6.4.3 Packet Tracer – Troubleshooting a VLSM Addressing Design Answers
Topology
| Subnet | Number of IP Addresses Needed | Network Address |
|---|---|---|
| HQ LAN1 | 16,000 | 172.16.128.0/19 |
| HQ LAN2 | 8,000 | 172.16.192.0/18 |
| Branch1 LAN1 | 4,000 | 172.16.224.0/20 |
| Branch1 LAN2 | 2,000 | 172.16.240.0/21 |
| Branch2 LAN1 | 1,000 | 172.16.244.0/24 |
| Branch2 LAN2 | 500 | 172.16.252.0/23 |
| Link from HQ to Branch1 | 2 | 172.16.254.0/28 |
| Link from HQ to Branch2 | 2 | 172.16.154.6/30 |
| Link from Branch1 to Branch2 | 2 | 172.16.254.8/30 |
Learning Objectives:
Upon completion of this activity, you will be able to:
- Discover errors in a VLSM design.
- Propose solutions for VLSM design errors.
- Document the corrected VLSM assignments.
Scenario
In this activity, the network address 172.16.128.0/17 has been used to provide the IP addressing for the network shown in the topology diagram. VLSM has been used to subnet the address space incorrectly. You need to troubleshoot the addressing that has been assigned for each subnet to determine where errors exist and then determine the correct addressing assignments, where needed. Configure the devices with the correct addressing.
