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Intro To Packet Tracer

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27 views

Intro To Packet Tracer

Uploaded by

Pharoah
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPTX, PDF, TXT or read online on Scribd
You are on page 1/ 21

Introduction to Packet

Tracer
Packet Tracer – Creating a New Topology

 Packet Tracer is a protocol simulator developed by


Dennis Frezzo and his team at Cisco System
 Packet Tracer (PT) is a powerful and dynamic tool
that displays the various protocols used in
networking, in either Real Time or Simulation modes.
 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.
Step 1: Start Packet Tracer
Choosing Devices and Connections
Building the Topology – Adding Hosts
Single click on the End Devices.

Single click on the Generic host.

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
Add three more hosts.
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.

Add the hub by moving the plus sign “+” below PC0 and PC1 and click once.

Connect PC0 to Hub0 by first choosing Connections.

Click once on the Copper Straight-through


cable.
Perform the following steps to connect PC0 to Hub0:
1. Click once on PC0
2. Choose Fast Ethernet
3. Drag the cursor to Hub0
4. Click once on Hub0 and choose Port 0
5. Notice the green link lights on both the PC0 Ethernet NIC and the Hub0 Port 0
showing that the link is active

Repeat the steps above for PC1 connecting it to Port 1 on Hub0. (The actual hub port
you choose does not matter.)
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.

Connect PC2 to Hub0 by first choosing Connections.


Click once on the Copper Straight-through cable
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.

Repeat the steps above for PC3 connecting it to Port 3 on Switch0 on port
FastEtherent0/2. (The actual switch port you choose does not matter.)
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 and click on Settings. 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 and the DNS Server IP Address. We will discuss this later, but this would be the IP
address of the local router. If you want, you can enter the Gateway IP Address 172.16.1.1 and
DNS Server IP Address 172.16.1.100, although it will not be used in this lab.
Click on Interface and then FastEthernet. add the IP Address to 172.16.1.10. Click
once in the Subnet Mask field to enter the default Subnet Mask. You can leave this at
255.255.0.0.
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 Ethernet NIC on the host will choose Half
Duplex. (Full Duplex is a much more efficient option.)

The information is automatically saved when entered.

To close this dialog box, click the “X” in the upper right.
Repeat these steps for the other hosts. Use the information below for IP Addresses and Subnet Masks.

Host IP Address Subnet Mask


PC0 172.16.1.10 255.255.0.0
PC1 172.16.1.11 255.255.0.0
PC2 172.16.1.12 255.255.0.0
PC3 172.16.1.13 255.255.0.0

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.
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 over Hub0 and click once.

Select Port 5 (actual port does not matter).


Move the Connections cursor to Switch0.

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.
Verifying Connectivity in Realtime Mode

Be sure you are in Realtime mode

Select the Add Simple PDU tool used to ping devices..

Click once on PC0, then once on PC3.

The PDU Last Status should show as Successful.


Resetting the Network

At this point we will want to reset the network, Whenever you want to reset the
network and begin the simulation again, perform the following tasks:

Click Delete in the PDU area.


Verifying Connectivity in Simulation Mode
Be sure you are in Simulation mode.

Deselect all filters (All/None) and select only ICMP.


Select the Add Simple PDU tool used to ping devices..

Click once on PC0, then once on PC3.

Continue clicking Capture/Forward button until the ICMP ping is completed. You should
see the ICMP messages move between the hosts, hub and switch. The PDU Last Status
should show as Successful. Click on Clear Event List if you do not want to look at the
events or click Preview Previous Events if you do. For this exercise it does not matter.

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