a tcp/ip lab course magda el zarki dept. of ics uc, irvine [email protected]

A TCP/IP Lab Course

Magda El Zarki

Dept. of ICS

UC, Irvine

[email protected]

June 13th, 2001 Magda El Zarki - TCP/IP Lab 2

Outline of Presentation Acknowledgment Motivation Course Layout Lab Set Up Sample Experiment Conclusions


Origin of this Course I would like to thank Professor Shivendran

Panwar and Jeong-dong Ryoo of the Dept. of Elc. Eng. at Polytechnic University, Brooklyn, NY, for giving us their lab notes from their EL 537 course. The content for this lab manual was derived from their lab manual, the material has been modified to reflect the laboratory set-up that we have at UCI


Motivation Regular in class course -> in one ear

out the other Hands on lab experience hammers the

concepts in Students learn to extract the theories

taught in the regular course and apply it to real situations


Is it Working? Course is very successful Teach it every quarter: senior Ugrads

and 1st yr Grads Have to cap the class size due to

resource limitations (equipment and lab assistants)

Students claim that they finally learnt something!


Course Layout 10 weeks: 8 weeks of labs, 1 week midterm,

1 week course review, final exam One lecture a week - 3hrs Lecture consists of 2 parts:

– Overview of topic covered by lab, reference an assigned text

– Demonstration of the experiment We have installed in the lecture hall a similar setup as

the one used by the students Overhead projector enables professor to show actual

experiment set up and results/outputs


Course Outline

Each Lab is on a specific topic and spans a 2 week period -> part 1 and part 2, reports are due for each part.

Lab 1: Introduction Lab 2: Bridging Lab 3: Routers Lab 4: TCP and UDP


Lab 1 - Objectives Read the following sections in the assigned text:… Getting acquainted with the Linux and Xwindows

environment Preview of some TCP/IP diagnostic tools Capturing link/IP/TCP layer header The usage of port numbers and IP protocol field Subnetting ARP Configuring Interfaces


Week 1: Introduction Discuss lab rules Describe equipment and lab set up Outline course requirements and grading:

– Weekly lab reports– Midterm and Final

Simple experiments to introduce them to Linux and the monitoring and configuration tools that they will use


Sample Lab Rules Work in groups of max. size 4. Indicate in your lab report for

the week who was in your group The lab is open and groups can work on their experiments at

any time All reports are due one week after your lab (beginning of

class). Each student in a group must submit his/her own laboratory report

You should read all pertinent chapters and bring the textbook and a 3.5” floppy disk to each session of the laboratory

Always check PC and router/bridge configurations, make no assumptions as to their set-up.DO NOT turn of the PCs


Equipment Description 4 routers 4 hubs 4 PCs 1 switch box to share 1

monitor, 1 keyboard, and 1 mouse

1 console 1 19” rack


Monitoring Tools Ethereal and tethereal: excellent

monitoring tools that have replaced tcpdump

netstat, ping, traceroute Understanding the packet headers


Week 2: Configuring Interfaces Using ifconfig Setting IP addresses and using subnet

masks Operation of ARP


Lab 2: Data Link Layer - Bridging Configuration of Bridges/Routers Simple Bridge Experiment Spanning Tree algorithm


Lab 3: IP Layer - Routers & Routing

Static Routing RIP OSPF ICMP Mixed Bridge/Router experiment


Lab 4: Transport Layer The SOCK program UDP FTP and TFTP TCP


Lab Set Up The lab where the equipment is housed

is an open lab We have 5 - 19” racks with equipment Each rack is self contained Equipment is isolated Students must save data to floppies and

analyze and print data on other systems


Picture of Lab Set Up


Course Personnel One faculty member One TA and 2 graders per 50 - 70 students

(recommended) TA spends 9hrs a week in lab helping

students, each grader spends approx. 15hrs grading a week.

Faculty member spends 3hrs a week in lab Lab with 5 racks can handle approx. 65

students with open hours


Flow of Experiments Configuring the experiment Do a particular exercise Answer related questions More exercises and corresponding

questions Write report


Configuring an Experiment A 4 Subnet Experiment

In this experiment, we divide the network into four subnets. There will be one machine in each of the following subnets, 154.81.51.0, 154.81.52.0, 154.81.53.0 and 154.81.54.0. As shown in figure 3.2, we will connect the four subnets (154.81.51.0, 154.81.52.0, 154.81.53.0, and 154.81.54.0) using three routers.

In order to configure the new network topology, we need to change the current IP addresses of each PC interface card. The new IP addresses that we want to use are as shown in the figure. (Note that 52.100 is an abbreviation for 154.81.52.100. This notation applies to all the PC and router addresses given in the figure above.)


Configuration

Eth0:51.1Eth1:52.1

Eth0: 53.2Eth1: 52.2

Eth0:53.3Eth1:54.3

53.100

51.100

54.100 52.100

154.81.53.0 154.81.51.0

154.81.54.0 154.81.52.0

Router1Router2Router3


Exercises: Change the IP addresses of the PCs to reflect the

network configuration as shown in the figure. Also configure the routers. Save the output of netstat -rn or route –ee before building the PCs’ routing tables. After examining the figure, build the static routing tables in all the PCs manually. Use netstat –rn or route –ee to verify your entries.

Use the ping and traceroute programs to test the connections. Save the traceroute outputs


Questions and Report What is the subnet mask for this subnetted

network? For each IP address that you assigned, identify the

subnet ID and the host ID. Compare the contents of the four route outputs.

What do you observe? Discuss the different entries and the corresponding flags.

Analyze the tethereal output and explain what happens using the content of the tethereal file


Conclusions: A fun course to teach Self managed Very popular with students Co-authoring a self contained text with

Shiv Panwar and Jorg Liebherr,to appear in 2002

Will contain more labs to fill a semester course

a tcp/ip lab course magda el zarki dept. of ics uc, irvine [email protected]

Documents