5.1.2.8 Lab – Viewing Netjob-related Device MAC Addresses Answers

Lab – Viewing Netoccupational Device MAC Addresses (Answers Version – Optional Lab)

Answers Note: Red font color or gray highlights indicate text that shows up in the instructor copy just. Optional tasks are designed to boost expertise and/or to provide added exercise.

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Topology

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What is the OUI portion of the MAC address for this device?________________________________________________________________________________5C-26-0AWhat is the serial number portion of the MAC resolve for this device?________________________________________________________________________________24-2A-60Using the instance over, find the name of the merchant that manufactured this NIC.________________________________________________________________________________Dell Inc.From the command also prompt on PC-A, issue the ipconfig /all command and identify the OUI portion of the MAC address for the NIC of PC-A.________________________________________________________________________________Answers will certainly differ based upon manufacturer.Identify the serial number portion of the MAC attend to for the NIC of PC-A.________________________________________________________________________________Answers will certainly differ based upon manufacturer serial number code.Identify the name of the merchant that manufactured the NIC of PC-A.________________________________________________________________________________Answers will certainly differ based on manufacturer OUI.Step 2: Analyze the MAC address for the S1 F0/6 interconfront.

You can use a variety of regulates to display screen MAC addresses on the switch.

Console right into S1 and usage the present interfaces vlan 1 command to uncover the MAC attend to information. A sample is displayed listed below. Use output created by your switch to answer the inquiries.S1# show interfaces vlan 1Vlan1 is up, line protocol is up Hardware is EtherSVI, address is 001b.0c6d.8f40 (bia 001b.0c6d.8f40) Web address is 192.168.1.1/24 MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxfill 1/255 Encapsulation ARPA, loopago not set Keepalive not supported ARP type: ARPA, ARP Timeout 04:00:00 Last input never, output 00:14:51, output hang never Last clearing of “present interface” counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output price 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts (0 IP multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 structure, 0 overrun, 0 ignored 34 packets output, 11119 bytes, 0 underruns

0 output errors, 2 interchallenge resets

0 unrecognized protocol drops

0 output buffer failures, 0 output buffers swapped out

What is the MAC attend to for VLAN 1 on S1?____________________________________________________________________________________Answers will vary based on the switch the student is utilizing. Using the output from above, the answer would certainly be 001b.0c6d.8f40.What is the MAC serial number for VLAN 1?____________________________________________________________________________________Answers will vary based on the switch the student is using. Using the output from above, the answer would certainly be 6d-8f-40.

What is the OUI for VLAN 1?____________________________________________________________________________________Answers will certainly differ based upon the switch the student is utilizing. Using the output from above, the answer would be 00-1b-0c.

Based on this OUI, what is the name of the vendor?____________________________________________________________________________________Cisco Systems

What does bia stand also for?____________________________________________________________________________________Burned in attend to.

Why does the output present the exact same MAC deal with twice?____________________________________________________________________________________The MAC deal with deserve to be readjusted by means of a software program command also. The actual attend to (bia) will certainly still be tbelow. It is shown in the parenthesis.Another method to display screen the MAC address on the switch is to use the display arp command also. Use the show arp command to display MAC attend to indevelopment. This command also maps the Layer 2 address to its equivalent Layer 3 attend to. A sample is shown below. Use output produced by your switch to answer the concerns.S1# show arpProtocol Address Age (min) Hardware Addr Type InterfaceInternet 192.168.1.1 – 001b.0c6d.8f40 ARPA Vlan1Internet 192.168.1.3 0 5c26.0a24.2a60 ARPA Vlan1What Layer 2 addresses are presented on S1?____________________________________________________________________________________S1 VLAN 1 and also PC-A MAC addresses. If the student additionally documents the MAC addresses, their answers will differ.What Layer 3 addresses are displayed on S1?____________________________________________________________________________________S1 and PC-A IP addressesTip 3: View the MAC addresses on the switch.Issue the show mac address-table command on S1. A sample is displayed listed below. Use output produced by your switch to answer the concerns.

Answers Note: The present mac address-table command also have the right to differ based upon the design switch you are using. For example, the syntaxes on some switches is show mac-address-table.

S1# show mac address-table

Mac Address Table

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Vlan Mac Address Type Ports

—- ———– ——– —–

 All 0100.0ccc.cccc STATIC CPU

 All 0100.0ccc.cccd STATIC CPU

 All 0180.c200.0000 STATIC CPU

 All 0180.c200.0001 STATIC CPU

 All 0180.c200.0002 STATIC CPU

 All 0180.c200.0003 STATIC CPU

 All 0180.c200.0004 STATIC CPU

 All 0180.c200.0005 STATIC CPU

 All 0180.c200.0006 STATIC CPU

 All 0180.c200.0007 STATIC CPU

 All 0180.c200.0008 STATIC CPU

 All 0180.c200.0009 STATIC CPU

 All 0180.c200.000a STATIC CPU

 All 0180.c200.000b STATIC CPU

 All 0180.c200.000c STATIC CPU

 All 0180.c200.000d STATIC CPU

 All 0180.c200.000e STATIC CPU

 All 0180.c200.000f STATIC CPU

 All 0180.c200.0010 STATIC CPU

 All ffff.ffff.ffff STATIC CPU

1 5c26.0a24.2a60 DYNAMIC Fa0/6

Total Mac Addresses for this criterion: 21

Did the switch display screen the MAC resolve of PC-A? If you answered yes, what port was it on?

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Yes. Port need to be F0/6. Answers will certainly differ for the MAC attend to. In the example over, the MAC deal with would certainly be 5c26.0a24.2a60.

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Reflection

Can you have actually broadcasts at the Layer 2 level? If so, what would the MAC resolve be?_______________________________________________________________________________________You deserve to have actually broadcasts at Layer 2. ARP will certainly usage broadcasts to uncover MAC resolve information. The broadactors resolve is FF.FF.FF.FF.FF.FF.Why would you need to understand the MAC attend to of a device?_______________________________________________________________________________________There could be a selection of factors. In a huge netjob-related, it might be simpler to pinsuggest location and also identity of an equipment by its MAC resolve instead of its IP resolve. The MAC OUI will list the manufacturer, which may assist narrow dvery own the search. Security steps deserve to be applied at Layer 2, so knowledge of allowable MAC addresses is required.

Device Config

Switch S1

S1# present run