pt intermediate

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2007 Cisco Systems, Inc. All rights reserved. Cisco Public

Packet Tracer

Intermediate

Session 1

Packet Tracer:

Beyond the Basics


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Session 2 2007 Cisco Systems, Inc. All rights reserved. Cisco Public

PT Intermediate SessionThis presentation will cover these topics

PT Features

Simulation Mode

PDU information

Complex PDUs

Challenge Mode

Scenarios


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Devices

PT Features


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Features

ZoomIn

ZoomReset

ZoomOutCopy

Paste

Undo

Palette

Device TemplateManagerClusterfunction

Movefunction


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Create Bend Point


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Legacy Devices (PT5.x)


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New Devices (PT5.x)

The new device:laptop-PT


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Multiuser Cloud and New Laptop

PTMPTCP/IP

The Multiuser connection (Peer0 in the picture) can connectby TCP/IP to a Multiuser connection of another PT (Instanceon a different computer)


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Device Template Manager

Router1


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Port Label Options and Other Options


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Clustering Devices


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Connect to a Device Within a Cluster


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Multiple Device Windows


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Where is the Activity Instructions Window?


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DevicesConnectingDevices

SimulationMode Basics


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What is Simulation Mode? In Simulation Mode, you have direct control over time

related to the flow of PDUs.

You can see the network run step by step, or event by

event. Nothing "runs" until you play it. When you play the

simulation, you will see graphical representations ofpackets traveling from one device to another.

You can pause the simulation, or step forward orbackward in time, investigating many types ofinformation on specific objects at specific times.


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Simulation Mode in Classroom Instruction

A picture is worth a thousand words

Many students are visual learners. Using packet iconsthat travel along graphical topologies allows these

students to see how the network operates.

Add to this graphical environment the ability to pauseand rewind


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Opening Simulation Mode

To enterSimulation Mode,click on the rightmost tab atthe bottom of the window.

The SimulationPanel will openwhere you cancontrol details of

the simulation.


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Adding a Simple PDU

To create a basic ping, click onthe Simple PDU tool.

Click on the source.

Then click on the destination.

A packet icon will beadded to your topologyand to the Event List.


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Playing the Simulation

The simulation will start when youclick eitherAuto Capture/Play orCapture/Forward.


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ARP Before PING!

If the destination

MAC address is notin the ARP table, anARP request will begenerated.


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ARP Tables Before

Use the Play Controlsto play the simulation.


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ARP Tables after

The ARP tables arepopulated.

First ICMP will fail.


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Reset and Replay

Second ICMP willbe Successful


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Event List

Eye indicates which Event isshown in topology.

Time since simulation began

Device that sentthis packet

Device that

currently hasthe packet

Click an Infobox to showdetails of thepacket at thathop.

Click an Infobox to showdetails of thepacket at thathop.


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Simulation Controls

A timer at the bottom of the EventList window shows the total time thathas elapsed since the beginning ofthe simulation.

Reset Simulation will clear theEvent List so you can start the

process over. However, devicetables are not cleared.(ARP, MAC, routing, etc.)

Constant Delay can be turned off

so that actual processing delay andpropagation delay is added to thesimulation.


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More Simulation Controls

1. You can open andclose the SimulationPanel by clicking theEvent List button.

2. Play Controlsare still available.

3. Power Cycle Devices is aglobal power cycle feature. Makesure your configs are saved!


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DevicesPDU Information


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What is PDU Information?

The PDU Information window allows you to open apacket and look inside to see how it is being processedat each layer of the OSI Model.

Its like a very simple sniffer, presenting CCNA levelinformation.


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PDU Information

You can either click on the Infobox for a specific PDU or clickon the PDU in the topologywindow to bring up the PDUInformation window.


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OSI ModelThe OSI Model shows the

de-encapsulation andencapsulation process.

Clicking on a layer will displaydetailed information aboutdecisions made at that layer.


