When we install or take over a camera system, one step is non-negotiable for us: the cameras go on their own VLAN. Clients sometimes ask whether that is overkill for a house or a small shop.
It is not, and the reasons are easy to understand once you know what cameras actually do on a network. Let's start with what a VLAN even is.
A VLAN, in plain language
Think of your network as a building. Normally, every device lives in one big open room: laptops, phones, printers, cameras, the smart thermostat. Everyone can see everyone, and everyone hears everyone's conversations shouted across the room.
A VLAN (virtual LAN) puts up walls. Using the same switches and cables you already own, the network is divided into separate rooms. Devices in the camera room can talk to each other and to the recorder, but they cannot wander into the room where your laptop keeps its files. A door between rooms exists, but it goes through the router, where rules decide exactly who may pass and in which direction.
No new wiring. It is configuration, not construction. Any decent business-grade or prosumer network gear supports it.
So why do cameras, specifically, deserve their own room?
Cameras phone home, and you do not control the conversation
Inexpensive cameras are small computers running software you cannot inspect, made by companies you know nothing about, with a lens pointed at your property. Watch one on a network monitor and you will often find it chattering away to servers overseas: telemetry, cloud check-ins, update checks, sometimes connections with no obvious purpose at all.
Worse, camera firmware has a poor security track record across the industry, and most cameras stop receiving fixes long before they stop being used. A five-year-old camera with a known, unpatched flaw is a foothold. On a flat network, a compromised camera can reach your computers, your NAS, your accounting files. On its own VLAN with sensible rules, it can reach the recorder and nothing else. The rules can even block its internet access entirely, which for locally recorded systems costs you nothing and ends the phoning-home question outright.
This is the same reasoning behind separating visitors from your own devices, which we covered in guest Wi-Fi done right. Cameras are just guests that never leave.
The broadcast noise problem
There is a mundane reason too. Cameras are noisy neighbours.
Video streams are constant, and camera systems lean on discovery protocols that broadcast to the whole room, repeatedly, forever. A dozen cameras on a flat network add a background hum of traffic that every other device has to hear and ignore. On busy networks this shows up as mysterious sluggishness that nobody attributes to the cameras.
Wall them off and the hum stays in their room. Your recorder still hears everything it needs to; your video calls stop sharing the hallway with a dozen shouting cameras.
The same logic applies to the rest of your smart devices
Once the camera VLAN exists, the pattern usually extends naturally: an IoT room for the thermostat, smart plugs, the TV, the doorbell. Same reasoning, same benefits. These devices need the internet and little else, and they certainly do not need a path to your computers.
A typical small setup ends up with three or four rooms: your trusted devices, guests, cameras, and other smart things. That structure takes an afternoon to set up properly and then quietly does its job for years.
Worth doing properly
The honest caveat: VLANs involve real configuration, and half-done VLANs cause confusing problems, like an app that cannot find the recorder because the door rules are wrong. The concepts are simple; the details reward care. If you are comfortable in your router's settings, it is a satisfying weekend project. If not, it is a small professional job with a long payoff.
We build this segmentation into every camera system we install, and we bring existing systems up to the same standard when we take them over. If your cameras are currently sitting in the same room as your tax files, our security camera installation service includes fixing that, and you can reach us here.
Cabling, networks, cameras, access control, smart homes, hosting and software for homes and small business across Southwestern Ontario. Twenty-plus years in the trade, and we still answer the phone.