NAD710 Lab9

Objectives

• Setup a LAN with three subnets
• Use the route and sysctl command to configure a Linux router
• Use the network analyzing tools to study the changes in IP header when a packet crossing a router

Hardware Requiremetns

• Five Linux Machines (FC8/FC9)
• Two network switches (D-Link)
• Seven Cat 5 straight through cables

Procedure

• Setup THREE networks:
  • Network A: 10.0.0.0/8,
  • Network B: 172.16.0.0/16, and
  • Network C: 192.168.1.0
• Setup THREE Hosts, one in each network
  • Host A: 10.0.0.1
  • Host B: 172.16.0.1
  • Host C: 192.168.1.1
• Setup TWO Linux routers: Router R-ab and R-bc
  • Router R-ab: eth0 10.0.0.254, eth1 172.16.0.254
  • Router R-bc: eth0 172.16.254.254, eth1 192.168.1.254
• Use the ping command to verify that ALL 5 Linux systems (three hosts and two routers) can communicate with each other.
• Run the appropriate commands on ALL five Linux systems to capture IP packets that are coming in and going out on each network interface and save to separate files
• Use the wireshark package to study the IP header and investigate what fields were changed when a packet move from the source to the destination with routers in between the path.

Completing the Lab

Write up a report on your findings with a properly labeled network diagram and the commands used to setup the LAN. Email your report in PDF format to your instructor by the due date