lab%204-ICMP - Rochester Institute of Technology Department...

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Rochester Institute of Technology Department of Networking, Security, and Systems Administration 4050-515/4055-815 - 1- 2007 4050-515/4055-815 Lab 4 - Gateways and ICMP Overview This lab introduces you to host routing tables, how they are populated and the commands required to manually configure the routing table for a Cisco router. Be sure to document all your answers with appropriate screen or packet captures. Notation The symbol T will be used in IP addresses, machine names, etc. to denote your table number. Replace each T with your table number. The symbol M will be similarly used to denote the number of a machine on your bench. Machines are numbered 1, 2, and 3 from left to right. The symbol X will be used to distinguish which side of the lab you are working on. Replace the X with a 0 if you are on the Startrek side of the lab or replace it with a 1 if you are on the Oz side of the lab. Activity 1 - Configure the Cisco 2514 as a Router 1. Physically configure your bench topology per the following diagram using the subnet mask of 255.255.255.0 on each PC: PC #1 10.10X.TT.1 GW=10.10X.TT.254 Hub Bench 2514 Router PC #2 10.10X.T.2 GW=”leave empty” PC #3 10.10X.TT.3 GW=10.10X.TT.254 E1 E0 10.10X.TT.254 10.10X.T.253 2. On the Cisco router do not use the power up setup configuration scheme. Just say NO when asked to enter setup configuration. Instead you will be configuring the device manually. 3. Set up each of the router interfaces with the IP addresses noted above and use 24 bit subnetting. Make sure that routing is enabled for the device. After issuing the “enable” command and the “config t” command, move to either of the two Ethernet interfaces. At each interface configure the IP address and mask using the ip address command. 4. Issue the “no shutdown” command after you set the IP address.
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Rochester Institute of Technology Department of Networking, Security, and Systems Administration 4050-515/4055-815 - 2- 2007 Activity 2 - Gather Data 1. To aid you in the analysis of the frames and packets gathered, determine the MAC addresses of each of the interfaces on your router and the PC's. Record your MAC and IP addresses below. This information must be included in your lab report. Interface IP address MAC address E0 E1 PC1 PC2 PC3 Activity 3 - Testing the Router 1. Start an Ethereal capture on both PC1 and PC2. Ping –n 2 PC1 Æ PC2. Does it work? Examine the routing tables of PC#1, PC#2 and the Cisco router. Based upon your examination of these routing tables and your frame captures explain why the ping PC1 --> PC2 failed. In other words, at precisely what point does it fail and why? We are interested in the decision process. What is the message displayed on the screen of PC1 when the ping fails? 2. While capturing with Ethereal on both PCs ping in the opposite direction (PC2 Æ PC1).
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  • Spring '08
  • Mishra
  • IP address, Router, technology department, Systems Administration, Rochester Institute, Rochester Institute of Technology Department of Networking

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