and allow Suricata to do its IPS work.
Pretty much this. I have several VLANS set up to segrigate traffic. For instance, one VLAN services the 'smart' TVs and gives access for my lady friend when she comes to visit. She apparently likes ads and crap hogging her screen's real estate. I have tried to get her to listen to reason, but as soon as there is an issue, it becomes an exercise in figuring out what is blocking her unfettered access. So I want that totally separate from traffic destined in and out of my server. Then I have a VLAN for some 25 security cameras, and a VLAN for server and lab operations. I make no Guest accommodations for Wi-Fi tho. You are either trusted, or not.
It might be overly complicated, but I like to 'keep 'em separated', and it seems to work just jammy, so there's that.