6.5.1.2 Lab - Building A Switch and Router Network

Lab - Building a Switch and Router Network
Topology
Addressing Table
Device
Subnet
Mask
Default
Gateway
Interface
IP Address
G0/0
192.168.0.1
255.255.255.
0
N/A
G0/1
192.168.1.1
255.255.255.
0
N/A
PC-A
NIC
192.168.1.3
255.255.255.
0
192.168.1.1
PC-B
NIC
192.168.0.3
255.255.255.
0
192.168.0.1
R1
Objectives
Part 1: Set Up the Topology and Initialize
Devices
Part 2: Configure Devices and Verify
Connectivity Part 3: Display Device
Information
Background / Scenario
This is a comprehensive lab to review previously covered IOS commands. In this lab,
you will cable the equipment as shown in the topology diagram. You will then configure
the devices to match the addressing table. After the configurations have been saved,
you will verify your configurations by testing for network connectivity.
After the devices have been configured and network connectivity has been verified,
you will use IOS commands to retrieve information from the devices to answer
questions about your network equipment.
This lab provides minimal assistance with the actual commands necessary to configure
the router. However, the required commands are provided in Appendix A. Test your
knowledge by trying to configure the devices without referring to the appendix.
Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services
Routers (ISRs) with Cisco IOS Release 15.2(4) M3 (universalk9 image). The switches
used are Cisco Catalyst 2960s with Cisco IOS Release 15.0(2) (lanbasek9 image). Other
routers, switches, and Cisco IOS versions can be used. Depending on the model and
Cisco IOS version, the commands available and output produced might vary from what
2015 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public.
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is shown in the labs. Refer to the Router Interface Summary Table at the end of this lab
for the correct interface identifiers.
Note: Ensure that the routers and switches have been erased and have no startup
configurations. Refer to Appendix B for the procedure to initialize and reload a router
and switch.
Required Resources
1 Router (Cisco 1941 with Cisco IOS Release 15.2(4)M3 universal image or comparable)
1 Switch (Cisco 2960 with Cisco IOS Release 15.0(2) lanbasek9 image or comparable)
2 PCs (Windows 7 or 8 with terminal emulation program, such as Tera Term)
Console cables to configure the Cisco IOS devices via the console ports
Ethernet cables as shown in the topology

Note: The Gigabit Ethernet interfaces on Cisco 1941 routers are autosensing and an
Ethernet straight through cable may be used between the router and PC-B. If using
another model Cisco router, it may be necessary to use an Ethernet crossover cable.
Part 1: Set Up Topology and Initialize Devices

Step 1: Cable the network as shown in the topology.
a. Attach the devices shown in the topology diagram, and cable, as necessary.
b. Power on all the devices in the topology.
Step 2: Initialize and reload the router and switch.
If configuration files were previously saved on the router and switch, initialize and
reload these devices back to their basic configurations. For information on how to
initialize and reload these devices, refer to Appendix B.
Part 2: Configure Devices and Verify Connectivity
In Part 2, you will set up the network topology and configure basic settings, such as the
interface IP addresses, device access, and passwords. Refer to the Topology and
Addressing Table at the beginning of this lab for device names and address
information.
Note: Appendix A provides configuration details for the steps in Part 2. You should
attempt to complete Part 2 prior to reviewing this appendix.
Step 1: Assign static IP information to the PC interfaces.
a. Configure the IP address, subnet mask, and default gateway settings on PC-A.
b. Configure the IP address, subnet mask, and default gateway settings on PC-B.
c. Ping PC-B from a command prompt window on PC-A.
Why were the pings not successful?
Because, router connections were not configured.
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Step 2: Configure the router.

a. Console into the router and enable privileged EXEC mode.
Router> enable
Router#
b. Enter configuration mode.
Router# config terminal
Router (config) #
c. Assign a device name to the router.
Router (config) # hostname R1
d. Disable DNS lookup to prevent the router from attempting to translate incorrectly
entered commands as though they were host names.
R1 (config) # no ip domain-lookup
e. Assign class as the privileged EXEC encrypted password.
R1 (config) # enable secret class
f.
Assign cisco as the console password and enable login.

R1 (config) # enable secret cisco
g. Assign cisco as the VTY password and enable login.

