Home Network VLAN Design Guide

Vendor-neutral 10-page guide with diagrams, subnet maths, firewall matrix, migration plan and a tested subnet planner script. What you get: 10-page PDF with topology, 802.1Q tag and Wi-Fi diagrams, six-VLAN reference design, CIDR...

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Formats: PDF, Python script

What you can check before you buy

v1.0version · file dated Oct 14, 2026

nonemacros in the spreadsheet file

This is a document template, so there are no spreadsheet formulas to recalculate. It was drafted with AI assistance and is not legal or professional advice.

Also included: vlan_planner.py (a plain Python script you can read before running; no spreadsheet macros).

What is in the download

README.md

SOURCES.md

example-output-firewall-matrix.csv

example-output-subnets.csv

example-plan.json

home-network-vlan-design-guide.pdf

vlan_planner.py

Who it is for

Homelabbers who want to separate IoT devices, guests, servers and management traffic onto their own VLANs.
Small-office admins who want a vendor-neutral way to plan segmentation without learning one vendor's menus.
Anyone who wants worked subnet sizing, a firewall allow/deny matrix and a migration plan, with a Python script to generate subnet and firewall tables from their own plan.

Who it is not for

Anyone who wants step-by-step configuration for a specific router, switch or firewall brand. It gives a vendor-neutral design and pseudo-config only.
Anyone looking for a security guarantee. It is a design guide, and it does not promise your network will be secure.
Anyone looking for exploit or attack content. It has none.

About this template

Vendor-neutral 10-page guide with diagrams, subnet maths, firewall matrix, migration plan and a tested subnet planner script.

What you get: 10-page PDF with topology, 802.1Q tag and Wi-Fi diagrams, six-VLAN reference design, CIDR sizing table, firewall allow/deny matrix, DHCP/DNS/mDNS cross-VLAN notes, migration plan, proof tests, pseudo-config and blank worksheets; Python vlan_planner.py (14 tests) with example plan and CSV outputs.

Who it is for: Homelabbers and small-office admins who want to separate untrusted devices without learning one vendor's menus.

Files:

`example-output-firewall-matrix.csv`
`example-output-subnets.csv`
`example-plan.json`
`home-network-vlan-design-guide.pdf`
`vlan_planner.py`

How to use: open the EXAMPLE file first to see every formula working (yellow cells = your inputs, blue-grey = formulas); then use the BLANK file for your own data. See Start_here sheet / included notes. Test examples are in the Tests sheet or `--selftest` where included.

What it is NOT: Not a configuration for a specific product, not a guarantee of security, and no exploit content.

Questions

What file types do I get?

A 10-page PDF guide (home-network-vlan-design-guide.pdf) and a Python script (vlan_planner.py). The download also includes README.md, SOURCES.md, example-plan.json, and two example CSV outputs (subnets and firewall matrix).

Is it specific to one router or switch brand?

No. It is vendor-neutral and uses pseudo-config rather than any one product's settings, so you will need to translate the design into your own equipment's menus.

How do I get started?

Read the PDF for the six-VLAN reference design, CIDR sizing table and firewall matrix. Then try vlan_planner.py with the included example-plan.json to see the example outputs, and fill in the blank worksheets for your own network. The script comes with 14 tests.

Refunds: refunds follow the rules of the marketplace where you buy; if a file is broken we fix or replace it (details). It is a planning tool, not tax, legal, financial or engineering advice. Check rates, limits and rules against the official source before you rely on them. How we check our files.