11.10.2 Lab Report

Lab 11.10.2 - Design and Implement a VLSM Addressing Scheme Part 1- Examine Network Requirements Step 1: Determine how many host addresses and subnets are available. How many host addresses are available in a /25 network? 126 What is the total number of host addresses needed in the topology diagram? 80 How many subnets are needed in the network topology? 6 Step 2: Determine the largest subnet. What is the subnet description (e.g. BR1 LAN or BR1-BR2 link)? BR1 LAN How many IP addresses are required in the largest subnet? 40 What subnet mask can support that many host addresses? /26 or 255.255.255.192 How many total host addresses can that subnet mask support? 62 Can you subnet the 192.168.33.128/25 network address to support this subnet? Yes. What are the network addresses that would result from this subnetting? 192.168.33.128/26 and 192.168.33.192/26 Use the first network address for this subnet. Step 3: Determine the second largest subnet. Page 1 of 8

What is the subnet description? BR2 LAN How many IP addresses are required for the second largest subnet? 25 What subnet mask can support that many host addresses? /27 or 255.255.255.224 How many total host addresses can that subnet mask support? 30 Can you subnet the remaining subnet again and still support this subnet? Yes What are the network addresses that would result from this subnetting? 192.168.33.192/27 and 192.168.33.224/27 Use the first network address for this subnet. Step 4: Determine the third largest subnet. What is the subnet description? BR2 IoT LAN How many IP addresses are required for the next largest subnet? 5 for BR2 IoT LAN, 4 for BR2 CCTV LAN, 4 for BR2 HVAC C2LAN What subnet mask can support that many host addresses? /29 or 255.255.255.248 How many total host addresses can that subnet mask support? 6 Can you subnet the remaining subnet again and still support this subnet? Yes What are the network addresses that would result from this subnetting? Page 2 of 8

Part 2- Design the VLSM Address Scheme Step 1: Calculate the subnet information. Subnet Description Number of Hosts Needed Network Address /CIDR First Host Address Broadcast Address BR1 LAN 40 192.168.33.128/2 6 192.168.33.129 192.168.33.191 BR2 LAN 25 192.168.33.192/2 7 192.168.33.193 192.168.33.223 BR2 IoT LAN 5 192.168.33.224/2 9 192.168.33.225 192.168.33.231 BR2 CCTV LAN 4 192.168.33.232/2 9 192.168.33.233 192.168.33.239 BR2 HVAC C2LAN 4 192.168.33.240/2 9 192.168.33.241 192.168.33.247 BR1-BR2 Link 2 192.168.33.248/3 0 192.168.33.249 192.168.33.251 Step 2: Complete the device interface address table. Device Interface IP Address Subnet Mask Device Interface BR1 G0/0/0 192.168.33.249 255.255.255.252 BR1-BR2 Link G0/0/1 192.168.33.129 255.255.255.192 40 Host LAN BR2 G0/0/0 192.168.33.250 255.255.255.252 BR1-BR2 Link G0/0/1 192.168.33.193 255.255.255.224 25 Host LAN Page 4 of 8

Part 3- Cable and Configure the IPv4 Network Step 1: Cable the network as shown in the topology. Step 2: Configure basic settings on each router. BR1 - basic config Page 5 of 8

Step 3: Configure the interfaces on each router. BR1 - config interface BR2 - config interface Step 4: Save the configuration on all devices. BR1 - save config Page 7 of 8

BR2 - save config Step 5: Test Connectivity 1. From BR1, ping BR2’s G0/0/0 interface. 2. From BR2, ping BR1’s G0/0/0 interface. Reflection Questions: 1. Can you think of a shortcut for calculating the network addresses of consecutive /30 subnets? Take the previous subnet network address and a dd 4 to the last octet, as every /30 subnet has 4 host IP addresses. Page 8 of 8