R1 (config) # line vty 0 4
R1 (config-line) # password cisco
R1 (config-line) # login
R1 (config-line) # exit
R1 (config) #
h. Encrypt the clear text passwords.
R1 (config) # service password-encryption
i.
Create a banner that warns anyone accessing the device that unauthorized access is
prohibited.
R1 (config) # banner motd #
Enter TEXT message. End with the character #.
Unauthorized access prohibited!
#
R1 (config) #
j.
Configure and activate both interfaces on the router.

R1 (config) # int g0/0
R1 (config-if) # description connection to PC-B.
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R1 (config-if) # ip address 192.168.0.1 255.255.255.0

R1 (config-if) # no shutdown
R1 (config-if) #
R1 (config-if) # int g0/1

R1 (config-if) # ip address 192.168.1.1 255.255.255.0
R1 (config-if) # no shutdown
R1 (config-if) # exit
R1 (config) # exit
k. Configure an interface description for each interface indicating which device is

connected to it.
l.
Save the running configuration to the startup configuration file.

R1 # copy running-config startup-config
m. Set the clock on the router.

R1 # clock set 17:00:00 29 Nov 2012
R1 #
Note: Use the question mark (?) to help with the correct sequence of parameters
needed to execute this command.
n. Ping PC-B from a command prompt window on PC-A.
Were the pings successful? Why?
No, because switch is configured.
Part 3: Display Device Information
In Part 3, you will use show commands to retrieve information from the router and
switch.
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Step 1: Retrieve hardware and software information from the network devices.
a. Use the show version command to answer the following questions about the router.
What is the name of the IOS image that the router is running?
Cisco IOS Software
How much DRAM memory does the router have?
64 bits wide
How much NVRAM memory does the router have?
255 k
How much Flash memory does the router have?
491520K/32768K bytes of memory

b. Use the show version command to answer the following questions about the switch.
What is the name of the IOS image that the switch is running?
Cisco IOS Software C290 Software
How much dynamic random access memory (DRAM) does the switch have?
21039 bytes
How much nonvolatile random-access memory (NVRAM) does the switch have?
63488k bytes
What is the model number of the switch?
WS-C2960-24TT
Step 2: Display the routing table on the router.
Use the show ip route command on the router to answer the following questions.
What code is used in the routing table to indicate a directly connected network?
c -connected
How many route entries are coded with a C code in the routing table?
Two
What interface types are associated to the C coded routes?
Gigabitethernet0/0
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Gigabitethernet0/1
Step 3: Display interface information on the router.

Use the show interface g0/1 to answer the following questions.
What is the operational status of the G0/1 interface?
Gogabitethernet0/1 is up, line control protocol is up
What is the Media Access Control (MAC) address of the G0/1 interface?
Mac: 00d0.ffd5.4702
How is the Internet address displayed in this command?
192.168.1.1/24
Step 4: Display a summary list of the interfaces on the router and switch.
There are several commands that can be used to verify an interface configuration.
One of the most useful of these is the show ip interface brief command. The
command output displays a summary list of the interfaces on the device and provides
immediate feedback to the status of each interface. a. Enter the show ip interface
brief command on the router.
R1# show ip interface brief
Interface
IP- OK? Method Status
Protocol
Embedded-Service-Engine0/0 unassigned
YES unset administratively down
down
GigabitEthernet0/0
192.168.0.1
YES manual up
up
GigabitEthernet0/1
192.168.1.1
YES manual up
up
Serial0/0/0
unassigned
YES unset administratively down down
Serial0/0/1
unassigned
YES unset administratively down down
R1#
b. Enter the show ip interface brief command on the switch.
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Switch# show ip interface brief

