CCNA3:LAN

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26 Οκτ 2013 (πριν από 3 χρόνια και 9 μήνες)

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Tecnologies de Xarxes D’Ordinadors

(CCNA)










CCNA

3
:

LAN

SWITCHING AND
W
IRELESS

C
ASE
S
TUDY

CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

2


Overview and Objectives

This case study allows students to complete a network design, implementation, and
troubleshooting project u
sing the skills gained in CCNA 3
. Students will use the skills that

have
already been developed to use, make and connect the proper cabling to the appropriate
devices.

It is crucial to read and understand the scenarios to make sure that all requirements are
fulfilled. Each scenario guides the student through the proper st
eps to ensure that the project
is completed properly.

This case study requires the student to accomplish the following tasks:


Set up the physical layout of the network using the diagram and accompanying
narrative


Correctly configure the routers with a basi
c router configuration


Correctly configure the routing features that the design requirements
describe


Correctly configure the switches with a basic switch configuration



Correctly configure the switching features that the design requirements describe


Troub
leshoot and test the

conne
ctivity between all devices


Provide detailed documentation in a prescribed form, as listed in the deliverables
section

CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

3


Scenario and Phase 1: Project Description




















LaSalle Telecom is a company that
has several pe
ople responsible for designing and
implementing

the switched infrastructure of the university Campus
. Many technicians
are
involved in the
upgrading

p
rocess
.

A technician is
given the task to complete this

design and i
mplementation
knowing that the

final network has the topology

of the exhibit
.

After
deploying the solution, it

i
s important that any documentation explaining the purpose,
design, implemen
tation or troubleshooting is recorded for further upgrade.



CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

4


Below are the necessary information related to the implementation of the topology.

Addressing Table

Device

Interface

IP Address

Subnet
Mask

Default Gateway

R1

F0/0

N/A

N/A

N/A

F0/0.10

172.16.10.1

255.255.255.0

N/A

F0/0.20

172.16.20.1

255.255.255.0

N/A

F0/0.99

172.16.99.1

255.255.255.0

N/A

S0/0

209.169.100.1

255.255.255.252

N/A

R2

S0/0

209.169.100.5

255.255.255.252

N/A

S0/1

209.169.100.2

255.255.255.
252

N/A

Lo0

200.200.200.1

255.255.255.
0

N/A

R3

F0/0

N/A

N/A

N/A

F0/0.10

172.16.10.3

255.255.255.0

N/A

F0/0.20

172.16.20.3

255.255.255.0

N/A

F0/0.99

172.16.99.3

255.255.255.0

N/A

S0/1

209.169.100.6

255.255.255.252

N/A

SW1

VLAN 99

172.16.99.11

255.255.255.0

172.16.99.1

SW2

VLAN 99

172.16.99.12

255.255.255.0

172.16.99.1

SW3

VLAN 99

172.16.99.13

255.255.255.0

172.16.99.1

PC1

NIC

172.16.10.10

255.255.255.0

172.16.10.
3

PC2

NIC

172.16.20.
20

255.255.255.0

172.16.20.1

PC3

NIC

172.16.10.11

255.255.255.0

172.16.10.3

PC4

NIC

172.16.20.21

255.255.255.0

172.16.20.1

Port As
signments

Switch

Ports

Assignment

Network

SW1

F0/1
-

F0/5

802.1q Trunks (Native VLAN 99)

172.16.99.0/24

F0/11
-

F0/15

VLAN 20


Marketing

172.16.20.0/24

SW2

F0/1
-

F0/5

802.1q Trunks (Native VLAN 99)

172.16.99.0/24

F0/6
-

F0/10

VLAN 10


Sales

172.16.10.0/24

SW3

F0/1
-

F0/4

802.1q Trunks (Native VLAN 99)

172.16.99.0/24

F0/6
-

F0/10

VLAN 10


Sales

172.16.10.0/24

F0/11
-

F0/15

VLAN 20


Marketing

172.16.20.0/24

VLAN
s Information

VLAN

VLAN Name

VLAN 99 (Native)

Management

VLAN 10

Sales

VLAN 20

Marketing




CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

5


Phase 2
:
Routing Configuration Requirements

The technician is assigned to create
a configuration that meet
s

the following requirements:

1.

Basic configuration for all routers
.

a.

Console Password: cisco

b.

Vty password: cisco

c.

Enable secret password: class

d.

Banner MOTD:

***************************

This is the
<router_name> CLI.

***************************

2.

I
nterfaces

configuration
.

a.

IP address
ing

and subnet mask
ing

according to the Addressing Table
presented in Phase 1

b.

D
escriptions in point
-
to
-
point interfaces:

Link <router1_name>
-

<router2_name>

c.

D
escriptions in LAN interfaces:

LAN <LAN_name>

3.

Routing Configuration.

a.

OSPF with the Process ID 1
0

for R1, R2 and R3

b.

R1
p
ropagates OSPF routing information about all its directly connected
networks

c.

R3
propagates OSPF routing information about all its directly connected
networks

d.

Serial0/0 and
Serial0/1 of R2

are inside the OSPF process

e.

R
2 sends and receives OSPF routin
g
updates through Serial0/0

and Serial0/1
interface
s

f.

R2 has a default gateway toward internet

g.

