Issue the show mac address-table command on S1. If the switches at the layer-2 don’t follow any routing table then how they will learn the MAC address (unique address of a machine like 3C-95-09-9C-21-G2) of the next hop?. a. 2. The actual address (bia) will still be there. Answers will vary for the MAC address. Each layer will examine the header and determine where to pass it up to until eventually, the data reaches the application running on the destination computer that has been waiting for the data. The command _show controllers displays information about the physical interface. Background / Scenario. Router a will receive this frame and send the data portion up to the network layer (layer 3). Step 3: View the MAC addresses on the switch. Every device on an Ethernet LAN is identified by a Layer 2 MAC address. Which switching technology would allow each access layer switch link to be aggregated to provide more bandwidth between each Layer 2 switch and the Layer 3 switch? This allows technicians to assign an IP address and subnet mask to the interface the same way it is configured on a router’s interface. d. Configure and enable the SVI interface for VLAN 1. ARP will use broadcasts to find MAC address information. What is the MAC address for VLAN 1 on S1?____________________________________________________________________________________ Lab – Viewing Network Device MAC Addresses S1 Vlan1 and PC-A MAC addresses. The network 2 is also an ethernet network. The exhibit shows a small switched network and the contents of the MAC address table of the switch. What is the MAC address for VLAN 1 on S1? What Layer 3 addresses are displayed on S1? This document discusses possible causes and implications of Note: MAC addresses are also called physical addresses, hardware addresses, or Ethernet hardware addresses. Many of the commands that you used on R1 can also be used with the switch. 24-2A-60. From the command prompt on PC-A, issue the ipconfig /all command and identify the OUI portion of the MAC address for the NIC of PC-A. b. MAC operates at Layer 2 of the OSI model while IP operates at Layer 3. Console into S1 and use the show interfaces vlan 1 command to find the MAC address information. Last Updated on January 14, 2021 by Admin. Note: Make sure that the switches have been erased and have no startup configurations. You will verify your configurations by testing for network connectivity. Place the options in the following order: disable-> administratively down Layer 1 problem-> down/down – not scored – Layer 2 problem-> up/down operational-> up/up Found inside – Page 115To verify the IP address set on a switch, you can use the show interface ... Total Mac Addresses for this criterion: 31 S1# 116 Chapter 5 Layer-2 Switching ... The S1 interface fa6/3 is connected to the S2 interface fa3/3, and a DHCP server is connected to S1. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment. Answers will vary. To find the manufacturer, use the keywords IEEE OUI standards to find an OUI lookup tool on the internet or navigate to http://standards-oui.ieee.org/oui.txt to find the registered OUI vendor codes. They are displayed using six sets of hexadecimal digits that are usually separated by dashes, colons, or periods. What Layer 2 addresses are displayed on S1? You can issue the ipconfig /all command to view the MAC address of your NIC. Every device on an Ethernet LAN is identified by a Layer 2 MAC address. In the implementation of network security, how does the deployment of a Cisco ASA firewall differ from a Cisco IOS router? Use the information in the addressing table to configure S2 with an IP address. RT1#show controllers . Vlan1 Vlan1 S1 Vlan1 and PC-A MAC addresses are displayed: 001b:0c6d:8f40 and 5c26:0a24:2a60 What Layer 3 addresses are displayed on S1? Were the pings successful? In this section, network layer (Layer 3) addressing is covered in enough depth to describe IP, IPX, and AppleTalk addresses. Also, now that data link layer and network layer addresses have been covered in this book, this section undertakes a comparison between the two. Dell Inc. b. Can you have broadcasts at the Layer 2 level? Found inside – Page 628When a Layer 2 switch receives a frame, it adds that source MAC address that ... R1 should use its s1/2 interface for forwarding a packet to the 20 subnet. ... What two pieces of information are displayed in the output of the show ip interface brief command? What type of network security test uses simulated attacks to determine the feasibility of an attack as well as the possible consequences if the attack occurs? When using the ipconfig /all command, notice that MAC addresses are referred to as physical addresses. MAC addresses are 48 bits (6 bytes) long, usually written as 12 hexadecimal digits. The answer is that it will do it by following the Address resolution Protocol known as ARP. Another way to display the MAC address on the switch is to use the show arp command. Using the output from above, the answer would be 00-1b-0c. The switch records host MAC addresses that are visible on the network, and maps those MAC addresses to its own Ethernet switch ports. When we go to IPv6, only the network layer should change (it probably won't but that's more to do with how the layers tend to blur, but if it were truly layered that would be the case). When the default gateway (router) receives the frame it will see that the MAC address matches it's own, so the frame must be for it. * The MAC address table is full. Depending on the model and Cisco IOS version, the commands available and the output produced might vary from what is shown in the labs. [1] The data link layer provides the functional and procedural means to transfer data between network entities and might provide the means to detect and possibly correct errors that may occur in the physical layer. The MAC address is a layer 2 (data link) address. It will pertain to a single protocol (such as IP, IPX, or Appletalk). Answer options A and B are correct. If you are unsure, ask your instructor. On a Windows 7 PC, the arp -a command is used. Optional activities are designed to enhance understanding and/or to provide additional practice. Refer to the exhibit. The network layer uses network addresses (typically Internet Protocol addresses) to route packets to a destination node. It pertains to the actual hardware interface (NIC) in the computer. Now then, I did slightly gloss over 1 part in the above explanation and that's the part about the router finding out the hardware address for the next hop. A sample is shown below. Answers will vary for the MAC address. In this part, you will set up the network topology and configure basic settings, such as the interface IP addresses and device name. Identify the serial number portion of the MAC address for the NIC of PC-A. We want to allow traffic from the management LAN to the server S1. Found inside – Page 21Step 2. Configure the SVI. This makes the switch accessible for network ... SVI of S1 S1(config)# interface vlan 1 S1(config-if)# ip address 192.168.10.2 ... The broadcast address is FF.FF.FF.FF.FF.FF. Using the output from the ipconfig /all command, answer the following questions. What is the difference between a Layer 2 switch and a Layer 3 switch? A computer can have any number of layer 3 addresses but it will only have 1 layer 2 address per LAN interface. What does bia stand for?