Interface
IP-Address
OK? Method Status
Vlan1
unassigned
YES manual up
FastEthernet0/1
unassigned
YES unset down
FastEthernet0/2
unassigned
YES unset down
FastEthernet0/3
unassigned
YES unset down
FastEthernet0/4
unassigned
YES unset down
FastEthernet0/5
unassigned
YES unset up
FastEthernet0/6
unassigned
YES unset up
FastEthernet0/7
unassigned
YES unset down
FastEthernet0/8
unassigned
YES unset down
FastEthernet0/9
unassigned
YES unset down
FastEthernet0/10
unassigned
YES unset down
FastEthernet0/11
unassigned
YES unset
down
FastEthernet0/12
unassigned
YES unset down
FastEthernet0/13
unassigned
YES unset down
FastEthernet0/14
unassigned
YES unset down
FastEthernet0/15
unassigned
YES unset down
FastEthernet0/16
unassigned
YES unset down
FastEthernet0/17
unassigned
YES unset down
FastEthernet0/18
unassigned
YES unset down
FastEthernet0/19
unassigned
YES unset down
FastEthernet0/20
unassigned
YES unset down
FastEthernet0/21
unassigned
YES unset down
FastEthernet0/22
unassigned
YES unset down
FastEthernet0/23
unassigned
YES unset down
FastEthernet0/24
unassigned
YES unset down
GigabitEthernet0/1
unassigned
YES unset down
GigabitEthernet0/2
unassigned
YES unset down
Switch#
Protocol
up
down
down
down
down
up
up
down
down
down
down
down
down
down
down
down
down
down
down
down
down
down
down
down
down
down
down
Reflection
1. If the G0/1 interface showed administratively down, what interface configuration
command would you use to turn the interface up?
R1(config-if)#no shut
2. What would happen if you had incorrectly configured interface G0/1 on the router with
an IP address of 192.168.1.2?
PC-A would not be able to ping PC-B. This is because PC-B is on a different network than
PC-A which requires the default-gateway router to route these packets. PC-A is configured
to use the IP address of 192.168.1.1 for the default-gateway router, but this address is not
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assigned to any device on the LAN. Any packets that need to be sent to the defaultgateway for routing will never reach their destination.
Router Interface Summary Table
Router Interface Summary
Router
Model
Ethernet
Interface #1
Ethernet
Interface #2
Serial
Interface #1
Serial Interface
#2
1800
Fast Ethernet 0/0

(F0/0)
Fast Ethernet 0/1

(F0/1)
Serial 0/0/0
(S0/0/0)
Serial 0/0/1
(S0/0/1)
1900
Gigabit Ethernet
0/0 (G0/0)
Gigabit Ethernet
0/1 (G0/1)
Serial 0/0/0
(S0/0/0)
Serial 0/0/1
(S0/0/1)
2801
Fast Ethernet 0/0

(F0/0)
Fast Ethernet 0/1

(F0/1)
Serial 0/1/0
(S0/1/0)
Serial 0/1/1
(S0/1/1)
2811
Fast Ethernet 0/0

(F0/0)
Fast Ethernet 0/1

(F0/1)
Serial 0/0/0
(S0/0/0)
Serial 0/0/1
(S0/0/1)
2900
Gigabit Ethernet
0/0 (G0/0)
Gigabit Ethernet
0/1 (G0/1)
Serial 0/0/0
(S0/0/0)
Serial 0/0/1
(S0/0/1)
Note: To find out how the router is configured, look at the interfaces to identify the router
type and how many interfaces the router has. There is no way to effectively list all the
combinations of configurations for each router class. This table includes identifiers for the
possible combinations of Ethernet and Serial interfaces in the device. The table does not
include any other type of interface, even though a specific router may contain one. An
example of this might be an ISDN BRI interface. The string in parenthesis is the legal
abbreviation that can be used in Cisco IOS commands to represent the interface.
Page 8 of 8

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What are the objectives of this lab?

What are the objectives of this lab?

What steps are required to configure the devices and verify connectivity?

What steps are required to configure the devices and verify connectivity?

Lab - Building a Switch and Router Network

Lab - Building a Switch and Router Network

2 PCs (Windows 7 or 8 with terminal emulation program, such as Tera Term)

Ethernet cables as shown in the topology

Part 1: Set Up Topology and Initialize Devices

Lab - Building a Switch and Router Network

Step 2: Configure the router.

Assign cisco as the console password and enable login.

g. Assign cisco as the VTY password and enable login.

Configure and activate both interfaces on the router.

Lab - Building a Switch and Router Network

R1 (config-if) # ip address 192.168.0.1 255.255.255.0

R1 (config-if) # int g0/1

k. Configure an interface description for each interface indicating which device is

Save the running configuration to the startup configuration file.

m. Set the clock on the router.

Lab - Building a Switch and Router Network

491520K/32768K bytes of memory

Lab - Building a Switch and Router Network

Step 3: Display interface information on the router.

Lab - Building a Switch and Router Network

Switch# show ip interface brief

Lab - Building a Switch and Router Network

Fast Ethernet 0/0

Fast Ethernet 0/1

Fast Ethernet 0/0

Fast Ethernet 0/1

Fast Ethernet 0/0

Fast Ethernet 0/1

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