R2 propagates default route information to R1 and R3

Phase 3: Switching c
onfiguration
Requirements

The technician is assigned to create
a configuration that meets t
he following requirements:

1.

Basic configuration for all switches.

a.

Console Password: cisco

b.

Vty password: cisco

c.

Enable secret password: class

d.

Banner MOTD:

***************************

This is the <switch
_name> CLI.

***************************

CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

6


2.

The Management VLAN has to be accessible from any other device inside the
topology.

3.

Virtual Trunking Protocol:

a.

VTP Domain name: CSCCNA3

b.

SW2 is the VTP Server

c.

SW1 and SW3 are VTP Clients

d.

VTP Domain Password: csccna3

4.

VLAN information is propagated by the VT
P server to other switches.

5.

Every switch has different ports assigned to VLANs according the table presented in
Phase 1.

6.

Spanning Tree Protocol:

a.

Mode: Rapid PVST

b.

SW1 has a priority of 24576 for VLAN 20 and is the se
condary root bridge for
VLAN 10

c.

SW2 is the primary root bridge for VLAN 10 and has
a priority of 28672 for
VLAN 20

d.

SW3 is the
primary root bridge for VLAN 99

e.

All ports in access mode transitioning directly to forwar
d state

7.

Packets can traverse between VLANs, inter
-
VLAN Routing
.

8.

Configure

security on port
s

Fa0/
6 and Fa0/11

on S3:

a.

Port Fa0/6 can
learn 2 different MAC addresses

b.

Port Fa0/6 learns the MAC of PC1 statically and the rest dynamically
. If the
switch

reboots for any reason, the end d
evices that can be connected have

to
be the same.

c.

Port F0/6
drops packets with unknown source addresses until the number of
secure MAC addresses drops below the maximum value.

d.

Port Fa0/11 can learn 3 different MAC addresses.

e.

Port Fa0/
11

learns the MAC of PC2

statically and the rest dynamically. If the
switch reboots for any reason, the end devices that
c
an be connected have

to
be the same.

f.

Port F0/
11
drops packets with unknown source addresses until the number of
secure MAC addresses drops below the maximum v
alue

and causes the
Security

Violation counter to increment.


Phase 4: Wor
k
station Configuration
Requirements

Configure IP Addresses

of end devices according to the Addressing table presented in Phase 1.

CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

7


Phase 5: T
roubleshooting

The technician is assigned
to check the connectivity and performance of the network
implemented.

1.

Ping and Telnet between all devices have to be successful
.

2.

Packets destined fr
om R1 to 209.169.100.4/30 go

through R2 (not the Ethernet LAN)
.

3.

Packets destined fr
om R3 to 209.169.100.0/30

go

through R2 (not the Ethernet LAN)
.

4.

If the link between R1 and SW1 fails
:

a.

Is there connectivity between different VLANs?

b.

Does a

VLAN 20 device have connectivity to the outside?

And

a VLAN 10
device
?

c.

Justify answers a
nd if there are connectivity problems
illustrate possible
solutions.


5.

Check that load balancing

is implemented.

a.

Follow the path of packets for

VLAN 20

to Internet and to other devices on the
network
.

b.

Follow the path of packets for VLAN 10 to Internet and
other devices on the
network.

6.

Check port security in SW3.

The technician
p
rovide
s

documentation that
specifies how the checking

was tested
.

Phase 6: Documenting the Network

In order to support the network properly, documentation is
required. Create documentation
that is logically organized t
o make troubleshooting simpler:

R
outers


show cdp neighbors


show ip interface brief


show ip route


show ip protocol


show interface <type_slot_port>


show version


show startup
-
config


show ip ospf


show ip ospf neighbors

Swi
t
ches


show cdp neighbors


show ip interface brief


show
interfaces trunk


show interface vlan <management vlan>

CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

8



show vlan


show vtp status


show
spanning
-
tree


show port
-
security


show port
-
security

interface <secured port>

Case Study De
liverables

The key lesson of this case study is the importance of thorough and clea
r documentation.
There should be two ty
pes of documentation completed.

General Documentation:


A complete narrative of the project should be typed using word processing
software.


Since the scenarios break up the entire task into pieces, take care to address each

scenario task so that any layperson could understand that particular task.


Microsoft Excel or another spreadsheet program could be used to simply list the

equipm
ent and serial numbers.


Microsoft Visio or any paint program could be used to d
raw the network.


Provide documentation that specifies how the connectivity was tested.

Technical Documentation:

The technical documentation should include details of the networ
k topology. Visio or any paint
program cou
ld be used to draw the network.

The technical documentation has to include a table or tables with the following details:


IP addressing of all interfaces


DCE/DTE information


Router passwords


Banner MOTD


Interface de
scriptions


IP addressing and gateway assignments for all PCs


Router output from the following commands should be captured and placed into this

documentation (for each router):

o

show cdp neighbors

o

show ip interface brief

o

show ip route

o

show ip protocol

o

show
running
-
config

o

show ip ospf neighbors


Switch

output from the following commands should be captured and placed into this

documentation (for each switch
):

o

show cdp neighbors

o

show ip interface brief

CCNA 3
:

LAN Switching and Wireless v4.0


Case Study

9


o

show
interfaces trunk

o

show interface vlan <management vlan>

o

show vlan

o

show vtp status

o

show spanning
-
tree

o

show port
-
security

o

show port
-
security

interface <secured port>