____________________________________________________________________________________ Why does the output show the same MAC address twice? You can issue the ipconfig /all command to view the MAC address of your NIC. At layer 2 though, the data is addressed to the next hop. Step 2: Analyze the MAC address for the S1 F0/6 interface. Also connected to network 2 is another router (router b) which has the address (for the interface connected to network 2 at least) of 200.0.2.2. It will see that the packet is addressed to a host that's on a directly connected network (the closest match you can get for an address, short of the packet being addressed to you). The switch has not been configured yet. Answers will vary based on manufacturer. Since this request is broadcast, all machines on the LAN will receive it and examine the contents. Burned in address. We'll assume that none of the info in already cached in an ARP table on any of the machines or routers (a big assumption but it's mine to make!). Depending on the model and Cisco IOS version, the commands available and the output produced might vary from what is shown in the labs. Found inside – Page 139Part C: simulating attacks on layer 2 Download and install the hyenae1 tool. ... S1#sh mac-address-table Destination Address Address Type VLAN Destination ... It is shown in the parenthesis. Router b will send out an ARP request to learn the MAC address for 200.0.3.2. The layer 3 address is a logical address. If so, what would the MAC address be?_______________________________________________________________________________________, Why would you need to know the MAC address of a device?_______________________________________________________________________________________. ), What three tasks can a network administrator accomplish with the Nmap and Zenmap security testing tools? A sample is shown below. Did the switch display the MAC address of PC-A? Switching Queues Layer-2 switches utilize queues to store incoming and … However, there are some differences with some of the commands. On receiving the MAC address, your computer will send out the IP packet (still addressed to 200.0.3.2) encapsulated within a data link frame that is addressed to the MAC address of router a's interface on network 1 (because routers have more than 1 interface they can have more than 1 MAC address, in this case each router has 2 ethernet interface each with it's own unique MAC address). If the IP address in the request is their own, they'll reply. Issue the show mac address-table command on S1. Based on the subnet mask, your computer will know that the destination computer isn't on the same local network. This lab will explore and analyze the components that make up a MAC address, and how you can find this information on a switch and a PC. Issue the show mac address-table command on S1. Both hosts acquire their IP addresses from the same DHCP server. Using the example above, find the name of the vendor that manufactured this NIC. Using the output from above, the answer would be 001b.0c6d.8f40. Ethernet MAC addresses are 48-bits long. 1.2 Data Rate, Throughput and Bandwidth¶. Instructor Note: Refer to the Instructor Lab Manual for the procedures to initialize and reload devices. When a match is found, the router will create a new data link frame addressed to the next hop (and if the router doesn't know the hardware address for the next hop it will request it using the appropriate means for the technology in question). You will issue commands to display the MAC addresses on a PC and a switch, and analyze the properties of each one. Additionally, it can do static routing and dynamic routing. S1 VLAN 1 and PC-A MAC addresses. The layer 2 address is a physical address. Issue the show mac address-table command on S1. The last six digits are the NIC serial number assigned by the manufacturer. At the network layer you get more specific (this is the exact computer I want to send this to). The MAC address can be changed via a software command. Issue the show mac address-table command on S1. d. HTTP access to the switch is enabled by default. Why would you need to know the MAC address of a device? Currently all switches are using the default bridge priority value. 0 output buffer failures, 0 output buffers swapped out. Answers will vary based on manufacturer serial number code. Configure and enable the SVI interface for VLAN 1. If the IP is local, your computer will look in it's ARP table (a table where the responses to previous ARP requests are cached) to find the MAC address. It's layered so that any layer can change and as long as it takes in information in a standard way (the way the layer above wants to send it) and spits out information in a standard way (the way the layer below wants to receive it), then it's all good. If multiple networks are connected to a switch, you need to specify how the switch forwards the internetwork frames, because the path must be determined at Layer three. From the command prompt on PC-A, ping the switch address. The MAC address is a layer 2 (data link) address. Based on this OUI, what is the name of the vendor?____________________________________________________________________________________ Step 1: Cable the network as shown in the topology. At the network layer, the router will see that the destination IP address (contained in the header of the IP packet) does not match it's own (remember, the IP address has not been touched at all in this process since your computer created the IP packet). S1(config)# no ip domain-lookup. A sample is shown below. Found inside – Page 457of octets 1 1 2 4 version type reserved checksum group address Figure 15.4 IGMP ... Version 3 also changed the layer 2 address that an endnode uses when ... Reading the MAC address from left to right, the first six hex digits refer to the vendor (manufacturer) of this device. Above that you get more specific (is it TCP or UDP?, what port?, etc). Attach the devices shown in the topology and cable as necessary. What is the OUI for VLAN 1?____________________________________________________________________________________ This process will continue at each router along the way until the information reaches a router connected to the destination network. At the network layer, the IP address will also match that of the computer and the data from the IP packet will be passed up to the transport layer. Page 149Display the MAC addresses on the switch the student is using device MAC only. 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