CSE3153 Semester 2 2006 Case Study 2 V1.0

The 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: _____________

CSE5807 Semester 2 2006 Case Study 2 V1.0

The 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: _____________

Packet Tracer V3.2

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

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Case Study 2 – The Concept of IP Subnetting Network Address 35.0.0.0/18 Subnet 152 Brisbane Router S 2/0 DCE Serial Cable S 2/0 Adelaide Router Fa 0/0 Fa 0/0 UTP Cable Subnet 85 Subnet 92 Bris_Hub Host 262 Bris PC Adel_Hub Adel PC Host 520 CSE5807 - Case Study 2 4

Brisbane Router - Configuration

! The FastEthernet interface configuration: interface fa 0/0 ip address <

replace with address

> 255.255.192.0

description Link to Brisbane Hub, Subnet 85 no shutdown ! The Serial interface configuration: interface serial 2/0 ip address <

replace with address

> 255.255.192.0

! This is DCE end of the link clock rate 64000 description Link to Adelaide Router, Subnet 152 no shutdown ! Set hostname of the router hostname Brisbane CSE5807 - Case Study 2 5

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 2 6

Adelaide Router - Configuration

! The FastEthernet interface configuration: interface fa 0/0 ip address <

replace with address

> 255.255.192.0

description Link to Adelaide Hub, Subnet 92 no shutdown ! The Serial interface configuration: interface serial 2/0 ip address <

replace with address

> 255.255.192.0

description Link to Brisbane Router, Subnet 152 no shutdown ! Set hostname of the router hostname Adelaide CSE5807 - Case Study 2 7

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 2 8

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?

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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 2 10

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?

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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 2 12

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 2 13

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 CSE5807 - Case Study 2 14