Networking Fundamentals

VLAN Calculator — Plan Your Network VLANs Online

G Gurpreet Singh July 28, 2026 1 min read
VLAN Calculator — Plan Your Network VLANs Online

VLAN Planning Calculator

Design your VLAN structure by adding departments or network segments. The calculator assigns IP subnets and generates a configuration summary for each VLAN.



VLANs to Create


VLAN Best Practices

  • Separate sensitive traffic: Always put management interfaces, security cameras, and IoT devices on separate VLANs.
  • Use VLAN 1 carefully: VLAN 1 is the default on Cisco switches — never use it for user traffic. Keep it for management only or change the native VLAN.
  • Plan for growth: Leave gaps in VLAN ID numbering (10, 20, 30) so you can add VLANs between existing ones later.
  • Document everything: Always maintain a VLAN database showing which VLAN serves which purpose and which ports belong to it.

Learn more about VLANs in our comprehensive guides: What is a VLAN?, VTP — VLAN Trunking Protocol, and VLAN vs Subnet. For subnetting help, use our free subnet calculator.

GU
Written by

Gurpreet Singh

Hey! I"m Gurpreet Singh and I Have 7+ Years of experience in the Network & Security Domain as well as the Cloud Infra Domain. I am Certified with Cisco ( CCNA ), CheckPoint ( CCSA ), 1xAWS, 3xAZURE, and 3xNSE. So I love to share my tech knowledge with you.

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