6.4.1 Packet Tracer – Basic VLSM Calculation and Addressing Design Answers
Topology
Addressing Table
| Device | Interface | IP Address | Subnet Mask | Default Gateway |
|---|---|---|---|---|
| HQ | Fa0/0 | N/A | ||
| S0/0/0 | N/A | |||
| S0/0/1 | N/A | |||
| Lo1 | N/A | |||
| Branch 1 | Fa0/0 | N/A | ||
| S0/0/0 | N/A | |||
| S0/0/1 | N/A | |||
| Branch 2 | Fa0/0 | N/A | ||
| S0/0/0 | N/A | |||
| S0/0/1 | N/A | |||
| PC1 | NIC | |||
| PC2 | NIC | |||
| PC3 | NIC |
Learning Objectives
- Determine the number of subnets needed.
- Determine the number of hosts needed for each subnet.
- Design an appropriate addressing scheme using VLSM.
- Assign addresses and subnet mask pairs to device interfaces.
- Examine the use of the available network address space.
Introduction:
In this activity, you have been given the network address 192.168.1.0/24 to subnet and provide the IP addressing for the network shown in the topology diagram. VLSM will be used so that the addressing requirements can be met using the 192.168.1.0/24 network. The network has the following addressing requirements:
- The HQ LAN1 will require 50 host IP addresses.
- The HQ LAN2 will require 50 host IP addresses.
- The Branch1 LAN1 will require 20 host IP addresses.
- The Branch1 LAN2 will require 20 host IP addresses
- The Branch2 LAN1 will require 12 host IP addresses.
- The Branch2 LAN2 will require 12 host IP addresses.
- The link from HQ to Branch1 will require an IP address for each end of the link.
- The link from HQ to Branch2 will require an IP address for each end of the link.
- The link Branch1 to Branch2 will require an IP address for each end of the link.
Task 1:
Assign IP addresses to the network devices. Assign the appropriate addresses to the device interfaces. Document the addresses to be used in the addressing table provided under the topology diagram.
Step 1. Assign addresses to the HQ router.
1. Assign the first valid host address in the HQ LAN 1 subnet to the Fa0/0 LAN interface.
2.Assign the first valid host address in the HQ LAN 2 subnet to the Fa0/1 LAN interface.
3. Assign the first valid host address on the link between HQ and Branch1 subnet to the S0/0/0 interface.
4. Assign the first valid host address in the link between HQ and Branch2 subnet to the S0/0/1 interface.
Step 2. Assign addresses to the Branch1 router.
1. Assign the first valid host address in the Branch1 LAN1 subnet to the Fa0/0 LAN interface.
2. Assign the first valid host address in the Branch1 LAN2 subnet to the Fa0/1 LAN interface.
3. Assign the last valid host address on the link between Branch1 and HQ subnet to the S0/0/0 interface
4. Assign the first valid host address on the link between Branch1 and Branch2 subnet to the S0/0/1 interface.
Step 3. Assign addresses to the Branch2 router.
1. Assign the first valid host address in the Branch2 LAN1 subnet to the Fa0/0 LAN interface.
2. Assign the first valid host address in the Branch 2 LAN 2 subnet to the Fa0/1 LAN interface.
3. Assign the last valid host address on the link between HQ and Branch2 subnet to the S0/0/1 interface
4. Assign the last valid host address on the link between Branch1 and Branch2 subnet to the S0/0/0 interface.
