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June 13th, 2001 Magda El Zarki - TCP/IP Lab 2
Outline of Presentation Acknowledgment Motivation Course Layout Lab Set Up Sample Experiment Conclusions
June 13th, 2001 Magda El Zarki - TCP/IP Lab 3
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 4
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 5
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!
June 13th, 2001 Magda El Zarki - TCP/IP Lab 6
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 7
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 8
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 9
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 10
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 11
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 12
Monitoring Tools Ethereal and tethereal: excellent
monitoring tools that have replaced tcpdump
netstat, ping, traceroute Understanding the packet headers
June 13th, 2001 Magda El Zarki - TCP/IP Lab 13
Week 2: Configuring Interfaces Using ifconfig Setting IP addresses and using subnet
masks Operation of ARP
June 13th, 2001 Magda El Zarki - TCP/IP Lab 14
Lab 2: Data Link Layer - Bridging Configuration of Bridges/Routers Simple Bridge Experiment Spanning Tree algorithm
June 13th, 2001 Magda El Zarki - TCP/IP Lab 15
Lab 3: IP Layer - Routers & Routing
Static Routing RIP OSPF ICMP Mixed Bridge/Router experiment
June 13th, 2001 Magda El Zarki - TCP/IP Lab 16
Lab 4: Transport Layer The SOCK program UDP FTP and TFTP TCP
June 13th, 2001 Magda El Zarki - TCP/IP Lab 17
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 18
Picture of Lab Set Up
June 13th, 2001 Magda El Zarki - TCP/IP Lab 19
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 20
Flow of Experiments Configuring the experiment Do a particular exercise Answer related questions More exercises and corresponding
questions Write report
June 13th, 2001 Magda El Zarki - TCP/IP Lab 21
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.)
June 13th, 2001 Magda El Zarki - TCP/IP Lab 22
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 23
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 24
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
June 13th, 2001 Magda El Zarki - TCP/IP Lab 25
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