Logical Network Segmenter

Design port assignments and 802.1Q trunk tagging for enterprise-grade managed switches.

Port #1 Configuration

Configured Segments

Default Data
VLAN 10
VoIP Traffic
VLAN 20

What does the VLAN & Trunk Designer do?

This tool helps visualize logical segmentation on switches. It explains access ports, trunk ports, VLAN IDs, and 802.1Q tagging so you can plan how traffic should move between users, servers, wireless networks, and network devices.

Why VLAN planning matters

VLANs separate broadcast domains and support security boundaries. Good VLAN design can isolate guests, voice devices, cameras, management interfaces, production servers, and user networks while still allowing controlled routing between them.

Who benefits from it?

Network engineers, sysadmins, MSPs, students, campus IT teams, and small business administrators can use it to reason about switch port roles before touching production equipment.

FAQ

What is an access port? An access port carries traffic for one untagged VLAN, usually to an end device.

What is a trunk port? A trunk port carries multiple VLANs between switches, routers, firewalls, or virtualization hosts.

What is 802.1Q? 802.1Q is the common Ethernet tagging standard used to identify VLAN membership on trunk links.

? How to Use VLAN & Trunk Designer | Logical Network Segmenter

  1. Open the networking tool in your browser.
  2. Enter the IP address, domain, subnet, or network data.
  3. Select the calculation or lookup type you need.
  4. Click the action button to get instant results.
  5. Copy or export the network information for your records.

✓ Why Use This Tool

  • 100% Free — No account, subscription, or payment required.
  • Privacy First — All processing happens in your browser. Your files never leave your device.
  • No Installation — Works directly in any modern browser on any device.
  • Instant Results — Get your output in seconds without waiting for server processing.

Frequently Asked Questions

Can I use these networking tools without installing any software?

Yes. All IT and networking tools run directly in your browser. There is nothing to install, no configuration required, and they work on any operating system.

How accurate is the network diagnostic information?

The tools query live DNS resolvers and use your browser's network APIs for real-time data. Results reflect your actual network conditions at the time of the query.

Can IT professionals use these tools for client network diagnostics?

Yes. These tools are designed for professional use and provide accurate, real-time network information suitable for diagnosing DNS misconfigurations, IP conflicts, and connectivity issues.