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552ferdon 4.3switchandping

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  • 1. Susan
Ferdon,
EDTECH
552
SP11
Module 5, Assignment 4-24.3 Building a Switch-based NetworkObjective  Create a simple network with four PCs using a switch  Configure workstation IP address information  Test connectivity using the ping command  Observe how switches learn MAC addressesStep 3 Configure TCP/IP settings for the four PCs a. Set the IP address information for each PC according to the information in the table. b. Note that the default gateway IP address is not required, since these computers are directly connected. The default gateway is only required on local area networks that are connected to a router. Computer IP Address Subnet mask Default Gateway Fred 192.168.1.1 255.255.255.0 Not Required Barney 192.168.1.2 255.255.255.0 Not Required Wilma 192.168.1.3 255.255.255.0 Not Required Betty 192.168.1.4 255.255.255.0 Not RequiredStep 8 Observe how a switch learn MAC addressesQ 4.3.1: Please briefly describe data flows of the ping event and compare them with thecontent on the textbook (p. 177-180).Ping traveled from Barney to the switch. When the ping arrived, the switch learnedBarney’s MAC address. The switch did not have Fred in the MAC Table, so the switchflooded the other ports (Betty, Wilma, Fred). Wilma and Betty were not the intendedrecipient so they were marked “X” in packet tracer and the frame was discarded. Fredwas the correct recipient so a return ping went back to Barney, via the switch. With Fredas the source, the switch was able to learn Fred’s MAC address. The return ping, fromFred, arrived at device Barney successfully.Compare this ping event to the content of the textbook (p. 177-180):
  • 2. Susan
Ferdon,
EDTECH
552
SP11
  Both events began with an empty MAC Table.  As mentioned on page 177, if a frame enters the switch and the source MAC address is not in the MAC address table, the switch creates an entry. This is what happened when Barney’s ping arrived at the switch – the switch added Barney to the MAC Table.  In the book, there is no address in the MAC Table, so the switch floods the ports. The same happened in our example.  In the example on page 178, the next MAC address is added after frame 2. The same thing happens when Fred pings back – Fred’s MAC address is added to the Table when it pinged back Barney.  The book discussed Spanning Tree Protocol (STP). There is no evidence of STP in the packet tracer simulation. All end-devices are operating as expected – powered on and responding - and there are no loop-backs.My screen capture video of this process may be viewed at:http://www.youtube.com/watch?v=m92vQiUD2wMStep 9 Please save your packet tracer file and submit it with this week’s labactivitiesLab 4.4 Collision and Broadcast DomainsThe purpose of this lab is to observe how several small domains reduce the negativeeffects of a large collision domain.Objective  Use Packet Tracer to observe the function differences between switch and hubStep1  Download NA01-0815.pkt (http://edtech2.boisestate.edu/hungj/edtech552/spring2011/lab/lab4/2011/NA01-0815.zip)  Unzip and open it in the packet tracer.Step 2 Switch to the simulation modeStep 3 Enable switch MAC address tableStep 4 Enable PDU list window and ARP & ICMP eventsStep 5 Send the following simple PDU events  Ping Fred –> Wilma  Ping Wilma -> Barney  Ping Wilma -> Barney  Ping Betty -> Wilma  Ping Fred -> Barney