You don't need to be a network engineer to subnet your home. Here's a practical guide to setting up separate networks for different device types.
Why Subnet Your Home?
- Isolate smart devices from your main computer
- Create guest WiFi that can't access your files
- Reduce network clutter from IoT chatter
Simplest Home Network: Just One Subnet
Default: 192.168.1.0/24 (or 192.168.0.0/24) Router: 192.168.1.1 (or 192.168.0.1) Range: 192.168.1.1 - 254
This is what most routers give you out of the box. Fine for 20-30 devices, but you can't isolate device types.
Better Home Network: Multiple Subnets
Main: 192.168.1.0/24 (computers, phones) IoT: 192.168.2.0/24 (smart bulbs, sensors) Guest: 192.168.3.0/24 (visitor devices)
How Do You Get Multiple Subnets?
Option 1: Router with VLAN Support
Some routers support VLANs (Virtual LANs). Examples:
- ASUS router with "AiMesh" or "VLAN" setting
- UniFi routers
- Flattened custom firmware (DD-WRT, OpenWrt)
Option 2: Separate Hardware
Router 1: Main network (192.168.1.1/24) Router 2: IoT network (192.168.2.1/24) Router 3: Guest network (192.168.3.1/24)
Connect each secondary router to the main router's LAN port, not WAN.
Option 3: Managed Switch + Access Points
VLAN 1: Main devices VLAN 10: IoT devices VLAN 20: Guest
This requires more setup but gives you unified WiFi names.
Recommended Subnet Ranges for Home
10.0.1.0/24 (or 192.168.1.0/24) → Main 10.0.2.0/24 (or 192.168.2.0/24) → IoT 10.0.3.0/24 (or 192.168.3.0/24) → Guest
Avoid 10.0.0.0/24 - too confusing when other ranges exist at 10.x.x.x.
What About WiFi Isolation?
Many routers have "client isolation" or "AP isolation" - this is simpler than full subnetting:
- Guest network: Built-in on most routers - isolated from main
- IoT network: Requires VLAN or separate router
Start with guest WiFi isolation if your router supports it. Add VLANs later if needed.