Desain Subnetting menggunakan VLSM pada Cisco Packet Tracer

Summary

In this video, Aditya Pratama, a student of Informatics Engineering, demonstrates how to design a network using VLSM (Variable Length Subnet Mask). He walks through a practical example of PT XYZ, a company that needs to divide its IP network for various departments, including finance, marketing, production, HR, and warehouse. The process involves calculating the required IP addresses, subnetting, and configuring routers for communication between different subnets. Through clear steps and practical examples, the video provides an accessible introduction to VLSM and network design.

Takeaways

• 😀 VLSM (Variable-Length Subnet Mask) is a method used to allocate IP subnets based on the specific needs of a network division.
• 😀 PT XYZ, a company in the scenario, has multiple divisions with different host requirements: Finance (20), Marketing (40), Production (30), HR (5), and Warehouse (4).
• 😀 The process starts by identifying the subnet size needed for each division based on the number of hosts required.
• 😀 VLSM allows flexibility by assigning varying subnet sizes for each division rather than using a single uniform subnet size.
• 😀 The first step is to calculate the appropriate subnet for the largest division, such as Marketing with 40 hosts, to ensure it can accommodate the required number of hosts.
• 😀 Routers and switches need to be properly configured to route traffic between different subnets, and static routes are added for communication.
• 😀 A crossover cable is used to connect routers to the network, ensuring proper routing between subnetted segments.
• 😀 After configuring the devices, network connectivity is tested using the 'ping' command to ensure that communication is working as expected across subnets.
• 😀 The network design also includes testing the configuration, ensuring all devices within the subnets are able to communicate without issues.
• 😀 VLSM is efficient for optimizing IP address usage by providing subnets with the appropriate size, reducing wasted IP addresses in smaller divisions.

Q & A

What is VLSM and how is it used in network design?

VLSM (Variable-Length Subnet Mask) is a technique used to allocate subnet masks of different lengths to different subnets, depending on the number of hosts needed. It allows for more efficient use of IP address space by providing smaller subnets for smaller networks and larger subnets for larger networks.

What is the IP address used in the example for PT XYZ?

The IP address used in the example for PT XYZ is 172.16.28.0.

What divisions or departments are involved in the network design for PT XYZ?

The divisions involved in the network design for PT XYZ are Finance (20 hosts), Marketing (40 hosts), Production (30 hosts), IT (5 hosts), and Warehouse (4 hosts).

How does VLSM help in optimizing network design for PT XYZ?

VLSM helps optimize network design by providing the right number of IP addresses for each department based on its host requirements, avoiding unnecessary waste of IP addresses and ensuring that each department has enough IP space.

What subnet mask is used for the Marketing department, and why?

The Marketing department uses a subnet mask of /26 because it requires 40 hosts, and this subnet mask provides enough addresses to accommodate the necessary host IPs.

Why is subnetting necessary for PT XYZ?

Subnetting is necessary for PT XYZ to divide its large IP address block into smaller subnets, ensuring efficient use of IP addresses and isolating different departments or divisions for better network management and security.

How does the router configuration work in this network setup?

The router configuration involves setting up static routes for each subnet, ensuring communication between different subnets. The routers are connected through specific interfaces, with routing tables updated to reflect the subnets' IP addresses.

What testing method is used to verify the configuration of the network?

The testing method used is a ping test, which checks the communication between PCs across different subnets to verify the correct configuration and ensure network connectivity.

What role do switches play in the network design for PT XYZ?

Switches are used to connect devices within each subnet. Each subnet is connected to a switch, which in turn connects to a router for communication with other subnets.

What is the importance of routing in this network design?

Routing is crucial in this network design to enable communication between different subnets. Static routing is configured on the routers to ensure data can flow between the subnets and reach the intended destination.