NET323 D: NETWORKS PROTOCOLSRouting Table 5 For a network router to know where to send packets of...

NET323 D:

NETWORKS PROTOCOLS

Lab # 3 : Router Configuration Networks and Communication

Systems Department

TA. Anfal AlHazzaa

1

Lab Objectives 2

To connect two small LANs using Router

To configure router interfaces

To send ICMP message between devices in

different networks

Networks and Communication Systems Department – Prepared By: TA. Anfal AlHazzaa

Lab Content

What is the router?

Routing Table

CLI ( Command Line Interface)

CLI (Command Line Interface) Modes

CLI navigation (example)

Scenario (Connecting two LANs using router)

What is gateway?

3


What is Router?

4

Routers are intermediary network devices.

Routers operate at the network layer (OSI Model's layer

3).

The primary function of a router is Routing (moving

data from one network to another)


Routing Table

5

For a network router to know where to send packets

of data it receives, it uses a routing table.

The routing table contains a list of specific routing

destinations, and when the router receives a packet of

data, it references the routing table to know where to

send that data.

The routing table may also contain information on

how far each destination is from the router. In essence,

a routing table is a map for the router.


CLI ( Command Line Interface)

6

These are the basic modes of a router, which are recognized by the symbols shown in the table (in next slide)

A user needs to know

Which mode he is in.

What are the various commands that he can type in that mode

How to navigate between different modes of a router.


CLI (Command Line Interface) Modes

7

Mode Symbol How to navigate Example of the

commands

1. User mode Router> Default (at start up) We won’t use it

in this course

2. Privilege Mode Router # Enable Show , copy

3. Global Configuration

Mode Router(config)# Config terminal

All

configuration

commands


Note

8

If a user is not sure of what are the commands to be

typed in any mode then he can type the “?” Symbol to

get help, or the list of Commands to be typed in that mode


CLI navigation example

9

Router> enable To navigate from user to privilege mode

Router# config terminal To navigate from privilege mode to global

configuration

Router(config)# global configuration mode

2

1

3


Scenario # 1 10

1. Create two simple LANs (each LAN contains three devices)

2. Connect the two LANs using router (as shown in the following figure)

3. Perform a ping between PC “A” and PC “D” in realtime mode and simulation mode


1. Open The Packet tracer

2. Add three PCs to the workspace ( by select the Generic PC under End Devices and drag it onto the workspace)

3. Rename them and set their IPs as the following:

Note: the network address will be 10.0.0.0 why??

Step 1 (Create the first network) 11

PC name IP Mask

A 10.1.1.1 255.0.0.0

B 10.2.2.2 255.0.0.0

C 10.3.3.3 255.0.0.0


Step 1 (Create the first network) cont.

12

4. Drag Switch-PT to the workspace

5. Using Copper Straight-through cable connect the

three PCs to the switch as the following:

PC name Switch ports

A Fast Ethernet 1/1

B Fast Ethernet 2/1

C Fast Ethernet 3/1


Step 1 (Create the first network) cont.

13

Then perform a ping between PCs to test the connection in real

time mode.


1. Add one PCs and one laptop to the workspace ( by

select the Generic PC and Generic laptop under End

Devices and drag them onto the workspace)

2. Rename them and set their IPs as the following:

Note: the network address will be 192.168.1.0 why??

Step 2 (Create 2nd network) 14

End device

type

name IP Mask

PC D 192.168.1.1 255.255.255.0

laptop E 192.168.1.2 255.255.255.0

laptop G 192.168.1.3 255.255.255.0


Step 2 (Create the 2nd network) cont.

15

3. Drag Switch-PT to the workspace

4. Using Copper Straight-through cable connect the

devices to the switch as the following:

Device name Switch ports

D Fast Ethernet 1/1

E Fast Ethernet 2/1

G Fast Ethernet 3/1


Step 2 (Create the 2nd network) cont.

16

Then perform a ping between devices (PC and laptops) to test the

connection in realtime mode.


Step 3 (Adding Router to connect the two networks)

17

3 4 1

Drag one Generic Router-PT

to the workspace

Using Copper Straight-through

cable connect the Router to the

switch in the 1st network(interface

f0/0) and 2nd network(interface f1/0) Networks and Communication Systems Department – Prepared By: TA. Anfal AlHazzaa

Assign the following IPs to the router interfaces:

Step 4 ( Assigning IPs to router interfaces)

18

Connection IP Mask

Fast Ethernet 0/0 10.1.1.1 255.0.0.0

Fast Ethernet 1/0 192.168.1.1 255.255.255.0


Step 4 ( Assigning IPs to router interfaces) cont.

