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Lab - Basic Switch and End Device Configuration Topology Addressing Table Device Interface IP Address Subnet Mask S1 VLAN 1 192

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Lab - Basic Switch and End Device Configuration

Topology

Addressing Table

Device	Interface	IP Address	Subnet Mask
S1	VLAN 1	192.168.1.1	255.255.255.0
S2	VLAN 1	192.168.1.2	255.255.255.0
PC-A	NIC	192.168.1.10	255.255.255.0
PC-B	NIC	192.168.1.11	255.255.255.0

Objectives

Part 1: Build and Configure the Network

Part 2: Examine the Switch MAC Address Table

Background / Scenario

In this lab, you will build a simple network with two hosts and two switches. You will also configure basic settings including hostname, local passwords, and login banner. Use show commands to display the running configuration, IOS version, and interface status. Use the copy command to save device configurations.

You will apply IP addressing for this lab to the PCs and switches to enable communication between the devices. Use the ping utility to verify connectivity. In Part 2, you will ping various devices and observe how the two switches build their MAC address tables.

 

Required Resources

• 2 Switches (Cisco 2960 with Cisco IOS Release 15.0(2) lanbasek9 image or comparable)
• 2 PCs (Windows with terminal emulation program, such as Tera Term)
• Ethernet cables as shown in the topology

Instructions

Part 1: Build and Configure the Network

1. 329332. 1: Set Up the Network Topology

In this step, you will cable the devices together according to the network topology.

1. 18. 1. Connect the two switches.
       2. Connect the PCs to their respective switches.
   329332. 2: Configure PC Hosts
           1. Configure static IP address information on the PCs according to the Addressing Table.
           2. Verify PC settings and connectivity.
   329332. 3: Configure and Verify Basic Switch Settings
           1. Console into the switch. Enter the global configuration mode.
           2. Give the switch a name according to the Addressing Table.
           3. Prevent unwanted DNS lookups.
           4. Enter local passwords. Use class as the privileged EXEC password and cisco as the password for console access.
           5. Configure and enable the SVI according to the Addressing Tabl
           6. Enter a login MOTD banner to warn about unauthorized access.
           7. Save the configuration.
           8. Display the current configuration.
           1. Display the IOS version and other useful switch information.
           10. Display the status of the connected interfaces on the switch.
           11. Configure switch S2.
           50. Record the interface status for the following interfaces.
           1000. From a PC, ping S1 and S2. The pings should be successful.
           14. From a switch, ping PC-A and PC-B. The pings should be successful.

Interface	S1 Status	S1 Protocol	S2 Status	S2 Protocol
F0/1	blank	blank	blank	blank
F0/6	blank	blank	blank	blank
F0/18	blank	blank	blank	blank
VLAN 1	blank	blank	blank	blank

 

 

 

 

Part 2: Examine the Switch MAC address table

A switch learns MAC addresses and builds the MAC address table, as network devices initiate communication on the network.

329332. 1: Record network device MAC addresses.
        1. 1. 1. Open a command prompt on PC-A and PC-B and type ipconfig /all.

Open Windows command prompt

Question:

What are the Ethernet adapter physical addresses?

PC-A MAC Address:

Type your answers here.

PC-B MAC Address:

Type your answers here.

Close Windows command prompt

1. 1. 1. 2. Console into switch S1 and S2 and type the show interface F0/1 command on each switch.

Open a configuration window

Questions:

On the second line of command output, what is the hardware addresses (or burned-in address [bia])?

S1 Fast Ethernet 0/1 MAC Address:

Type your answers here.

S2 Fast Ethernet 0/1 MAC Address:

Type your answers here.

 

329332. 2: Display the switch MAC address table.

Console into switch S2 and view the MAC address table, both before and after running network communication tests with ping.

1. 1. 1. 1. Establish a console connection to S2 and enter privileged EXEC mode.

Open a configuration window

1. 1. 1. 2. In privileged EXEC mode, type the show mac address-table command and press Enter.

S2# show mac address-table

Even though there has been no network communication initiated across the network (i.e., no use of ping), it is possible that the switch has learned MAC addresses from its connection to the PC and the other switch.

 

Questions:

Are there any MAC addresses recorded in the MAC address table?

type your answers here.

 

What MAC addresses are recorded in the table? To which switch ports are they mapped and to which devices do they belong? Ignore MAC addresses that are mapped to the CPU.

Type your answers here.

If you had not previously recorded MAC addresses of network devices in Step 1, how could you tell which devices the MAC addresses belong to, using only the output from the show mac address-table command? Does it work in all scenarios?

 

329332. 3: Clear the S2 MAC address table and display the MAC address table again.
        1. 1. 1. In privileged EXEC mode, type the clear mac address-table dynamic command and press Enter.

S2# clear mac address-table dynamic

1. 1. 1. 2. Quickly type the show mac address-table command again.

 

Questions:

Does the MAC address table have any addresses in it for VLAN 1? Are there other MAC addresses listed?

Type your answers here.

Wait 10 seconds, type the show mac address-table command, and press Enter. Are there new addresses in the MAC address table?

Type your answers here.

 

 

329332. 4: From PC-B, ping the devices on the network and observe the switch MAC address table.
        1. 1. 1. From PC-B, open a command prompt and type arp -a.

Open a command prompt

Question:

Not including multicast or broadcast addresses, how many device IP-to-MAC address pairs have been learned by ARP?

Type your answers here.

1. 1. 1. 2. From the PC-B command prompt, ping PC-A, S1, and S2.

Question:

Did all devices have successful replies? If not, check your cabling and IP configurations.

Type your answers here.

Close a command prompt

1. 1. 1. 3. From a console connection to S2, enter the show mac address-table command.

Open a configuration window

Question:

Has the switch added additional MAC addresses to the MAC address table? If so, which addresses and devices?

Type your answers here.

Close a configuration window

Open a command prompt

From PC-B, open a command prompt and retype arp -a.

Question:

Does the PC-B ARP cache have additional entries for all network devices that were sent pings?

Type your answers here.

 

 

Reflection Question

Why some FastEthernet ports on the switches are up and others are down?

Type your answers here.

What could prevent a ping from being sent between the PCs?
 

Type your answers here.

 

 

On Ethernet networks, data is delivered to devices by their MAC addresses. For this to happen, switches and PCs dynamically build ARP caches and MAC address tables. With only a few computers on the network this process seems fairly easy. What might be some of the challenges on larger networks?