Add VLAN to working system

[kenw]

I’m currently running 23.01-release on a Netgate SG-1100. I’m using both the LAN and OPT interfaces with no problems but I’d like to add vlans(s) on the LAN port.

I know how to configure vlans on pfsense but don’t know if/how this will impact existing systems on the LAN interface or how to configure the managed switch connected to pfsense. On the managed switch, will I have to assign ports for vlan 4091 as well as the new vlans?

Any help on how I need to configure the managed switch would be greatly appreciated.

thanks