To set up a VLAN on your router, here are the steps to follow:

1. Check if your router supports VLANs: Most popular router models support VLANs, but it is best to double-check just in case.
2. Log in to the router: You’ll need to enter an IP address into your web browser to gain access to the router’s administrator interface.
3. Configure the VLAN: Depending on your router’s manufacturer and model, the steps may vary. The configuration generally entails creating new VLANs, assigning switches and ports to the VLANs, and setting up the tagging.
4. Save and test: Be sure to save the configurations when prompted and reset the router to apply changes. After that, you can test the connection.