19

You have to enter to the CLI of the router by

clicking on it and then choose CLI tab

1


Router Interface Configuration Commands

20

Command description

interface f0/0 To select a particular interface for

configuration, use the interface command in

global configuration mode.

Replace f0/0 by the interface that you want to

configure.

ip address [ IP] [ netmask] Replace the IP with the IP address of the

interface in dotted-decimal notation

Replace netmask with Subnet mask of the

interface in dotted-decimal notation (for

example, 255.255.255.0).

no shutdown To enable an interface (bring it up).

Exit To exit from the current configuration mode.


Assigning IP ( f0/0 interface) 21


Assigning IP ( f1/0 interface) 22


Note

23

The difference between end and exit command

End To end the current configuration session and return to privileged mode.

Exit To exit from the current configuration mode.


Gateway

24

Gateway is a network point that acts as an

entrance to another network.


Network # 1

For each PC, change the gateway to 10.1.1.1 which is the

gateway of the first network

Step 5 ( Adding Gateway)

25

The gateway of first network


Step 5 ( Adding Gateway) cont. 26

1

3

Adding gateway

Desktop tab IP configuration enter gateway

*Repeat the same steps for PC “B” and PC “C”

2


Step 5 ( Adding Gateway) cont.

27

Network # 2

For each PC, change the gateway to 192.168.1.1which is

the gateway of the second network

The gateway of second network


Step 5 ( Adding Gateway) cont. 28

1

3

Adding gateway

Desktop tab IP configuration enter gateway

*Repeat the same steps for laptop “E” and laptop “G”

2


Step 6 (Performing a Ping in Realtime mode)

29

Click on PC”A” “Desktop”

tap Command Prompt

Write the following command Ping 192.168.1.2


Step 7 (Performing a Ping in Simulation mode)

30

Change the mode to simulation Click on Edit Filters button ,

uncheck show All/N

check on ICMP,

1 2

4

3


Step 7 (Performing a Ping in Simulation mode)

31

Add Simple PDU tool

Click on it

Click on the first PC

Click on the second PC

Click on Auto Capture/play button to run the Simulation

2

3


Step 8 (Showing Routing table)

32

Use the following command to show the routing table at

privilege mode Show ip route


Step 8 (Showing Routing table) cont.

33

Type

C means that

the network

connected directly

to the router.

Network address

of the connected

network

Interface that used

to connect to the

network


Note

34

Use the following command to show information about

router interfaces Show ip interface brief


Note cont.

35

Interface


IP address of the

interface Interface Status

(Up or Down)

References

36

Cisco Packet Tracer Help

IP Routing. (n.d.). Retrieved 2015, from http://orbit-computer-solutions.com/IP-Routing---

Protocols.php#sthash.WWs87CsQ.dpuf

What is Routing table? (n.d.). Retrieved 2015, from http://www.computerhope.com/jargon/r/routing_table.htm

Sheikh Raashid Javid, (2014) Role Of Packet Tracer In Learning Computer Networks.[Online]. Available at:

International Journ al of Advanced Research in Computer and Communication Engineering (Accessed:2015)

Cisco GSS Command Reference (Software Version 2.0) - Global Configuration Mode Commands [Cisco ACE GSS

4400 Series Global Site Selector Appliances]. (2008, April 1). Retrieved 2015, from

http://www.cisco.com/c/en/us/td/docs/app_ntwk_services/data_center_app_services/gss4400series/v2-

0/command/reference/gss_cr/GlblCfg.html

Using the Command-Line Interface. (2008, January 18). Retrieved 2015, from

http://www.cisco.com/c/en/us/td/docs/ios/12_2/configfun/configuration/guide/ffun_c/fcf001.html

What is gateway? - Definition from WhatIs.com. (n.d.). Retrieved 2015, from

http://searchnetworking.techtarget.com/definition/gateway

Cisco command line basics. (2014, May 27). Retrieved 2015, from http://networkkings.org/ccna/1837/


http://orbit-computer-solutions.com/IP-Routing---Protocols.php












mailto:http://www.computerhope.com/jargon/r/routing_table.htm

http://www.cisco.com/c/en/us/td/docs/app_ntwk_services/data_center_app_services/gss4400series/v2-0/command/reference/gss_cr/GlblCfg.html


















http://networkkings.org/ccna/1837/



NET323 D: NETWORKS PROTOCOLSRouting Table 5 For a network router to know where to send packets of...

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