PT4.1 Intermediate presentation

PT4.1 Intermediate presentation
Packet Tracer:
Beyond the Basics
Packet Tracer
Intermediate
Session
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1
PT Intermediate Session
This 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
Device Template
CopyZoomIn UndoZoomOut
Manager
Cluster
Move
function function
Paste
ZoomReset
Palette
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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
PTMP
TCP/IP
• The Multiuser connection (Peer0 in the picture) can connect
by TCP/IP to a Multiuser connection of another PT (Instance
on 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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Simulation
Connecting
Devices
Mode
Basics
Devices
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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 of
packets traveling from one device to another.
 You can pause the simulation, or step forward or
backward in time, investigating many types of
information 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” icons
that travel along graphical topologies allows these
students to “see” how the network operates.
 Add to this graphical environment the ability to pause
and rewind…
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Opening Simulation Mode
The Simulation
Panel will open
where you can
control details of
the simulation.
To enter Simulation Mode,
click on the rightmost tab at
the bottom of the window.
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Adding a Simple PDU
To create a basic ping, click on
the Simple PDU tool.
Click on the source.
A packet icon will be
added to your topology
and to the Event List.
Then click on the destination.
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Playing the Simulation
The simulation will start when you
click either Auto Capture/Play or
Capture/Forward.
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ARP Before PING!
If the destination
MAC address is not
in the ARP table, an
ARP request will be
generated.
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ARP Tables Before…
Use the Play Controls
to play the simulation.
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ARP Tables after…
The ARP tables are
populated.
First ICMP will fail.
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Reset and Replay
Second ICMP will
be Successful
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Event List
Time since simulation began
Device that sent
this packet
Device that
currently has
the packet
Eye indicates which Event is
shown in topology.
Click an Info
box to show
details of the
packet at that
hop.
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Click an Info
box to show
details of the
packet at that
hop.
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Simulation Controls
A timer at the bottom of the Event
List window shows the total time that
has elapsed since the beginning of
the simulation.
Reset Simulation will clear the
Event List so you can start the
process over. However, device
tables are not cleared.
(ARP, MAC, routing, etc.)
Constant Delay can be turned off
so that actual processing delay and
propagation delay is added to the
simulation.
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More Simulation Controls
3. Power Cycle Devices is a
global power cycle feature. Make
sure your configs are saved!
2. Play Controls
are still available.
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1. You can open and
close the Simulation
Panel by clicking the
“Event List” button.
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Devices
PDU Information
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What is PDU Information?
 The PDU Information window allows you to “open” a
packet and look inside to see how it is being processed
at each layer of the OSI Model.
 It’s like a very simple sniffer, presenting CCNA level
information.
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PDU Information
You can either click on the Info
box for a specific PDU or click
on the PDU in the topology
window to bring up the PDU
Information window.
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OSI Model
The OSI Model shows the
de-encapsulation and
encapsulation process.
Clicking on a layer will display
detailed information about
decisions 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 when
going from an Ethernet interface to a Serial interface.
 Show routing decisions. When a packet is at a router, the router
will make a routing decision about the packet…either forwarding it
or 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 a
layer 2 switch.
 Notice that the packet
is only processed up
through Layer 2 of the
OSI Model.
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No ARP Table Entry
 In this example, the router
does not have an ARP
Table entry for the next
hop.
 An ARP is generated.
 The packet is dropped.
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Encapsulation
 In this example, a packet
comes in on an Ethernet
interface in an Ethernet II
Header.
 The device decapsulates
the packet for processing.
 The device then
encapsulates the packet
into the appropriate frame
to be sent out the Serial
interface.
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Routing
 Since this device is a
router, it makes a
routing decision on the
packet.
 From the highlighted
layer, we see that the
router finds an entry for
this destination in the
routing table.
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NAT
 In this example, the router
is configured with NAT.
 A packet is processed
going from an inside to an
outside interface.
 There is no entry in the
NAT table for this
address.
 The router creates an
entry and processes the
packet.
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ACLs
 In this example, an ACL
is configured on an
outgoing port of the
router.
 The packet is checked
against the ACL.
 The packet matches a
“permit” statement in the
ACL and is permitted.
 The router processes
the 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 control
parameters of the packet such as:
Protocol
Source and Destination IP
Port
TTL
Sequence number
 This granular control allows you to test packets against
ACLs.
 This also allows you to test connectivity to specific
interfaces on a device.
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Creating a Complex PDU
You can choose the
outgoing port.
Select a wide variety
of protocols.
Type the destination IP or click
on the destination device to fill in
the IP address.
Click on the
Complex PDU
tool to configure
more specifics
for a packet.
Configure TTL and port
numbers.
Choose to send one
packet or send a packet at
configured intervals.
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Editing a PDU
Double click
the (edit) field
to edit an
existing PDU.
Make any changes and
click Apply Changes to
save.
Click the Toggle
PDU List Window
button to get a
better view.
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Managing Your Workspace
Double-clicking on the title
bar shown here will undock
the Simulation Panel.
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Using Command Prompt in Simulation
Once undocked, the panel can be
moved so that you can see the pings in
both the Command Prompt window as
well as the Simulation Panel.
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PDU List Window
Double click Fire to
add a PDU to the
Event List.
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You can change the
color of a PDU by
double clicking on
its color box.
You can Edit or
Delete a PDU by
double clicking here.
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Challenge Mode
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Challenge Mode
 Students can quiz themselves on the encapsulation
process 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 asks
what the device does to a PDU on a given layer.
 Students select from a multiple-choice list. If they
answer correctly, the details for that layer are shown
and the question window advances to the next layer.
 The Hint button provides hints.
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Challenge Mode
Float over
answers for
more details.
Click on Challenge Me to
answer the question, “What is
the device decision in this
layer?”
Click Hint
to get help.
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Click Next Layer
to check answer.
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Connecting
Devices
Scenarios
Devices
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Creating a Named Scenario
You will get an empty
Event List for each new
scenario you create.
Highlight the Scenario
name to type a new name.
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Click the New button to
create a new scenario.
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Adding a Scenario Description
Click on the i to add a
description 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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