CSE3153Semester 2 2006

Case Study 2 V1.0The Concept of IP Subnetting

Tutor keeps this front sheet as record of completion

Student Name: __________________________________________

Student Id: ____________________

Marks: 2.5 towards Unit Result

You must demonstrate to your tutor that you have completed the case study

Tutor Name: ____________________________________________

Tutor Signature: _____________________ Date: _____________

CSE5807Semester 2 2006

Case Study 2 V1.0The Concept of IP Subnetting

Student keeps this front sheet as record of completion

Due Date: By end of week 6 Lab Session

Student Name: __________________________________________

Student Id: ____________________

Marks: 2.5 towards Unit Result

You must demonstrate to your tutor that you have completed the case study

Tutor Name: ____________________________________________

Tutor Signature: _____________________ Date: _____________

CSE5807 - Case Study 23

Packet Tracer V3.2

• A simulation product for designing, and testing a network before implementation on the actual hardware devices.

CSE5807 - Case Study 24

Brisbane Router Adelaide Router

Bris_Hub Adel_Hub

Subnet 92Subnet 85

Network Address35.0.0.0/18

UTP Cable

Serial Cable

BrisPC

AdelPC

Case Study 2 – The Concept of IP Subnetting

Fa 0/0 Fa 0/0

S 2/0

S 2/0DCE

Subnet 152

Host 262 Host 520

CSE5807 - Case Study 25

Brisbane Router - Configuration

! The FastEthernet interface configuration:

interface fa 0/0ip address <replace with address> 255.255.192.0description Link to Brisbane Hub, Subnet 85no shutdown

! The Serial interface configuration:

interface serial 2/0ip address <replace with address> 255.255.192.0! This is DCE end of the linkclock rate 64000description Link to Adelaide Router, Subnet 152no shutdown

! Set hostname of the router

hostname Brisbane

CSE5807 - Case Study 26

Brisbane PC - Configuration

• Need to set the PC’s IP address to address of Host 262

• Need to set PC’s subnet mask to 255.255.192.0

• Need to set PC’s gateway

CSE5807 - Case Study 27

Adelaide Router - Configuration

! The FastEthernet interface configuration:

interface fa 0/0ip address <replace with address> 255.255.192.0description Link to Adelaide Hub, Subnet 92no shutdown

! The Serial interface configuration:

interface serial 2/0ip address <replace with address> 255.255.192.0description Link to Brisbane Router, Subnet 152no shutdown

! Set hostname of the router

hostname Adelaide

CSE5807 - Case Study 28

Adelaide PC - Configuration

• Need to set the PC’s IP address to address of Host 262

• Need to set PC’s subnet mask to 255.255.192.0

• Need to set PC’s gateway

CSE5807 - Case Study 29

Link (Point-to-Point) Testing

• Use the ping command to test each link is working

• Note you cannot ping from Brisbane PC to Adelaide PC, Why is this the case?

CSE5807 - Case Study 210

Routing Protocols

Brisbane Router

router rip

version 2

network <replace with network address>

Adelaide Router

router rip

version 2

network <replace with network address>

CSE5807 - Case Study 211

Path (End-to-End) Testing

• Use the ping, and traceroute command to test a path exists between the Brisbane PC and the Adelaide PC

• If a path exists, Why is this the case?

CSE5807 - Case Study 212

Discussion Points

• Concept of IP Subnetting

– IP Address Classes

– Classful Address

– Two Level Classful Hierarchy• Network-Prefix, Host-Number• Routing tables growing in size• Local administrators had to request another

network number, before a new network could be installed at their site

CSE5807 - Case Study 213

Discussion Points

• Concept of IP Subnetting

– Three Level Subnet Hierarchy• Network Prefix, Subnet-Number, Host-Number• Subnet structure not visible to external Internet• The routers within the internal network need to

differentiate between individual subnets• Internet routers, all subnets within internal

networks collected into a single routing table entry• Route Flapping

– Subnet Address Mask

CSE5807 - Case Study 214

Discussion Points

• Router IOS Modes– User Executive– Privileged Executive – Global Configuration– Interface Configuration– Router Configuration

• System Testing and Trouble Shooting– Step by Step Testing– Link (Point-to-Point) Testing– Path (End-to-End) Testing– Use of show commands– Use of debug commands