You can, but... 1) if you run HassOS (Home Assistant Operating System), getting root shell where you can run appropriate nmcli commands is unnecessary convolut

You can, but... 1) if you run HassOS (Home Assistant Operating System), getting root shell where you can run appropriate nmcli commands is unnecessary convoluted (there are two "ssh & terminal" extensions, the "official" one won't give you a shell on the host, due to "security"). The good news is, that once you do have the root shell, configuring vlans is easy, it runs standard NetworkManager. 2) if you do not run HassOS, but inside a docker on some other common home devices, they can have their footguns too. For example, if you have Synology NAS and run HA in docker, you are going to google for blog posts how to configure vlans + bonding (spoiler: no hybrid ports, only trunk), or vlans + openswitch, or, heaven forbid, vlans + bonding + openswitch. That are going to be few evenings appropriately spent. 3) Some devices, when connecting to wifi, would connect successfully only if the device you are pairing it from is on the same wifi (i.e. you can't have your phone on your main ssid/vlan and connect the device to isolated ssid/vlan). Bosch Home Connect, I'm looking at you...