configure interfaces as a switch

I have a fortinet that has several vdom and all work properly but I want to configure some interfaces on the firewall but I want to only pass traffic does not analyze it or anything just to work as a swicth I think it could be done with a vdom in transparent mode but I'm not sure if that would work and at the same time would work properly the other vdom.

I wouldn't know how to configure the vdom in transparent mode either.