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How can I use the OSI Model Tab? Demonstrate how switches process only to layer 2 (no layer 3

switches in PT) and routers process to layer 3.

Show what happens to a packet with no ARP table entry.

Show encapsulation and decapsulation to accommodate different

interfaces. An Ethernet frame is changed to an HDLC frame whengoing from an Ethernet interface to a Serial interface.

Show routing decisions. When a packet is at a router, the routerwill make a routing decision about the packeteither forwarding itor dropping based on routing table entries.

Show operation of an ACL.

Show operation of NAT.

Many other ways!


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Packet at Layer 2 Device

Here the packet is at alayer 2 switch.

Notice that the packetis only processed upthrough Layer 2 of theOSI Model.


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No ARP Table Entry

In this example, the routerdoes not have an ARPTable entry for the next

hop.

An ARP is generated.

The packet is dropped.


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Encapsulation

In this example, a packetcomes in on an Ethernetinterface in an Ethernet IIHeader.

The device decapsulatesthe packet for processing.

The device then

encapsulates the packetinto the appropriate frameto be sent out the Serialinterface.


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Routing

Since this device is arouter, it makes arouting decision on thepacket.

From the highlightedlayer, we see that therouter finds an entry forthis destination in the

routing table.


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NAT

In this example, the routeris configured with NAT.

A packet is processed

going from an inside to anoutside interface.

There is no entry in theNAT table for thisaddress.

The router creates anentry and processes thepacket.


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ACLs

In this example, an ACLis configured on anoutgoing port of therouter.

The packet is checkedagainst the ACL.

The packet matches a

permit statement in theACL and is permitted.

The router processesthe packet.


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Inbound/Outbound PDU Window


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Inbound/Outbound PDU Details


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Complex PDUs


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Why would I want a Complex PDU?

Creating a Complex PDU allows you to controlparameters of the packet such as:

Protocol

Source and Destination IP

Port

TTL

Sequence number

This granular control allows you to test packets againstACLs.

This also allows you to test connectivity to specificinterfaces on a device.


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Creating a Complex PDU

Click on the

Complex PDUtool to configuremore specificsfor a packet.

Choose to send onepacket or send a packet atconfigured intervals.

Configure TTL and portnumbers.

Type the destination IP or clickon the destination device to fill inthe IP address.

Select a wide varietyof protocols.

You can choose theoutgoing port.


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Editing a PDU

Click the TogglePDU List Windowbutton to get abetter view.

Double clickthe (edit) fieldto edit anexisting PDU.

Make any changes andclick Apply Changes tosave.


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Managing Your Workspace

Double-clicking on the titlebar shown here will undockthe Simulation Panel.


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Using Command Prompt in Simulation

Once undocked, the panel can bemoved so that you can see the pings inboth the Command Prompt window aswell as the Simulation Panel.


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PDU List Window

Double click Fire toadd a PDU to theEvent List.

You can change thecolor of a PDU bydouble clicking onits color box.

You can Edit orDelete a PDU by

double clicking here.


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Challenge Mode


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Challenge Mode

Students can quiz themselves on the encapsulationprocess by entering Challenge Mode.

The Challenge Me button from the OSI Model tab of

the PDU Info window starts Challenge Mode. The layer details are hidden, and the information

window is replaced by a question window that askswhat the device does to a PDU on a given layer.

Students select from a multiple-choice list. If theyanswer correctly, the details for that layer are shownand the question window advances to the next layer.

The Hint button provides hints.


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Challenge Mode

Click on Challenge Me to

answer the question, What isthe device decision in thislayer?Float over

answers formore details.

Click Hint

to get help.

Click Next Layer

to check answer.


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DevicesConnectingDevicesScenarios


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Creating a Named Scenario

You will get an emptyEvent List for each newscenario you create.

Highlight the Scenarioname to type a new name.

Click the New button tocreate a new scenario.


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Adding a Scenario Description

Click on the i to add adescription for this scenario.


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Interested in More Help?


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Reference Topologies


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Q and A


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