharing a default gateway.

   • Select the computer, then Config tab, then FastEthernet0 ( Fa0)

   • Configure the IP addresses as follows. Use a netmask of 255.255.255.0

PC	IP Address
0	10.10.10.100
1	10.10.10.101
2	10.10.10.102
3	10.10.10.103

• • Review the ARP table entries of the PC's again

1. Examine the address table of the switch.

   • Click on the switch and the select CLI. This is the Command Line Interface. You need to get to the root CLI prompt which looks like Switch#

     • If the prompt looks like: Switch>, then type enable to enter admin mode

     • If the prompt looks like Switch (config)# type exit to get back to the basic mode for admin

   • Then type show mac-address-table

• • Review the table format for Mac Address and Port

1. Use Ethernet cables to connect the computers to the switch.

   • The "Lightening Bolt" in lower left will allow you to add connections between devices

   • Use the straight black cable (ethernet straight-through) to connect PC0 to Fa0/10 on the switch, PC1 to Fa0/11...

   • 
2. On PC0, open the Desktop and select Command Prompt.

3. From the command prompt on PC0, ping PC3 using it’s IP address.

4. SUBMIT (2 Points) Screenshot showing successful ping between PC0 and PC3

1. Verify that all of the PC's can ping one another. If not, troubleshoot and fix!

2. Now, inspect the configuration of the Switch using the steps outlined above in step 6 for the CLI and show mac-address-table.

   • SUBMIT (3 Points): Complete the following table

SUBMIT: Screenshot of Packet Tracer showing all 4 PC's connected to switch (1 Points)

Make Sure to Save Your Packet Tracer File: We will be using again next week!