Packet Tracer - Using Traceroute to Discover
the Network
Please click here to download topology 4.1.1.8 Packet Tracer - Using Traceroute to Discover the Network instructions
Topology
4.1.1.8 Packet Tracer - Using Traceroute to Discover the Network instructions |
Scenario
The company you work for has acquired a
new branch location. You asked for a topology map of the new location, but
apparently one does not exist. However, you have username and password
information for the new branch’s networking devices and you know the web
address for the new branch’s server. Therefore, you will verify connectivity
and use the tracert command to
determine the path to the location. You will connect to the edge router of the
new location to determine the devices and networks attached. As a part of this
process, you will use various show commands to gather the necessary information
to finish documenting the IP addressing scheme and create a diagram of the
topology.
Note: The user EXEC password is cisco.
The privileged EXEC password is class.
Trace and Document a Remote Location
Note:
As you complete the following steps, copy command
output into a text file for easy reference and record the missing information
in the Addressing Scheme Documentation table.
Refer to the Hints page for a review of the commands
used. In Packet Tracer, click the right arrow (>) on the bottom right side
of the instruction window. If you have a printed version of the instructions,
the Hints page is the last page.
a.
Click Sales and the Desktop
tab > Command Prompt. Use the ipconfig command to check the IP
address configuration for Sales.
b.
The new server web address is b2server.pt.pka. Enter the following nslookup command to discover the IP
address for b2server:
PC> nslookup b2server.pt.pka
What address did the command return for b2server? ______________________
c.
Enter the tracert command to determine the path from Sales to b2server.pt.pka.
PC> tracert b2server.pt.pka
d.
Telnet to the first IP address
in the tracert output and log in.
PC> telnet 172.16.0.1
e.
You are connected to the
R4 router. Issue the traceroute command on the router using
the address for b2server determined in step b. What is different about the traceroute command on the router
compared to tracert on the PC?
____________________________________________________________________________________
____________________________________________________________________________________
What is the significance of R4
to Sales?
____________________________________________________________________________________
f.
Use the show ip interface brief command to display the status of the
interfaces on R4. Based on the
output of the command, which interface is used to reach the next device in the
list output from the tracert command?
____________________________________________________________________________________
Hint: Use show running-config to view the subnet mask values for the
interfaces.
g.
Telnet to the second IP address
in the tracert list and log in. You
can use the number in the far left column of the tracert output to track where you are in the list. What is the name
of the device to which you are connected? ______________________
h.
Issue the show ip route command and study the
output. Referring to the list of codes at the beginning of the output, what are
the different types of routes displayed in the routing table?
____________________________________________________________________________________
i.
Based on the show ip route command output, which
interface is the exit interface for the next IP address listed in your original
tracert output? ______________________
j.
Telnet to the third IP
address in the tracert list and log in.
What is the hostname of the current device?
____________________________________________________________________________________
Issue the show ip route connected command. What networks are connected
directly to this router?
____________________________________________________________________________________
Refer to the Addressing
Scheme Documentation table. Which interfaces connect the devices between
trace route 2 and trace route 3?
____________________________________________________________________________________
k.
Telnet to the fourth IP address
in the tracert list and log in. What
is the name of the device?
____________________________________________________________________________________
l.
Issue a command to determine to
what interface b2server.pt.pka is
connected
____________________________________________________________________________________
m.
If you have used the Addressing Scheme Documentation table
as you completed the previous steps, the table should now be complete. If not,
finish the table now.
n.
With a complete documentation
of the addressing scheme and knowledge of the path from Sales to branch2.pt.pka,
you should be able to now draw the new branch location in the Topology Documentation space below.
Addressing Scheme Documentation
Trace Route ID
|
Device
|
Interface
|
Address
|
Subnet Mask
|
-
|
Sales
|
NIC
|
172.16.0.x (DHCP)
|
255.255.255.0
|
1
|
|
|
|
|
|
|
|
||
S0/0/1.1
|
64.100.200.1
|
255.255.255.252
|
||
2
|
|
|
|
|
G0/1
|
64.104.223.1
|
255.255.255.252
|
||
S0/0/0
|
64.100.100.2
|
|
||
|
|
|
||
3
|
|
|
|
|
G0/2
|
|
255.255.255.0
|
||
F0/1
|
128.107.46.1
|
|
||
|
|
|
||
4
|
|
G0/0
|
|
|
|
|
|
||
5
|
b2server.pt.pka
|
NIC
|
128.107.64.254
|
255.255.255.0
|
Topology Documentation
Use the space below to draw the topology
for the new branch location.
Suggested Scoring Rubric
Activity Section
|
Possible Points
|
Earned Points
|
Questions
(2 points each)
|
20
|
|
Addressing
Scheme Documentation
|
60
|
|
Topology
Documentation
|
20
|
|
Total Point
|
100
|
|
Hints - Command Summary Reference
DOS Commands
ipconfig - The output of the default command contains the IP address,
network mask and gateway for all physical and virtual network adapters.
ipconfig
/all - This option displays the same IP addressing
information for each adapter as the default option. Additionally, it displays
DNS and WINS settings for each adapter.
Nslookup - Displays information that you can use to diagnose Domain Name
System (DNS) infrastructure.
Syntax:
nslookup
dns.name
Tracert - Determines the path taken to a destination by sending Internet
Control Message Protocol (ICMP) Echo Request messages to the destination with
incrementally increasing Time to Live (TTL) field values. The path displayed is
the list of near-side router interfaces of the routers in the path between a
source host and a destination. The near-side interface is the interface of the
router that is closest to the sending host in the path. Used without
parameters, tracert displays help.
Syntax:
tracert
[TargetName/IP Address]
IOS Commands
show
ip interface – Displays the IP interface status and
configuration
show
ip interface brief – Displays a brief summary of IP
status and configuration
show
ip route – Displays the full IP routing table
show
ip route connected – Displays a list of active
directly connected networks
show
running-config – Displays the current operating
configuration
traceroute – Trace route to destination
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