Most small offices start with one flat network. Every laptop, printer, phone, camera and guest device sits in the same space and can see everything else. It works until it doesn’t: a guest’s infected laptop can reach your file server, a backup job makes calls stutter, and nobody can tell what’s plugged in where.
01
What a VLAN is
A VLAN (virtual LAN) splits one physical network into separate logical networks. Devices on different VLANs can share the same switches and cabling but cannot talk to each other unless you allow it. You need a managed switch to do this. An unmanaged switch treats every port the same.
02
The four VLANs most small offices need
- Staff. Company laptops and desktops. Access to the file server, printers and the internet.
- Voice. Desk phones only, with quality of service so calls take priority over everything else.
- Guest. Visitor Wi-Fi with internet access and nothing else. Guests should never be able to see your printers, let alone your server.
- Servers and management. Servers, storage, cameras and the switches’ own management interfaces, reachable only by the people who look after them.
Larger offices might add separate VLANs for security cameras, building systems or a lab. Start with four. Each extra one should have a clear reason to exist.
03
Rules between the lanes
Splitting the network is only half the job. The router or firewall decides what each VLAN may reach: staff can print, guests can only reach the internet, and only the management VLAN can log in to the switches. Write those rules down in plain language first. If you can’t explain a rule in one sentence, it is probably too broad.
04
Signs your network needs this now
- Guests use the same Wi-Fi password as staff.
- Calls break up when someone uploads or downloads large files.
- You’re adding phones, cameras or Wi-Fi access points to an existing switch.
- Nobody is sure what’s plugged in to which port.
05
How we help
Our managed switch services cover the design, the configuration and the monitoring afterwards, so the network keeps performing as you add wireless, VoIP and more. Book a free 15-minute call below if you’d like us to look at your setup.