What is the role of VLANs in a network infrastructure and how do you configure them on a switch?

Understanding the Role of VLANs in Network Infrastructure and Configuring Them on a Switch

Virtual Local Area Networks (VLANs) play a crucial role in segregating network traffic and enhancing network security in a network infrastructure. VLANs allow network administrators to logically divide a single physical network into multiple isolated networks, each functioning as a separate entity with its own broadcast domain.

Configuring VLANs on a switch involves the following steps:

1. Access the switch's management interface (console, SSH, or web interface).
2. Create the VLANs by assigning a VLAN ID and name to each VLAN.
3. Assign specific switch ports to the respective VLANs.
4. Configure trunk ports to carry traffic for multiple VLANs between switches.
5. Ensure proper VLAN tagging (VLAN ID) on trunk links connecting switches.
6. Configure VLAN interfaces for routing between VLANs (if required).

By implementing VLANs, network administrators can enhance network performance, improve security by isolating sensitive data, and optimize network resources by segregating traffic types.

If you are looking to optimize your network infrastructure, understanding the role of VLANs and how to configure them on a switch is essential.