Lab 4-2

Packet Tracer - Single Router Lab

Objective: Review the role of routers in networking and configure a simple routed network

Goals:

• Gain more experience with switching and routing technology and Packet Tracer.
• Extend the switched network from the previous lab (3-4) to include 2 switches, and a router.

Steps

• Use one of the following Packet Tracer files to start:
• • For Packet Tracer 7.2.1: Use this file Download this file.
• • For Packet Tracer 7.3: Use this file Download this file.
• Check the network addresses on the PC's from 10.10.100.X and make sure that 10.10.10.1 is set as the gateway.
• • Click on a PC - Desktop - IP Configuration to review/edit
• Add another Cisco 2950-24 switch
• Add a new generic PC (PC4) and connect to the new switch on port Fa0/4
• • Assign an ip address of 10.10.10.104 to PC4 and the same mask and gateway as the other PC's
• Connect the 2 Switches with a crossover cable (dotted line-cable in PT) using port Fa0/1 on both switches
• Ensure that all PC's can successfully ping one another before moving on.

Should look like:

Creating a Second Network

• Next step is create a separate network using a different address (20.20.20.0/24)
• Change the IP configuration of PC4 with the following info:
• • IP: 20.20.20.104
• • with a gateway of 20.20.20.1 and netmask 255.255.255.0

Should look like:

• Can it ping the machines on the 10.10.10.0 network?
• • It should not work
• • This is because switches operate using MAC addresses
• • In order to communicate between 2 networks, a router is necessary. The router operates at Layer 3 of the OSI model and uses the Internet Protocol to send packets where they need to go.
• Insert a 1841 router between the 2 switches.
• • These routers have 2 Ethernet ports and you are going to use them to connect to the 2 networks.
• Connect a straight-thru Ethernet cable between the Switch on the 10.10.10.0/24 network and FastEthernet port 0/0 on the router
• Connect a straight-thru Ethernet cable between the Switch on the 20.20.20.0/24 network and FastEthernet port 0/1 on the router
• Remove the crossover cable between the 2 switches

• Click on the Router - Config Tab
• • on the Fastethenet 0/0 configuration, enter the address : 10.10.10.1 and netmask 255.255.255.0
• This interface will act as the Gateway for the 10.10.10.0/24 network - so is assigned the Gateway IP of 10.10.10.1
• • Click the "on" box in the upper right to enable the interface
• Do the same for the FastEthernet 0/1 config, using 20.20.20.1
• • the Gateway address for the 20.20.20.0/24 network
• • Make sure to turn the interface "on"
• • Watch the equivalent CLI (Command Line Interface) window at the bottom of the screen as the configuration takes place.
• When all the lights go green, you should be able to ping between the client nodes on the 2 networks.
• Open the CLI window on the Router
• • You need to be at the router# prompt
• • *If the prompt is router(conf)# type exit or if at router(conf-if)# type exit twice until you return to the router# prompt
• • Type "show ip route" and it will print the routing table.
• • The bottom two rows with the C in front represent the current routes.
• • The C indicates that the networks are Directly Connected to the router
• SUBMIT: A screenshot of the "show ip route" command with the current routes.